Suppressors and their methods of manufacture

Abstract

A suppressor having a body and a first connector half coupled to the body, wherein the first connector half includes a first component that includes at least one channel and a first surface; and wherein the body provides a second surface, wherein a gap between the first surface and the second surface defines at least one track; wherein the gun includes a second connector half comprising at least one protrusion, wherein the protrusion and channel have corresponding shapes that allow the protrusion to be inserted through the channel and into alignment with the track, wherein the first component may be rotated with respect to the protrusion and the body to bring the protrusion out of alignment with the channel so that the first and second surfaces clamp the protrusion to thereby secure the first connector half and second connector half with respect to each other.

Claims

1. A method of manufacturing at least a part of a suppressor, wherein the part of the suppressor includes an end wall and at least one sidewall defining an outer housing with an internal cavity, an outlet in the end wall for a bullet to exit the suppressor, and at least one baffle within the internal cavity, wherein the method comprises manufacturing the part of the suppressor using selective metal melting by: a. depositing a starter material onto a substrate; b. melting the starter material to form a layer of the part of the suppressor; and c. repeating steps (a) and (b) in a build direction from an end of the outer housing so as to form the outer housing and the at least one baffle within the internal cavity, with the outer housing and the at least one baffle monolithically formed together in a monocoque structure.

2. The method as claimed in claim 1, wherein the build direction is from the end wall of the outer housing so as to form the end wall and the at least one side wall extending from the end wall.

3. The method as claimed in claim 1, wherein the build direction to parallel to the side wall.

4. The method as claimed in claim 1, wherein step c includes forming the at least one baffle within the internal cavity monolithically formed with an inner surface of the at least one sidewall of the outer housing.

5. The method as claimed in claim 4, wherein the method forms the at least one baffle monolithically formed with the inner surface of the at least one side wall of the outer housing substantially about an inner circumference of the inner surface of the at least one sidewall.

6. The method as claimed in claim 1, wherein steps a-c include forming an aperture in the at least one baffle and the outlet in the end wall such that the aperture and outlet are aligned with each other and define a pathway for the bullet to travel through the suppressor.

7. The method as claimed in claim 1, including a step of forming a fastener integrally to the part of the suppressor to attach the suppressor to an end of a barrel of a firearm.

8. The method as claimed in claim 1, wherein the step of forming the baffle involves monolithically forming the baffle with the at least one side wall of the outer housing such that an internal angle between an internal surface of the at least one side wall and the at least one baffle is in the range of 10 to 85 degrees.

9. The method as claimed in claim 1, wherein steps a-c form an outer side wall and an inner side wall within the outer side wall so as to create the outer housing with a double wall structure and with the at least one baffle monolithically formed with an inner surface of the inner side wall.

10. The method as claimed in claim 1, including a step of forming a fastener half of a quick connect on the part of the suppressor.

11. The method as claimed in claim 10, wherein the fastener half is positioned in an overlap channel formed in the part of the suppressor.

12. The method as claimed in claim 1, including a step of forming ridges on an outer surface of the at least one side wall of the outer housing.

13. The method as claimed in claim 1, including the step of selecting a feed material from the list of: titanium or a titanium alloys, pure titanium (TI), TI6A14V, NITI(45-55NI), TI6A17 MB, TI5A12.5FE, TI3NB13ZR, TI12MO6ZR2FE, NITICU alloys, TI15MO, TI35NB7ZR, 5TA, TI3A1 2.5V, or Inconel.

14. A method of manufacturing at least a part of a suppressor, wherein the suppressor includes an outer housing defining an internal cavity, the outer housing having an end wall and at least one sidewall, an outlet in the end wall for a bullet to exit the suppressor, and at least one baffle within the internal cavity, wherein the method comprises manufacturing the part of the suppressor using selective metal melting by: a. depositing a starter material onto a substrate; b. melting the starter material to form a layer of the part of the suppressor; and c. repeating steps (a) and (b) in a build direction from an end of the at least one side wall so as to form the at least one side wall and the at least one baffle within the internal cavity, with the at least one side wall and the at least one baffle monolithically formed together in a monocoque structure.

15. The method as claimed in claim 14, wherein in step (c) the method comprises repeating steps (a) and (b) in a build direction from an end of the outer housing so as to form the end wall, the at least one side wall, and the at least one baffle within the internal cavity, with the end wall, the at least one side wall, and the at least one baffle monolithically formed together in a monocoque structure.

16. The method as claimed in claim 15, wherein the build direction is from the end wall of the outer housing so as to form the end wall and the at least one side wall extending from the end wall.

17. The method as claimed in claim 14, wherein step c includes forming the at least one baffle within the internal cavity monolithically formed with an inner surface of the at least one sidewall of the outer housing.

18. The method as claimed in claim 14, wherein steps a-c include forming an aperture in the at least one baffle and the outlet in the end wall such that the aperture and outlet are aligned with each other and define a pathway for the bullet to travel through the suppressor.

19. The method as claimed in claim 14, including a step of forming: a fastener integrally to the part of the suppressor to attach the suppressor to an end of a barrel of a firearm, or a fastener half of a quick connect on the part of the suppressor.

20. The method as claimed in claim 14, wherein the at least one side wall comprises a double wall structure comprising an outer side wall and an inner side wall within the outer side wall, and wherein steps a-c form the double wall structure and the at least one baffle with the at least one baffle monolithically formed with an inner surface of the inner side wall.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) Further aspects of the present invention will become apparent from the ensuing description which is given by way of example only and with reference to the accompanying drawings in which:

(2) FIG. 1 is a side “look through” view of a first embodiment of a suppressor according to one aspect of the present invention;

(3) FIG. 2 is a cross sectional view through section C-C in FIG. 1;

(4) FIG. 3 is a cross sectional view of another embodiment of a suppressor according to the present invention;

(5) FIG. 4 is a perspective view of an alternative embodiment of a suppressor according to the present invention;

(6) FIG. 5A is a first end on perspective view of another embodiment of a suppressor according to one embodiment of the present invention;

(7) FIG. 5B is a second end on perspective view of the suppressor shown in FIG. 5A;

(8) FIG. 6 is a cross-sectional view of FIG. 5A;

(9) FIG. 7 is a view of an LMS system for use with the present invention;

(10) FIG. 8 is a flow chart showing the steps that can be used in a method of manufacturing a suppressor;

(11) FIG. 9A is a bottom perspective view of a non-symmetrical suppressor according to another aspect of the present invention;

(12) FIG. 9B is an end on view of the suppressor of FIG. 9A;

(13) FIG. 9C is a side cross sectional view of the suppressor of FIGS. 9A and 9B;

(14) FIG. 9D is a close up end cross sectional view of a suppressor of FIGS. 9A-9C showing the dual wall construction;

(15) FIG. 10A is a side view showing a muzzle brake adjacent to a suppressor with which it is used;

(16) FIG. 10B is a side view showing the muzzle brake and suppressor of FIG. 10A engaged together;

(17) FIG. 10C is a close up side view of the muzzle brake shown in FIG. 10A;

(18) FIG. 10D is a perspective view of the muzzle brake shown in FIGS. 10A-C;

(19) FIG. 10E is a second perspective view of the muzzle brake shown in FIGS. 10A-C;

(20) FIG. 11A is a view showing position of fastener halves of a quick connect prior to engagement;

(21) FIG. 11B is a view of FIG. 11A showing position of fastener halves of a quick connect in an engaged position;

(22) FIG. 12 is a side cross sectional view of a suppressor design that would not successfully build using LMS techniques;

(23) FIG. 13 is a side cross sectional view of a further embodiment of a suppressor according to the present invention

(24) FIG. 14A is a side view of a further embodiment of a suppressor according to the present invention;

(25) FIG. 14B is a side cross sectional view through section A-A in FIG. 14A;

(26) FIG. 14C is a side cross sectional view through section B-B in FIG. 14A;

(27) FIG. 14D is a cross sectional view through section C-C in FIG. 14A;

(28) FIG. 14E is a close up view of the detail D in FIG. 14D;

(29) FIG. 14F is a close up view of detail E in FIG. 14C;

(30) FIG. 15 is a side view of components of a connection system according to an embodiment of the invention;

(31) FIG. 16 is a side cross sectional view of FIG. 1;

(32) FIG. 17 is a side view showing components of a connection system according to an embodiment of the invention secured together;

(33) FIG. 18 is a cross sectional view of FIG. 17;

