Apparatus for field maintenance of jammed firearms

Abstract

Elements of the present invention relate to the application of force to a bolt carrier within a firearm when the firearm becomes inoperable. Some elements relate to the application of force by leverage applied with a bar inserted through a weapon's magazine well. Some elements relate to a bar end with prongs that provide for clearance of a weapon's bolt shaft while engaging the weapon's bolt carrier. Some elements relate to accommodation of multiple weapon dimensions with a single tool.

Claims

1. An apparatus for applying force to a weapon bolt carrier via the weapon's magazine well, said apparatus comprising: an elongate bar having a first end and a second end, the first end of the elongate bar comprising a first set of two elongate prongs integrally formed with the first end of the elongate bar, the first set of two elongate prongs longitudinally extending substantially parallel to a longitudinal axis of the elongate bar, outer surfaces of the first set of two elongate prongs being substantially parallel along their length to one another and extending substantially parallel to the longitudinal axis, the first set of two elongate prongs defining a first outer width of approximately 1.8 cm such that the first end of the elongate bar is configured to fit into an AR-15 magwell without interference fit and configured to pry a bolt carrier of the AR-15, first inner surfaces of the first set of two elongate prongs being substantially parallel along their lengths and defining and being separated by a first gap, at least a portion of each first inner surface of the first set of two elongate prongs having a length at least equal to a first gap width of the first gap, and the second end of the elongate bar comprising a second set of two elongate prongs integrally formed with the second end of the elongate bar, the second set of two elongate prongs longitudinally extending substantially parallel to the longitudinal axis of the elongate bar, outer surfaces of the second set of two elongate prongs being substantially parallel to one another along their length and extending substantially parallel to the longitudinal axis, the second set of two elongate prongs defining a second outer width of approximately 2.5 cm so that the second end of the elongate bar is configured to fit into an AR-10 magwell without interference fit and configured to pry a bolt carrier of the AR-10, second inner surfaces of the second set of two elongate prongs being substantially parallel to one another along their lengths and defining and being separated by a second gap, at least a portion of each second inner surface of the second set of two elongate prongs having a length at least equal to a second gap width of the second gap.

2. The apparatus of claim 1, wherein a first thickness of the elongate bar is less than the first and second outer widths of the elongate bar and wherein a top and bottom surface of the elongate bar from proximate the first end to proximate the second end of the elongate bar are substantially planar and substantially parallel.

3. The apparatus of claim 2, wherein a thickness of the first set of prongs is tapered from the first thickness of the elongate bar to a second thickness proximate terminal ends of the first set of prongs that is less than the first thickness.

4. The apparatus of claim 2, wherein a thickness of the second set of prongs is tapered from the first thickness of the elongate bar to a second thickness proximate terminal ends of the second set of prongs that is less than the first thickness.

5. The apparatus of claim 1, wherein the first inner surfaces of the first set of prongs are parallel to one another and planar along their respective lengths to proximate their respective terminal ends.

6. The apparatus of claim 1, wherein the second inner surfaces of the second set of prongs are parallel to one another and planar along their respective lengths to proximate their respective terminal ends.

7. The apparatus of claim 1, wherein the elongate bar, first set of prongs and second set of prongs are formed from a single length of steel.

8. The apparatus of claim 1, wherein a thickness of the elongate bar is less than the first and second widths of the elongate bar and wherein a top surface and a bottom surface of the elongate bar from proximate the first end to proximate the second end of the elongate bar are substantially planar and parallel.

9. The apparatus of claim 1, wherein the elongate bar includes a first bend spaced a first distance from the first end, the first distance being greater than a depth of insertion of the first end into the AR-15 magwell.

10. The apparatus of claim 9, wherein the elongate bar includes a second bend spaced a second distance from the second end, the second distance being greater than a depth of insertion of the second end into the AR-10 magwell.

11. The apparatus of claim 1, wherein the first gap between and defined by the first set of prongs is U-shaped and wherein the second gap between and defined by the second set of prongs is U-shaped.

12. The apparatus of claim 1, wherein a thickness of the elongate bar is less than the first and second widths of the elongate bar and wherein a top surface and a bottom surface of the elongate bar from proximate the first end to proximate the second end of the elongate bar are substantially planar and parallel.