(34) FIG. 19 is a line through section C-C shown in FIG. 18;

(35) FIG. 20 is an end view of component of a connection system according to an embodiment of the invention;

(36) FIG. 21 is a view through section L-L shown in FIG. 20;

(37) FIG. 22 is a close up view of detail M shown in 21;

(38) FIG. 23 is a side view of FIG. 20;

(39) FIG. 24 is a view through detail K-K shown on FIG. 23;

(40) FIG. 25 is a view through section R-R shown in FIG. 20;

(41) FIG. 26 is a view through section T-T shown in FIG. 25;

(42) FIG. 27 is a close up view of detail U shown in FIG. 26;

(43) FIG. 28 is a side view of components of a connection system according to an embodiment of the invention;

(44) FIG. 29 is a view through section C-C shown in FIG. 28;

(45) FIG. 30 is a view through section F-F shown in FIG. 28;

(46) FIG. 31 is a view through section H-H shown in FIG. 28;

(47) FIG. 32 is a side view of components of the connection system of FIGS. 28 to 31 secured together;

(48) FIG. 33 is a view through section A-A shown in FIG. 32;

(49) FIG. 34 is an end of view of FIG. 32;

(50) FIG. 35 is a close up view of detail B shown in FIG. 33;

(51) FIG. 36 is a view through section E-E shown in FIG. 33;

(52) FIG. 37 is a view through section D-D shown in FIG. 33;

(53) FIG. 38 is a view through section M-M shown in FIG. 37;

(54) FIG. 39 is a side view of components of a connection system according to an embodiment of the invention;

(55) FIG. 40 is a side view of FIG. 39 showing components of the connection system secured together;

(56) FIG. 41 is a view through detail section B-B shown in FIG. 40;

(57) FIG. 42 is a view through section E-E shown in FIG. 40;

(58) FIG. 43 is a view of section J-J shown in FIG. 39;

(59) FIG. 44 is a close up view of detail F shown in FIG. 41;

(60) FIG. 45 is a view of the connection system shown in FIG. 39 after firing of a weapon;

(61) FIG. 46 is a view of detail G shown in FIG. 45;

(62) FIG. 47 is a look-through view of an embodiment of a suppressor according to an embodiment of the invention;

(63) FIG. 48 is a side cross sectional view through the suppressor of FIG. 47;

(64) FIG. 49 is a view through A-A shown on FIG. 48;

(65) FIG. 50 is a view through section C-C shown in FIG. 47;

(66) FIG. 51 is a view through section E-E shown in FIG. 47;

(67) FIG. 52 is a view through section B-B shown in FIG. 47;

(68) FIG. 53 is a view through section F-F shown in FIG. 47;

(69) FIG. 54 is a look-through view of a suppressor according to an embodiment of the invention;

(70) FIG. 55 is a view of through section B-B in FIG. 47;

(71) FIG. 56 is a view through section E-E in FIG. 47;

(72) FIG. 57 is a side cross sectional view of the suppressor of FIG. 47;

(73) FIG. 58 is a view through section A-A in FIG. 57;

(74) FIG. 59 is a view through section C-C in FIG. 58;

(75) FIG. 60 is a view through section H-H in FIG. 57;

(76) FIG. 61 is a view of section G in FIG. 56;

(77) FIG. 62 is a view of section F in FIG. 57;

(78) FIG. 63 is a side view of a gun and connection system according to FIGS. 15 to 27;

(79) FIG. 64 is a close up perspective view of a section of FIG. 63;

(80) FIG. 65 is a side view of part of an alternate connection system according to an embodiment of the invention;

(81) FIG. 66 is an end on view of the connection system of FIG. 65 in a release (unlocked) position;

(82) FIG. 67 is a view through section A-A in FIG. 66;

(83) FIG. 68 is an end on view of the connection system of FIG. 65 in an engaged (locked) position;

(84) FIG. 69 is a view of section B-B in FIG. 68;

(85) FIG. 70 is a first perspective view of a component of an embodiment of the invention;

(86) FIG. 71 is a first side view of FIG. 71;

(87) FIG. 72 is a first exploded perspective view of the components of an embodiment of the invention;

(88) FIG. 73 is a second perspective view of FIG. 73;

(89) FIG. 74 is an exploded view of a connection system according to an embodiment of the invention;

(90) FIG. 75 is an end on view of an assembled connection system according to the embodiment of FIG. 74;

(91) FIG. 76 is a view through section A-A shown in FIG. 75;

(92) FIG. 77 is a view through section D-D shown in FIG. 75;

(93) FIG. 78 is a view through section B-B shown in FIG. 76;

(94) FIG. 79 is a view through section C-C shown in FIG. 76;

(95) FIG. 80 is an end on view of a component of a connection system according to the embodiment of FIG. 75;

(96) FIG. 81 is a side view of FIG. 80;

(97) FIG. 82 is a view through section E-E shown in FIG. 80;

(98) FIG. 83 is a perspective view of a component of connection system according to the embodiment of FIG. 75;

(99) FIG. 84 is a side view of a latching arm forming part of the embodiment of FIG. 75;

(100) FIG. 85 is a second side view of a latching arm;

(101) FIG. 86 is a first perspective view of the latching member of FIGS. 84 to 85;

(102) FIG. 87 is a second perspective view of the latching member of FIGS. 84 to 86;

(103) FIG. 88 is an end on view of a connection system according to an embodiment of the invention;

(104) FIG. 89 is a view through section A-A shown in FIG. 88;

(105) FIG. 90 is a view through section C-C shown in FIG. 88;

(106) FIG. 91 is a view through section B-B shown in FIG. 88;

(107) FIG. 92 is a view through section D-D shown in FIG. 88;

(108) FIG. 93 is an end on view of a second component of the embodiment of FIG. 88;

(109) FIG. 94 is a side view of FIG. 93;

(110) FIG. 95 is a view through section E-E shown in FIG. 93;

(111) FIG. 96 is a perspective view of a latching arm forming part of the connection system of FIG. 88;

(112) FIG. 97 is a bottom perspective view of FIG. 98;

(113) FIG. 98 is a side view of FIG. 96;

(114) FIG. 99 is a second side view of FIG. 96;

(115) FIG. 100 is an end on view of a connection system according to an embodiment of the invention in an unlocked configuration;

(116) FIG. 101 is a view through section B-B shown in FIG. 100;

(117) FIG. 102 is a view through section C-C shown in FIG. 101;

(118) FIG. 103 is a view through section F-F shown in FIG. 101;

(119) FIG. 104 is an end on view of the connection system of FIGS. 100 to 103 in a locked configuration;

(120) FIG. 105 is a view through section G-G shown in FIG. 104;

(121) FIG. 106 is a view through section H-H shown in FIG. 104;

(122) FIG. 107 is a view through section J-J shown in FIG. 105;

(123) FIG. 108 is an exploded parts diagram of the connection system of FIGS. 100 to 107;

(124) FIG. 109 is a perspective view of a latching arm forming part of a connection system of FIGS. 100 to 108;

(125) FIG. 110 is a side view of the latching arm of FIG. 109.

DETAILED DISCUSSION OF THE FIGURES

(126) Throughout the Figures like numerals refer to like components.

(127) Referring first to FIGS. 1 and 2, there is provided a suppressor (1).

(128) The suppressor (1) is manufactured using a selective metal melting technique such as laser metal sintering (“LMS”) techniques as are discussed below.

(129) The suppressor (1) is a monocoque structure with all components formed integrally to at least one other component, therefore together.

(130) The suppressor (1) is a substantially hollow cylinder defined by a continuous side wall (2), a first end wall (3) and a second end wall (4) that define a cavity.

(131) First end wall (3) has an aperture (5) into an overlap channel (6). The overlap channel (6) is configured to receive an end of a gun barrel (not shown).

(132) Second end wall (4) includes an aperture (7).

(133) A pathway, indicted by line (8) extends from aperture (5) through to aperture (7). The diameter of pathway (8) is shown by line (9) in FIG. 2.

(134) A screw thread (10) is provided at end (11) of overlap channel (6). The screw thread (10) is configured to engage with a corresponding screw thread on an end of a gun barrel (not shown in the Figures).

(135) The suppressor (1) has a plurality of internal baffles (12, 13, 14, 15, 16).

(136) The baffles (12-16) separate the cavity in the suppressor into a series of chambers (17, 18, 19, 20, 21, 22). Each of the chambers (17-22) is defined by a baffle (12-16), inner surface (2b) of continuous side wall (2), inner surface (3a) of first end wall (3), and/or inner surface (4a) of second end wall (4).

(137) Chamber (22) acts as a primary blast chamber of the suppressor (1). The primary blast chamber (22) has a larger volume than chambers (17-21).

(138) Each baffle (17-22) includes an aperture (12a-16a) respectively. The apertures (12a-16a) are aligned with each other, and apertures (5, 7). Accordingly, the apertures (12a-16a) are positioned on pathway (8). It is therefore possible for a bullet fired by gun (neither shown) to travel along pathway (8) so as to exit suppressor via aperture.

(139) Referring now to FIGS. 5A and 5B, the suppressor (1) includes a grip in the form of ridges (23) on an outer surface (24) of continuous side wall (2).

(140) The ridges (23) facilitate a person rotating suppressor (1) so as to cause screw thread (10) to engage with a corresponding screw thread on gun barrel (not shown).

(141) Second end wall (4) includes a forming surface indicated as (25). The forming surface (25) is a ring. Inner side (26) and outer side (27) are at an angle to forming surface (25).

(142) An internal angle between an underside of the baffles (17-22) and an imaginary plane (28) from the inner surface (2B) of side wall (2) is indicated by (X). The imaginary plane (28) is substantially perpendicular to an inner surface of continuous side wall (2) and substantially parallel to the build direction.

(143) Baffle Structures

(144) First, Second and Third Alternate Embodiments of Baffle Structures

(145) FIGS. 3, 4 and 6 show views of alternate embodiments of suppressors (29, 30, 31) according to the present invention. Identical numbers are used to refer to the components of suppressors (29-31) in FIGS. 3, 4, and 6 that are the same as the components of suppressor described with reference to FIGS. 1 and 2. However the arrangement/orientation of the baffles differ so as to facilitate provision of a suppressor that may be better suited to use with different types of guns.

Fourth Alternate Embodiment of Baffle Structures

(146) Referring now to FIGS. 9A-9D, showing a further embodiment of a suppressor (40).

(147) The suppressor (40) has a substantially triangular cross section as is best shown in FIG. 9B.

(148) The suppressor (40) has a first end wall (41), a second end wall (42), a first side wall (43), a second side wall (44), and a third side wall (45).

(149) First end wall (41) has an aperture (46) into an overlap channel that is shown as (47) in FIG. 10C.

(150) The first end wall (41), second end wall (42), and side walls (43-45) define a cavity (101).

(151) A passageway, indicated by line (49) in FIG. 9C extends from aperture (46) through the cavity and to an aperture (47) in second end wall (42).

(152) The suppressor (40) has an inner wall (102) and the second wall (103) that collectively form a double wall structure spacers (104) hold the walls (102, 103) apart from each other. There is a space (104) between the walls (102, 103) which acts to limit or reduce heat transfer from cavity (101) to second wall (103).

Fifth Alternate Embodiment of Baffle Structures

(153) Referring now to FIG. 14 which is a side cross sectional view of suppressor (50) according to a fourth embodiment of the present invention.

(154) The suppressor (50) has a housing formed by a continuous side wall (51), a first end wall (52) and a second end wall (53) which collectively define a cavity.

(155) A series of baffles (54-60) are constructed so as to be integral to an inner surface of the side wall (2b). This is as discussed above in relation to FIGS. 13A, 13B, and 13C.

(156) The suppressor (50) includes a series of fins (61-67) within the cavity. The fins (61-67) are all identical to each other and spaced apart along the length of the suppressor (50). Therefore only fin (61) will be described herein.

(157) The bottom edge (68) of fin (61) has no support underneath. Therefore the fin (61) must be constructed out from inner surface (2b) of side wall (2) and downwards. As a result, fin (61) is constructed in a reverse direction e.g. downwards with respect to the build direction.

(158) The fin (61) is generally a spiral that extends along the length of the suppressor (50), that wraps around an inner surface (2b) of the side wall (2). In addition, the spiral twists so that inner edge, being the edge of the spiral closest to the centre line of the suppressor (50) is lower than the corresponding point on outer edge formed integrally to the inner surface of side wall.

(159) The shape and orientation of the fin (61) is such that the angles on side between edges of the fin and the inner wall are not equal, one being less than 90 degrees, and the other being greater than 90 degrees.

(160) The fins (61-67) are orientated so that expansion of gas in the cavity is not initially hindered or obstructed. However, the passage of the gas in the cavity as it returns, to try and exit through aperture (7) is disrupted. Therefore, the fins (61-67) may collectively slow down expansion of gas within the cavity thereby improving the operation of the suppressor (50).

(161) The fins (61-67) also provide reinforcement to the suppressor. This could facilitate thinner side or end walls while still achieving a comparable strength suppressor (50).

(162) The ridges may also increase the rigidity of the suppressor (50) or otherwise reduce/eliminate vibrations in the suppressor during its operation. That could be useful for reducing or eliminating audible noises created during use of a suppressor.

Sixth Alternate Embodiment of Baffle Structures

(163) Referring now to FIGS. 14A-14F showing another embodiment of a suppressor (80) according to the present invention.

(164) Numerals used to describe features of the suppressor (50) are also used to identify similar features of suppressor (80). Therefore, those features will not be described again in relation to FIGS. 14A-14F.

(165) However, suppressor (80) also includes a second fin (62B). The second fin (62B) is orientated counter to the fin (62). Together, the fins (62, 62B) form a double helix extending along the length of the suppressor (80).

(166) The suppressor (80) also includes a plurality of fins (81). The fins are orientated to minimize or reduce their effect on expansion of gases into the chambers in suppressor (80). However, the fins are orientated and configured to hinder, and thereby slow down, the passage of gasses out of the chambers. This is achieved by having the fins orientated so as to allow a clear and uninterrupted passage past the fins (81) as the gas initially expands into a chamber, yet the fins (81) provide a surface against which the expanding gas abuts to thereby create turbulence and slow down the gases expansion.

(167) Therefore, the fins (81) may improve the ability of suppressor (80) to reduce the noise caused by firing a gun with which the suppressor (81) is used.

(168) In the embodiment shown in FIGS. 14A-14F the fins (81) and are at an angle of 60° from the build direction (indicated by arrow 106), and have 60 mm pitch per revolution, a width of 1.55 mm and a thickness of 0.5 mm.

Seventh Alternate Embodiment of Baffle Structures

(169) Referring now to FIGS. 33-39 showing an embodiment of a suppressor (400) having internal baffles (410, 412, 414, 416).

(170) The suppressor (400) is a substantially cylindrical body defined by a first end wall (402), a second end wall (404), and a continuous side wall (406).

(171) The suppressor (400) includes a pathway there through to enable a bullet to travel through the suppressor from first end wall (402) and exit therefrom through an aperture in second end wall (404).

(172) The suppressor (400) may also include a fastener half (not shown in the Figures) to secure the suppressor (400) to a gun barrel (not shown). The fastener half may be any known fastener mechanism, or the connection system described herein.

(173) The suppressor (400) is substantially hollow, having a cavity therein. The cavity however is divided into a series of compartments defined by baffles (410-416).

(174) The baffles (410-416) are non-symmetrical. In addition, each baffle (410-416) includes an aperture which is aligned with the apertures in the end walls. This facilitates a bullet travelling through the suppressor (400).

(175) The baffles (410-416) are formed integrally to an inner surface of the side wall (406). This may be achieved using the techniques discussed in the present Applicant's co-pending New Zealand Patent Application No. 619475.

(176) Each aperture (410-416) is non-perpendicular to the longitudinal axis of the suppressor.

(177) This is best seen in FIG. 38, being a cross sectional view of the suppressor (400). The longitudinal axis of the suppressor (400) is indicated by line (401).

(178) Each baffle (410-416) includes a table face (420-420). Each of the table faces (420-426) are non-perpendicular to the suppressor's longitudinal axis (401).

(179) The orientation and configuration of the apertures (410-416) and the table faces (420-426) may assist in controlling expansion of gases within the suppressor (400). For instance, without being limited to a specific mechanism, the inventor postulates that the orientations of these components may assist in directing expansion of gases created on firing a gun. This may cause or promote the gases to preferentially expand within the suppressor (400) towards first end wall (402) than second end wall (404).

(180) Alternatively, the table faces (420-426) may provide additional structure within the suppressor (400) to hinder or otherwise control expansion of gases therein.

(181) Each table face (420-426) extends from a neck section (430-436) respectively. The neck sections (430-436) may assist in forming the table faces (420-426) in desired orientations using laser metal sintering techniques.

(182) The neck sections (430-436) provide a transition from baffles side walls. The baffles (410-416) are curved, and generally have the shape of a truncated and twisted cone.

(183) Alternate Baffle Structure

(184) Referring now to FIGS. 40 to 48 showing an a suppressor (500) according to an embodiment of the invention.

(185) The suppressor (500) has a composite internal baffle structure with both non-symmetrical and slant baffles.

(186) The suppressor (500) is a substantially cylindrical body defined by a first end wall (502), a second end wall (504), and at least one side wall (506).

(187) The suppressor (500) includes a pathway there through to enable a bullet to travel through the suppressor from first end wall (502) and exit therefrom through an aperture in the second end wall (504).

(188) The suppressor (500) may also include a fastener half (not shown in the Figures) to secure the suppressor (500) to a gun barrel (not shown). The fastener half may be any known fastener mechanism, or the connection system described herein with reference to FIGS. 1-24.

(189) The suppressor (500) is substantially hollow, having a cavity therein. The cavity however is divided into a series of compartments defined by the baffles (510-516).

(190) The baffles (510-518) are non-symmetrical. In addition, each baffle (510-518 includes an aperture (522-530) which is aligned with the apertures in the end walls (502, 504). This facilitates a bullet travelling through the suppressor (500).

(191) The baffles (510-518) are formed integrally to an inner surface of the suppressor (500). This may be achieved using the techniques discussed in the applicant's co-pending New Zealand Patent Application No. 619475.

(192) Each aperture (522-530) is non-perpendicular to the longitudinal axis of the suppressor. This is best seen in FIG. 38, being a cross sectional view of the suppressor (500). The longitudinal axis of the suppressor (500) is indicated by line (501).

(193) Each baffle (510-518) includes a table face (532-540). Each of the table faces (532-540) is non-perpendicular to the suppressor's longitudinal axis (501).

(194) The orientation and configuration of the apertures and the table faces (532-540) may assist in controlling expansion of gases within the suppressor (500). For instance, without being limited to a specific mechanism, the inventor postulates that the orientations of these components may assist in directing the gases. This may cause or promote the gases to expand within the suppressor (500) towards the first end (502 preferentially over second end (504).

(195) Alternatively, the table faces (532-540) may provide additional structure within the suppressor (500) to hinder or otherwise control expansion of gases therein.

(196) Each table face (532-540) extends from a neck section (542-548) respectively. The neck sections (542-548) assist in forming the table faces (532-540) in desired orientations using laser metal sintering techniques.

(197) Neck sections (542-548) extend from baffles (510-518). The baffles are curved, and generally have the shape of a truncated and twisted cone.

(198) Table face (540) provides a slant baffle that extends from the neck section ( ). The table face (540) is formed integrally to an inner surface of side wall (506), for instance at points (560, 562).

(199) A scoop (564) may be formed into baffle wall (570). The scoop (550) may assist with directing expansion of gas in the suppressor (500) to preferentially occur within a chamber (552), rather than a chamber (504).

(200) Muzzle Brake

(201) Referring now to FIGS. 10A-10E showing views of a muzzle brake (70) according to an embodiment of the invention.

(202) The muzzle brake (70) is formed using LMS techniques according to the present inventions and using the method described with reference of FIGS. 7 and 8. All components of the muzzle (70) brake are formed integrally to each one other component.

(203) The muzzle brake (70) includes a screw thread (71). A fastener half forming part of a quick connect is provided by a plurality of detents (72) that extend outwardly from a surface (77) of the muzzle brake (70).

(204) The detents (72) are configured to sit within corresponding slots (73) in a suppressor (74) according to the present invention. Interaction between the detents (72) and the slots (73) secures the muzzle brake (70) and therefore a gun (not shown) to the suppressor (74).

(205) The muzzle brake (70) includes a first stage indicated by (75) and a second stage indicated by (76).

(206) The first and second stages assist in controlling expansion of the gas forming a blast wave on firing of the gun (not shown). The first and second stages each comprise a plurality of slot apertures, which extend along the length of the muzzle brake (70). Each of the apertures is orientated so as to define a “twist”.

(207) The orientation of the twist is chosen to be orientated opposite the rotation of the gasses and spin created by firing a gun with which the suppressor (74) will be used. This helps to tighten the device onto the gun.

(208) To the inventor's knowledge it was not previously possible to manufacture a suppressor having a quick connect inside an overlap channel. This is because prior art manufacturing techniques were not capable of forming a fastener half of a quick connect at the necessary location. As a result, there is a unique advantage provided by use of LMS techniques to manufacture a suppressor according to the present invention.

(209) However, it was not a straight forward process to design and build a muzzle brake in a suppressor using LMS techniques. The inventor solved the problems which prevented manufacture of these products using the inventions described herein. Therefore, the present inventions enabled LMS manufacturing techniques to be utilised in a new and previously unknown application. Accordingly, the inventions facilitate providing an easier way to connect a gun and suppressor together, while allowing a deep over-barrel design yet still controlling the expansion of gases.

(210) It should also be appreciated that designing of the muzzle brake and quick connect to be manufactured by LMS techniques was not straight forward, and a number of issues had to be resolved.

(211) Quick Connect Connection Systems

First Embodiment of a Quick Connect

(212) Referring now to FIGS. 10A-10E, 11A and 11B. The muzzle brake (70) includes detents (72) forming part of a quick connect.

(213) In embodiments where the suppressor (74) is to include a quick connect then a fastener half of the quick connect is formed into the suppressor (74).

(214) In the embodiments shown in the Figures, the fastener half is formed by slots (73) in a lip (76) that is formed integrally. However, other positions for the slots (73) are possible provided that these will align with the detents (72).

(215) Each of the slots (73) includes a spring biased ball bearing (not shown in the Figures).

(216) The spring biased ball bearing is positioned within the slot (73) such that when the detents (72) are positioned within the slots (73), the suppressor (74) and muzzle brake (70) can be moved rotatably with respect to each other. This causes the detents (not shown) to slide within slots (73) and into a locking position. The locking position is shown in FIG. 11A. In the locking position, each spring biased ball bearing (not shown) bears against an edge of a detent (not shown). This provides resistance force to detents (72) moving within slots (73). Therefore, the spring loaded ball bearing secures the muzzle brake (70) and suppressor (74) with respect to each other.

(217) However, the spring is not so strong that it cannot be overcome by force applied by a user that causes the muzzle brake (70) and/or suppressor (74) to rotate with respect to each other.

(218) The non-locking position is shown in FIG. 11A. In this, the spring loaded ball bearing (not shown) does not bear against detents (72). Therefore the detents (72) can be moved from the slot (73) so as to separate the muzzle brake (70) in the suppressor (74).

First Alternate Embodiment of a Quick Connect

(219) Referring now to FIGS. 15 to 27 showing a connection system indicated generally by (700), and which is configured to provide a quick connect to secure a gun (not shown in FIGS. 15 to 27) to a suppressor (710).

(220) The connection system (700) includes a first connector half in the form of a muzzle brake indicated as (707). The muzzle brake (703) includes a body (704) that has in general a cylindrical shape and is hollow.

(221) Protrusions (705, 706, and 707) extend from the outer surface of the body (704). Each protrusion (705-707) has a first surface (705A, 705B, 705C) and a second surfaces (705A, 705B, 705C) respectively. The first surfaces (705A, 705B, 705C) provides a front face, being the face which is distal to the gun in use. The second surfaces (5B, 6A, 7B) provides a rear face being the face which is closest to the gun in use.

(222) The body (704) includes an aperture (708) configured to receive an end of a gun barrel (not shown in the Figures). An internal screw thread (710) inside the body (704) is configured to engage with a corresponding screw thread on the gun barrel (not shown in the Figures). The engagement of the screw threads secure the muzzle brake (703) to the gun.

(223) A section (711) of the body (704) includes a radially spaced aperture (712). The apertures (712) are orientated to generally extend along the length of the body (704).

(224) The apertures (712) are also orientated so that they twist around the circumference of the body (704). The orientation of the twist is selected to be counter (opposed) to the direction of the screw thread (710). Thereby, the apertures (712) may provide resistance to assist in preventing the muzzle brake (703) loosening from the gun barrel during use.

(225) The connection system includes a second connector half that comprises a first component (713) and a second component, which is indicated as (714) in FIG. 24.

(226) The first component (713) includes radially spaced flanges (723, 724, 725) as are best shown in FIG. 24.

(227) The separation between side edges of the flanges (723, 724 and 725) define channels (726, 727, and 728). The channels (726-728) have a shape corresponding to protrusions (705-707) on the muzzle brake (703). Therefore, inserting the section (711) through the aperture (729) enables the protrusions (705-707) to be passed through the channels (726-728).

(228) The flanges (723-725) have an outer surface (730, 731, 732) respectively and an inner surface (733, 734 and 735) respectively.

(229) The first component (713) has a body (718) having a circular aperture (729) there through. An external screw thread (719) is formed on the body.

(230) The second component (714) includes an aperture (715). Therefore, the section (711) can be inserted through the aperture (715) so as to be positioned inside the suppressor (702). This position is as shown in FIG. 18.

(231) An internal screw thread (716) is formed integrally the suppressor (702) towards the opening (715). Ratchet teeth (717) are formed inside the suppressor (702) immediately inside aperture (715). The ratchet teeth (717) extend around the entire circumference of aperture (715).

(232) The screw threads (719, 716) are reverse screw threads. Therefore, rotation of the first component (713) in an anti-clockwise direction when viewed from the orientation of FIG. 6 will cause the screw threads (716, 719) to engage each other so to secure the first component and second component (713,714) together. Rotation of the first component (713) in an anti-clockwise direction as viewed in FIG. 20 will cause the screw threads (716, 719) to disengage to release the first component (713) from the second component (714).

(233) The first component (713) includes at least one ratchet member (720). The ratchet member (720) is integrally formed to the second component. This forms a biasing element which is configured to urge the ratchet member (720) towards a position in which it will engage ratchet teeth (717) when screw threads (716, 179) engage each other. The engagement of one or more of the teeth (717) by the at least one ratchet member (720) provides resistance to rotation of the first component (713) and the second component (714).

(234) However, the ratchet member (720) can be moved to a release position in which it disengages ratchet teeth (717) to thereby allow rotation of the first and second components (713, 714) with respect to each other.

(235) The second component (714) has a plurality of protrusions (780-782). The protrusions (780-782) define recesses (783-785). The recess (783-785) have a shape which each corresponds to the shape of one of the protrusions (705, 706 or 707).

(236) An aperture (722) in the second component (714) enables the section (711) to be moved past the bearing surface (721) to be disposed inside the suppressor (702).

(237) The first component (713) includes a bearing surface (721). The bearing surface (721) is a section of a cone that is concentric with the suppressor (702).

(238) The bearing surface (721) provides an angled surface against which the surfaces (705A, 706A, 707A) of the protrusions bear when the connection system (700) is assembled.

(239) The inner surfaces (733-735) provide clamping surfaces which in use cooperate with bearing surface (721).

(240) In addition, the outer surfaces (730-731) provide clamping surfaces which in use cooperate with second surfaces (705B, 706B, 707B).

(241) The second surfaces (705B, 706B, 707B) are not perpendicular to the longitudinal axis of the muzzle brake (703). Preferably, the second surfaces (705B, 706B, 707B) are at angle in the range of 15°-65°, and more preferably 45° to the longitudinal axis of the muzzle crake (703).

(242) In addition, the inner surfaces (733-735) are at an angle to the longitudinal axis of the suppressor. The angle substantially corresponds to the angle of the second surfaces (705B, 706B, 707B). This may facilitate the inner surfaces (733-375) providing a clamping force against the second surfaces (705B-707B). This may be beneficial to facilitate an efficient clamping action for the connection system (1).

(243) Referring now to FIGS. 70-73.

(244) The first and second components (713, 714) may have double helix screw threads. That is, each screw thread (718, 719) may be formed from a pair of intertwined screw threads, which may be generally described as a double helix. The screw threads are labeled as (716A, 716B) and (719A, 719B) respectively.

(245) Each screw thread (716A, 716B, 719A, 719B) has a start point (716C, 716D) and (719C, 719D) respectively. The start points (716C, 716D) and (719C, 719D) are positioned at distal sides of the apertures. That is, the start points (716C, 716D) and (719C, 719D) are 180° apart.

(246) The use of double helix screw threads increases the surface area contact between the first component (713) and the second component (714) when the screw threads are engaged. As a result, the first component (713) and the second component (714) can be secured to each other with fewer rotations of the screw threads, whilst still achieving a desired surface area contact between the two components.

(247) The connection system (700) can be used to secure a gun (not shown) to the suppressor (702). To do so, the muzzle brake (703) is first secured to the gun (not shown) using screw thread (710). The first component (713) is secured to the suppressor (702) by inserting body (718) into aperture (715). The first component (713) and suppresser (702) are rotated with respect to each other so as to cause the screw threads (716, 719) to engage each other. In doing so, ratchet teeth (717) are engaged by ratchet member (720).

(248) Section (711) is inserted through aperture (729), body (718), and aperture (722). The section (711) is therefore disposed inside the suppressor (702). In doing so, the protrusions (5-7) pass through the channels (726-728). The protrusions are inserted into the recesses.

(249) The first component (713) is rotated with respect to the muzzle brake (703). This causes the protrusions (705-707) to be brought out alignment with the channels (725-727). In other words, the channels (725-727) rotate and therefore the protrusions are no longer completely aligned with the channels (725-727).

(250) The inner surfaces (733-735) each lie on a plane that is obtuse to a plane on which the bearing surface (721) lies. Accordingly, as the first component (713) is rotated with respect to the muzzle brake (703) and also therefore the second component (714), the inner surfaces (733-735) and bearing surface (721) interact to clamp the protrusions (705-707).

(251) When rotation of the first component (713) is stopped, the ratchet member (720) engages at least one of the ratchet teeth (717) to which it is adjacent. Accordingly, the ratchet member (720) and ratchet teeth (717) prevent the second component (714) and the muzzle brake (703) from rotating with respect to each other. The ratchet provides a locking mechanism to prevent inadvertent misalignment of the suppressor (702) with the muzzle brake (703) and thereby also with the gun.

(252) Having a plurality of radically spaced protrusions e.g., at least two or preferably three protrusions, may assist to more evenly distribute clamping force.

(253) To release the suppressor (702) from the muzzle brake (703) a disengagement mechanism is used.

(254) In the embodiment of FIGS. 15 to 20, 72 and 73, the disengagement mechanism is provided to the second component (714) in the form of a ring (736). The ring (736) can rotate with respect to the second component through approximately 45 to 180 degrees, and preferably 60 degrees.

(255) The ring (736) includes a protrusion (737) per ratchet member (722). Rotation of the ring (736) with respect to the body (718) causes each protrusion (737) to contact an end (720A) of a ratchet member (720). The contact moves the at least one ratchet member (720) to a position in which it disengages any ratchet teeth (717) with which it may have been engaged.

(256) The ring (736) and protrusion (737) are visible in FIGS. 72 and 73 which show interaction of the protrusion (737) with the at least one ratchet member (720).

(257) Once the at least one ratchet member (720) has disengaged the ratchet teeth (717), continued rotation of the ring (736) causes body (718) to also rotate. Thereby, channels (733-735) are brought into alignment with protrusions (705-707). Accordingly, the bearing surface (721) and inner surfaces (733-735) do not clamp the protrusion (705-707) to the suppressor (702). Accordingly, the muzzle brake (703) can be moved to cause the protrusions (705-707) to move through channels (726-728). Thereby, the muzzle brake (703) can be released from the suppressor (702). This facilitates removing the suppressor (702) from a gun (not shown).

(258) It should be noted that the configuration of the connection system (700) is such that the components need only be rotated through a small range of angles to secure and release the two components together.

Second Alternate Embodiment of a Quick Connect

(259) Referring now to FIGS. 28 to 38 showing an embodiment of a connection system generally indicated as (200).

(260) The connection system (200) includes a first connector half in the form of a muzzle brake indicated generally as (207).

(261) The muzzle brake (207) includes a main body (208).

(262) An internal screw thread (210) is formed the body (208). The screw thread (210) is configured to in use engage with the corresponding screw thread on the end of a gun barrel (not shown in the Figures).

(263) The interaction of the screw thread (210) and a corresponding screw thread on the gun barrel can in use secure the muzzle brake (207) to the gun.

(264) The muzzle brake (207) may include apertures such as (211) which are shaped and configured so as to control or otherwise direct expansion of gasses when a bullet is fired by a gun.

(265) The connection system (200) comprises a second connector half generally indicated as (213). The second connector half (213) is formed from a first component indicated as (202), and a second component (220).

(266) The second component (220) includes a main body (230). The main body (230) includes an aperture (232) into a channel (240), as is best seen in FIG. 16.

(267) The second component (202) is formed integrally in a gun suppressor (not shown in FIGS. 28 to 38). The gun suppressor (not shown in FIGS. 28 to 38) may be a suppressor having any known internal baffle structure.

(268) The second component (202) includes an aperture indicated generally as (203) into a channel.

(269) The aperture (203) is configured to receive components of a gun and/or other aspects of the connection system (200).

(270) The second component (202) includes an internal screw thread (201) within the channel (204). A plurality of ratchet teeth (200) are formed integrally to the second component (202), within channel (204) and close to aperture (203).

(271) The first second component (2202) includes an external screw thread (250) formed in the main body (13). The external screw thread (250) corresponds to internal screw thread (203) in the first component (202).

(272) Rotation of the first component (220) and the second component (202) with respect to each other causes screw threads (201, 250) to engage to secure the two components together.

(273) The first component (220) includes at least one, and preferably, three flanges (260, 262, 264). Each flange (260, 262, 264) includes a first surface (260A, 262A, 264A) and a second surface (260B, 262B, 264B).

(274) The gaps between adjacent flanges (260, 262, 264) define channels (266). The channels (266) are configured to receive the protrusions (209) on the muzzle brake (207).

(275) The first component (220) includes two ratchet members (270A, 270B). The ratchet members (270A, 270B) are spring biased protrusion that each have at least one tooth. Pressure applied to the ratchet members (270A, 270B) at engagement points (242, 244) causes the ratchet teeth (272) to more towards the main body (230). This causes the ratchet members (270A, 270B) to disengage any ratchet teeth with which they may be engaged.

(276) The protrusions (209) are substantially identical to the protrusions (5, 6, 7) discussed above with respect to FIGS. 1-13. Accordingly, the shape, configuration, and role of the protrusions (209) will not be discussed herein. It should also be appreciated that the function of connection system (200) is substantially identical to that of connection system (1) as discussed above.

(277) However, a separate disengagement means in the form of a ring is not provided. Rather, the disengagement means is integrally formed to the first component (220) forming part of the first connector half in the form of the ratchet members (270A, 270B).

(278) The engagement points (240, 242) are provided to enable a person to move the ratchet members (270A, 270B) to a release position in which they do not engage ratchet teeth (17). Accordingly, pressure applied to engagement portions (240, 242) overcomes the biasing elements to move ratchet members (270A, 270B) away from ratchet teeth.

(279) Third Alternate Quick Connect

(280) Referring now to FIGS. 65 to 73 showing a connector half (600) of a connection system according to an embodiment of the invention.

(281) The connector half (600) includes a body (602) having a generally cylindrical shape and being hollow. The connector half (600) includes a first aperture (604) and a second aperture (606). The apertures (604, 606) are aligned with each other and define a pathway along which a bullet may travel in use.

(282) The connector half (600) may be incorporated into a suppressor (not shown in FIGS. 65 to 73). In such embodiments, the body (602) is provided by the suppressor.

(283) A track (610) is formed in an outer surface (612) of the body (602). A latch (614) is slidingly mounted in track (610). The latch is connected to a first latching member (616) and a second latching member (618).

(284) Body (602) includes an internal radial surface (618). Each latching member (616, 618) is pivotally mounted to body (602) at pivot points (620). The separation between the radial surface (619) and an underside (not visible in the Figures) of the latching members (616, 618) define a track (622) to receive protrusions on a second connector half such as that on a gun barrel or muzzle brake (not shown in the Figures).

(285) The protrusions on the gun barrel or muzzle brake (not shown) provide a connector half complimentary to connector half (600). Interaction of the connector half (600) with the protrusions (not shown) can secure a suppressor to a gun (neither shown).

(286) In use, sliding the latch (614) along the track (610) causes the latching members (616, 618) to be moved to a release (non-locking) position. This opens channels (624, 626) which are shaped and configured to receive the protrusions (not shown). This enables the protrusions to be brought into alignment with the track (622).

(287) Sliding the latch along the track enables the latching members to reduce the dimensions of the channels (624, 626). Thereby, the protrusions can be secured in the track (622) to attach the suppressor to a gun.

(288) To release the suppressor from the gun the above described process is reversed. That is, the latch (614) is moved slidingly along track (610) to increase the size of channels (624, 626). The protrusions can be withdrawn from the track (622) to release the gun and suppressor from each other.

(289) Fourth Alternate Quick Connect

(290) Referring now to FIGS. 74 to 87 which show a fourth embodiment of a connection system (1000) according to an embodiment of the invention. The connection system (1000) includes a first component which is formed integrally to a suppressor (1010). The first component includes an internal screw thread (1012), which may be a pair of intertwined screw threads which can be described as a double helix.

(291) A second component (1020) has an external screw thread (1022), which may be a double helix as described above. The screw threads (1012, 1022) are configured to engage with each other.

(292) The first component has an internal shoulder (1014) and at least one column (1016) extending therefrom.

(293) The first component (1010) and the second component (1020) have corresponding teeth (not shown) and ratchet members (1024). The ratchet members (1024) can engage the teeth (not shown) to prevent or restrict rotation of the first component (1010) and the second component (1020) with respect to each other.

(294) At least one latching arm (1030) is pivotally mounted to first component (1010), such as by an aperture (1032) which receives the columns (1016).

(295) A ring (1050) is provided which can facilitate rotating the second component (1020) with respect to the first component (1010). The ring (1050) provides a sheath that at least partly surrounds the second component (1020).

(296) In the embodiment shown in FIGS. 75-88, the ring (1050) and the second component (1020) include a plurality of intermeshed teeth which are indicated generally as (1052). The teeth have a small degree of play e.g. the teeth of the ring are larger than the teeth of the teeth of the second component (1052) for e.g., 2 mm. This enables the ring (1050) to rotate slightly relative to the second component (1020) without causing the second component (1020) to move.

(297) However, the intermeshed teeth (1052) enable rotation of the ring (1050) to cause a corresponding rotation in the second component (1020). For instance, rotation of the ring (1050) in a first direction may cause the second component (1020) to rotate to move towards the first component (1010). Likewise, rotation of the ring (1050) in a second direction may cause the second component to rotate to move away from the first component (1010).

(298) The ring (1050) includes disengagement structure (not shown in the Figures) which can engage the ratchet members (1016) to cause them to disengage the teeth (not shown) on the first component (1010) on rotation of the ring (1050) in at least the first direction. Therefore, the ring (1050) is configured to ensure that the ratchet members (1016) do not prevent the first component (1010) and the second component (1020) being rotated relative to each other when desired. However, the ratchet members (1016 are still able to prevent unintentional or undesired rotation of the first component (1010) and the second component (1020) relative to each other.

(299) The embodiment of FIGS. 75 to 88 is configured to engage tracks (1060) provided on a gun (not shown in the Figures) so as to secure the suppressor (1010) to the gun (not shown).

(300) In the embodiment, the tracks (1060) are provided in a flash hider (1062) as should be known to one skilled in the art. The flash hider (1062) has an internal screw thread (1064) which is configured to engage a corresponding screw thread on a gun (not shown in the Figures).

(301) To secure the suppressor (1010) to the gun, the flash hider (1062) is inserted through apertures in the second component (1020), the ring (1050), and disposed in the suppressor (1010). The ring (1050) is rotated in a first direction. The intermeshed teeth (1052) transfer rotation of the ring (1050) to the second component (1020).

(302) Ridges (1028) on the second component (1020) contact latching arms (1030) and transfer the rotational motion of the second component to the latching arms (1030). The latching arms (1030) are caused to pivot about columns (1016). The latching arms (1030) therefore each extend into one of the tracks (1060).

(303) The latching arms (1030) may be shaped or configured to mate with structure of the flash hider (1062) forming the tracks (1060). This may ensure that the latching arms (1030) and therefore the connection system (1000) more stably and/or reliably connects the gun to the suppressor (1010).

(304) A clamping surface (1026) of the second component (1020) presses against the latching arms (1030). This may assist with retaining the latching arms (1030) in engagement with the tracks (1060).

(305) To release the suppressor (1010) from the gun (not shown) the ring (1050) is rotated in the second direction. The disengagement structure on the ring (not shown) causes the ratchet members (1016) to disengage the teeth on the first component (not shown). The intermeshed teeth (1052) transfer rotation of the ring (1050) to the second component (1020), causing the clamping surface to disengage the latching arms (1030).

(306) Ridges (1029) on the second component (1020) engage the latching arms (1030) and transfer rotational motion of the second component (1020) to the latching arms (1030). This causes the latching arms (1030) to pivot about columns (1016) to disengage the tracks (1060). The flash hider (1062) can therefore be withdrawn from the suppressor.

(307) Fifth Alternate Quick Connect

(308) Referring now to FIGS. 89 to 99 which show a connection system (1100) according to an embodiment of the invention. The connection system is a variation of the embodiment described with reference to FIGS. 74 to 88, and therefore like references in the Figures refer to like components.

(309) In the embodiment shown in FIGS. 88 to 99 the latching arms (1070) are slidingly mounted in channels formed in the suppressor (1010). The second component (1020) includes a clamping surface (1080). In use, rotation of the second component (1020) in a first direction causes the clamping surface (1080) to abut a surface (1036) on the latching arms (1030).

(310) The clamping surface (1080) is angled inwards to create a taper towards the center of the second component (1020), as is best seen in FIG. 95. The surface (1036) on the latching arms (1030) is angled to create a taper as is best seen in FIG. 97.

(311) The clamping surface (1080) forces the latching arms (1030) towards each other. This causes a collar (1038) on each latching arm (1030) into the recess (1060) on the flash hider (1062).

(312) The collars (1038) on the latching arms (1030) cooperate to form a seal around the diameter of the flash hider (1062). Therefore, the connection system may reduce or eliminate blow back from inside the suppressor (1020) towards a gun user.

(313) To release the suppressor (1010) from a gun, the ring (1050) is rotated in a second direction. To release the suppressor (1010) from the gun (not shown) the ring is rotated in the second direction. The disengagement structure on the ring (not shown) causes the ratchet members (1016) to disengage the teeth on the first component (not shown). The intermeshed teeth (1052) transfer rotation of the ring (1050) to the second component (1020), causing the clamping surface to disengage the latching arms (1030).

(314) A biasing means (not shown in the Figures) such as one or two springs may be provided. The biasing means are positioned and orientated to urge the latching arms (1030) apart, and towards an open position. However, contact of the clamping surface (1080) against the surface (1036) can overcome the biasing means to enable the latches to move into the recess (1060) to thereby secure the suppressor (1010) to a gun (not shown).

(315) Sixth Alternate Quick Connect

(316) Referring now to FIGS. 100 to 110 which show an alternate connection system (1200) according to an embodiment of the invention. The connection system (1200) uses similar components to the connection system discussed above. Accordingly, similar references numerals in the Figures refer to similar components.

(317) The connection system (1200) is configured to connect a suppressor (1210) to a gun (not shown in the Figures) which is provided with a single protrusion (1212) which extends around the entire circumference of a gun barrel (not shown in the Figures). For instance, as shown in the Figures, the single protrusion (1212) is provided on a muzzle brake (1214).

(318) The muzzle brake (1214) includes a screw thread (1216) which can engage a corresponding screw thread on a gun barrel (not shown) to releasably connect the muzzle brake (1214) to the gun barrel.

(319) Alternatively, it is envisaged that the single protrusion (1212) could be formed integrally to, or be otherwise permanently attached to, the gun barrel.

(320) The single protrusion (1212) has a first shoulder (1211) and a second shoulder (1218). The shoulders taper (1211, 1218) inwards to provide a ridge (1219). The ridge (1219) extends around the entire circumference of the muzzle brake (1214). Therefore, the single protrusion is distinct to the embodiments discussed above in which a plurality of protrusions were provided.

(321) The suppressor (1210) includes a shoulder (1211) which in use provides a clamping surface.

(322) The connection system (1200) includes a second component (1220) having an external screw thread (1222) configured to engage a corresponding internal screw thread on the suppressor (1210).

(323) The connection system (1200) includes at least one, and preferably two, latching arms (1230, 1232). The latching arms (1230, 1232) are configured to engage the single protrusion (1212). The latching arm(s) (1230, 1232) are positioned between shoulder (1211) and the second component (1220).

(324) Each latching arm (1230, 1232) includes a detent (1234). The detents (1234) are each slidingly engaged in one of tracks (1238, 1240) formed in shoulder (1211).

(325) The tracks (1238, 1240) are shaped to guide movement of the latching arms (1230, 1232) between a locked position in which they clamp a gun barrel to the suppressor (1210) and a release position in which they enable the protrusion to be inserted into or removed from the suppressor (1210). The locked position is shown in FIGS. 100-103 while the release position is shown in FIGS. 104 to 107.

(326) Each latching arm (1230, 1232) includes a shoulder (1242, 1244). The shoulders (1242, 1244) are configured to abut an internal clamping surface (1223) on the second component (1220) in use.

(327) To secure a gun (not shown) to the suppressor (1210) the single protrusion (1212) is inserted through apertures in the second component (1220) and into suppressor (1210). The shoulder (1217) is adjacent the shoulder (1213) and ridge (1219) is between the latching arms (1230, 1232) and the shoulder (1211). The second component is rotated in a first direction with respect to the suppressor (1210), this causes clamping surface (1213) to move towards shoulder (1211).

(328) The clamping surfaces (1213) abut the shoulders (1242, 1244). The contact causes the latching arms (1230, 1232) to move radially inwards towards a central axis of the suppressor e.g., the collars on the latching arms move towards each other. The movement of the latching arms (1230, 1232) is guided by the detents moving within the tracks.

(329) Continued rotation of second component (1220) causes the latching arms (1230, 1232) to push single protrusion (1212) towards shoulder (1213).

(330) The connection system is structured to create a seal to provide resistance to, or prevent, blow back of gas from within the suppressor (1210) towards the gun barrel.

(331) The seal may be created by various structures and/or configurations. In one embodiment, the latching arms are shaped and configured so that each end or a collar touches an end of another collar. For instance, in these embodiments, the collars may touch. In addition or alternatively, the latching arms may overlap each other.

(332) To release the suppressor from the gun, the above steps are reversed. For instance, the second component (1220) is rotated in a second direction. This causes detents to move along tracks, to guide the latching arms radially outwards.

(333) The connection system (1200) may also be provided with a biasing means such as a spring (not shown). The biasing means can be configured to urge the latching arms apart from each other. Therefore, the biasing means can ensure that the latching arm(s) are moved towards an open position in which they do not restrict or prevent the muzzle brake being inserted into, or removed from, the suppressor (1210). Accordingly, the biasing means may make it easier to connect and release a suppressor from a gun.

(334) However, in these embodiments, rotation of the second component (1220) can overcome the biasing means to move the latching arms to a locked position. As a result, the biasing means do not prevent assembly of a system as described herein.

(335) Also, as indicated, the connection system (1200) may include structure or visual indications that inform a user which direction a component should be rotated to secure a suppressor to, or release it from, a gun.

(336) Nielson Decoupler

(337) Referring now to FIGS. 39 to 46 showing a suppressor (300) according to an alternate embodiment of the invention.

(338) The suppressor (300) includes a Nielson decoupler configured to at least partially reduce transfer of momentum to a firearm to which the suppressor (300) is secured in use. The momentum may be transferred by gas created on firing a firearm contacting baffles within the suppressor (300). However, the Nielson decoupler provides a mechanism to absorb at least a portion of the momentum transferred to the suppressor (300) in use and thereby reduce the energy which may be transferred to the firearm.

(339) The suppressor includes a piston (320). The piston (320) includes screw thread (322) configured to engage a corresponding screw thread on a gun barrel (not shown in the Figures) to thereby facilitate securing the suppressor (300) to a gun (not shown). The piston (320) includes a body (330) which has a general cylindrical shape and is hollow. Therefore, the body (330) defines a passageway through which a bullet may travel.

(340) The body (330) includes radially spaced apart slot apertures (340).

(341) Protrusions (350) extend from the body (330). The protrusions (350) define peaks and troughs as are best seen in FIG. 29. The suppressor (300) is a cylindrical body having an internal cavity. Baffles (not shown in the Figures) are secured within the suppressor (300).

(342) The body (330) includes a second series of radially spaced apart slot apertures (352). The slot apertures (352) are orientated to “twist” around the circumference of the body (330).

(343) The suppressor (300) may have any known internal baffle structure, or utilize baffle structures discussed herein.

(344) The suppressor (300) has a first opening (302) and a second opening (304).

(345) The suppressor (300) includes an internal screw thread (309) as is best seen in FIGS. 30 and 32. The screw thread (354) is configured to engage with a corresponding screw thread (356) on a locking nut (360).

(346) A channel is defined by a channel wall (354) that extends from internal screw thread (354) towards an end (360) of suppressor (300).

(347) Channel end wall (368) extends away from channel wall (364).

(348) The channel end wall (368) includes a circular aperture (not labeled in the Figures). The circular aperture has a shape and size corresponding to the diameter of body (330) so that the body (330) can move through the aperture.

(349) To assemble the Nielson decoupler (320), an absorber in the form of a compression spring (370) is provided. In use, the spring (370) at least partially absorbs the gas force against the baffles created on firing of the gun. The compression spring (372) is positioned around the body (330) to bear against a side of the protrusions (350).

(350) The piston (320) is inserted through the opening, moved along the channel, and through the circular opening (not labeled) in the channel end wall (364).

(351) The locking nut (380) is positioned about body (330) and rotated so that screw threads (356, 322) engage each other. This secures the piston (320) to the body (330).

(352) This configuration is shown in FIG. 30 e.g. the spring (370) is not completely or substantially compressed. In other words, in this configuration the spring (370) can still be further compressed if sufficient force is applied thereto.

(353) Referring now to FIGS. 27 & 30-32.

(354) FIGS. 27 and 30 show views of the suppressor (300) with the spring (370) in an unloaded (non-compressed) configuration. This is the normal configuration.

(355) However, on firing of a gun (not shown) to which the suppressor (300) is secured, expansion of gases within the suppressor (300) provides an urging force to move the suppressor (300) in the direction shown by arrow X in FIGS. 31 and 32. The urging force causes an end (30) of suppressor (300) to move along the length of body (300). It should be noted that locking nut (360) moves at a corresponding rate to end (30). This is because the locking nut (300) is not fixedly attached to the body (330).

(356) In-effect, channel (362) enables the separation between locking nut (360) and the protrusions (350) to be decreased. This compresses the spring (307) between the locking nut (360) and the protrusions (350). Therefore, the spring (370) can absorb gas forces imported to the suppressor (300) on firing of the gun (not shown).

(357) The spring (370) provides an urging force to move suppressor in a direction opposite to arrow X shown in FIGS. 31 and 32.

(358) The protrusions (350) provide an alignment function. That is, the protrusions (350) touch, and can slide along, an inner surface of channel wall (368) irrespective of the compression of spring (360).

(359) The protrusions are also positioned with respect to the screw thread (350) to provide an alignment function. That is, the protrusions (350) will help to ensure that the suppressor body (300) does not dip or droop which would cause it to be misaligned with the piston (320) and thereby is substantially maintained in alignment with the gun barrel (not shown in the Figures).

(360) Method of Manufacture

(361) Different products according to the present invention can be manufactured using the same method. Accordingly, one method of manufacturing a product is described herein.

(362) The method is performed using an additive layering manufacturing system, the representative components of which is indicated as (32) are shown in FIG. 7.

(363) The system (32) includes a computer programming apparatus (33) as should be known to one skilled in the art. The computer programming apparatus is programmed to perform any of all of the steps of the method described herein. In addition, the apparatus is programmed to, or may be configured to, performs steps in the method so as to manufacture the embodiments of the suppressors described herein.

(364) The computer programming apparatus (33) is configured to communicate with a laser metal sintering (“LMS”) apparatus (34).

(365) Operation of the LMS apparatus (32) is as should be known to one skilled in the art, and therefore the specifics of the method are not reiterated here. However, parameters such as selection of the starter material, temperature required to achieve necessary fusing of layers of particles of starter material etc. are as known to one skilled in the art.

(366) Referring now to FIG. 8 showing a schematic of the steps involved in manufacturing a product according to the present invention.

(367) At step (35) an electronic model of a suppressor is created using a modelling package such as CAD Solid Works on computer programming apparatus (33).

(368) Developing the CAD model involves the step of determining a build direction for the product. The build direction is an orientation for a product to be manufactured such as a suppressor with respect to a substrate in the LMS Apparatus (34). The build direction defines the order in which layers of the powdered material are deposited and sintered so as to form the product.

(369) In a preferred embodiment, the build direction requires building a suppressor such as (1) from the second end wall (4).

(370) Developing the model of a product to be manufactured involves the step of determining the angle between various components. For instance, in manufacturing a suppressor (1), a person would determine the angle between an underside of a baffle and a substantially horizontal plane (28).

(371) In addition, internal structures inside a cavity in the product are determined. These will depend on the shape and configuration of the product to be produced. The features of the components are selected according to the relationships described herein so as to ensure that the product can be manufactured using the LMS apparatus.

(372) At step (36) the CAD model is separated into a number of layers of a nominal thickness between 0.01 mm-0.03 mm.

(373) The model and information on the layers is transmitted from the computer programming apparatus (33) in which the model is created to the LMS apparatus (34).

(374) At step (37) a build substrate (not shown) in the Figures is provided in the LMS apparatus (34).

(375) The substrate provides a surface on which the product can be manufactured.

(376) At step (38) the LMS apparatus (34) applies a layer of a titanium oxide alloy in a powder form onto the substrate. A laser (not shown) forming part of the LMS apparatus (34) selectively applies a laser beam to portions of the layer of titanium oxide powder deposited on the substrate (not shown). This causes the laser to selectively heat the titanium oxide powder so as to fuse adjacent particles together. The laser heats a portion of the layered titanium oxide powder corresponding to a first layer of the model of the product generated at step (35). This forms a first sintered layer.

(377) At step (39) a wiper (not shown in the Figures) forming part of the LMS apparatus (34) is used to apply another layer of titanium oxide powder on top of the first sintered layer.

(378) This corresponds to the second layer of the CAD model generated at step (36).

(379) Steps (38 and 39) are repeated so as to substantially form the product.

(380) The formed product can be removed from the LMS apparatus (34) and separated from the substrate (not shown).

(381) Unsuccessful Suppressor Design

(382) Referring now to FIG. 12 showing a suppressor (94) that is unlikely to be successfully manufactured using LMS techniques.

(383) The suppressor (94) is designed so that build direction indicated by arrow (95) in FIG. 12 starts from second end wall (4).

(384) The baffles (12-14) would build successfully.

(385) However, the suppressor (94) includes a shelf (96).

(386) The angle (X) between an underside (97), of shelf (96) and an inner wall (2B) of the suppressor is substantially 90 degrees.

(387) As a result, there is insufficient support for layers of the powdered feed material deposited through a manufacturing of the suppressor (94). As a result, the shelf (96) would not successfully build using an LMS technique.

(388) In addition, the shelf (96) and baffle (14) integrally joined to the shelf (96), have different thicknesses. This is necessary to try to ensure that sufficient material is deposited to enable building of a subsequent baffle up from the shelf (96). However, the different thicknesses lead to thermal gradient throughout the components of the suppressor (94). Those thermal gradients are a result of parameters of the LMS apparatus (34) being fixed (invariable) during the manufacturer of a particular part. As a result, it is not possible to vary the amount of energy which laser of the LMS apparatus (34) imparts to different parts of the suppressor (94) during its manufacture. As a result, the parameters of the laser are often selected so as to provide an average suitable for use in preforming all parts of the suppressor any given part. However though, the average chosen will not work with all particular components, meaning that selection of design features is particularly important to successfully building of suppressors.

(389) Aspects of the present invention have been described by way of example only and it should be appreciated that modifications and additions may be made thereto without departing from the scope thereof as defined in the appended claims.

(390) While the invention has been described in connection with what are presently considered to be the most practical and preferred embodiments, it is to be understood that the invention is not to be limited to the disclosed embodiments. On the contrary, it is intended that the specification covers various modifications and equivalent arrangements included within the spirit and scope of the invention. Also, the various embodiments described above may be implemented in conjunction with other embodiments, e.g., aspects of one embodiment may be combined with aspects of another embodiment to realize yet other embodiments, Further, each independent feature or component of any given assembly may constitute an additional embodiment.