13. A bolt carrier unjamming apparatus used in combination with a first bolt shaft of a first smaller magwell of a first firearm and a second bolt shaft of a second larger magwell of a second firearm, comprising: an elongate bar having a first end and a second end, and a long axis extending between the first end and the second end; a first pair of elongate prongs integrally formed with and longitudinally extending from the first end of the bar, the first pair of elongate prongs defining first inner and outer substantially parallel surfaces, the first outer substantially parallel surfaces spaced apart approximately 1.8 cm so that the first pair of elongate prongs are configured to fit within the first magwell of the first firearm, the first pair of elongate prongs defining a first gap between the first pair of elongate prongs configured to extend around the first bolt shaft of the first firearm; and a second pair of elongate prongs integrally formed with and longitudinally extending from the second end of the bar, the second pair of elongate prongs defining second inner and outer substantially parallel surfaces, the second outer substantially parallel surfaces spaced apart approximately 2.5 cm so that the second pair of elongate prongs are configured to fit within the second magwell of the second firearm, the second pair of elongate prongs defining a second gap between the second pair of elongate prongs configured to extend around the second bolt shaft of the second firearm.

14. The apparatus of claim 13, wherein each of the first pair of elongate prongs is tapered in thickness from proximate the first end of the bar to free ends of the first pair of elongate prongs.

15. The apparatus of claim 13, wherein each of the second pair of elongate prongs is tapered in thickness from proximate the second end of the bar to free ends of the second pair of elongate prongs.

16. The apparatus of claim 13, wherein the first firearm comprises an AR-15.

17. The apparatus of claim 13, wherein the second firearm comprises an AR-10.

18. The apparatus of claim 13, wherein the first outer surfaces of the first pair of prongs are contiguous and linear with corresponding outer surfaces of the bar at the first end of the bar and the second outer surfaces of the second pair of prongs are contiguous and linear with corresponding outer surfaces of the bar at the second end of the bar.

19. The apparatus of claim 13, wherein a first thickness of the bar is less than the first and second widths of the bar and wherein a top and bottom surface of the bar from proximate the first end to proximate the second end of the bar are substantially planar and substantially parallel.

20. The apparatus of claim 19, wherein a thickness of the first pair of prongs is tapered from the first thickness of the elongate bar to a second thickness proximate terminal ends of the first pair of prongs that is less than the first thickness and wherein a thickness of the second pair of prongs is tapered from the first thickness of the bar to a second thickness proximate terminal ends of the second pair of prongs that is less than the first thickness.

Description

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS

(1) The objects and features of the present invention will become more fully apparent from the following description and appended claims, taken in conjunction with the accompanying drawings. Understanding that these drawings depict only typical embodiments of the invention and are, therefore, not to be considered limiting of its scope, the invention will be described and explained with additional specificity and detail through the use of the accompanying drawings in which:

(2) FIG. 1 shows a typical, prior-art rifle cartridge in a side view.

(3) FIG. 2 shows the typical, prior-art rifle cartridge of FIG. 2 in an end view.

(4) FIG. 3 shows an embodiment of the present invention in a flat format;

(5) FIG. 4 shows an embodiment of the present invention with dimensions relative to generic firearm dimensions;

(6) FIG. 5 shows an embodiment of the present invention with angular bend points;

(7) FIG. 6 shows an embodiment of the present invention with curved curve points;

(8) FIG. 7 shows an embodiment of the present invention in relation to an exemplary bot carrier group;

(9) FIG. 8 shows an embodiment of the present invention in relation to an exemplary lower receiver of a weapon;

(10) FIG. 9 shows a prior art exemplary lower receiver with integral magwell;

(11) FIG. 10 shows a section view of an embodiment of the present invention in relation to an exemplary magwell with dimensions;

(12) FIG. 11 is a side sectional view of an embodiment of the present invention in relation to an exemplary prior art lower receiver with integral magwell;

(13) FIG. 12 is a top view of an embodiment of the present invention in relation to an exemplary lower receiver with integral magwell.

DETAILED DESCRIPTION OF THE INVENTION

(14) A description of embodiments of the present invention will now be given with reference to the Figures. It is expected that the present invention may take many other forms and shapes, hence the following disclosure is intended to be illustrative and not limiting, and the scope of the invention should be determined by reference to the appended claims.

(15) Some embodiments of the present invention can be described with reference to FIG. 3. These embodiments comprise a substantially rigid bar 30 that is approximately 0.5 cm thick 31 throughout its length and 2.5 cm wide at a wide end 32 while being approximately 1.8 cm wide at a narrow end 33. The wide end 32 of the bar 30 terminates in two wide-end prongs 35 on either side of the bar. These prongs 35 may be approximately 0.15 cm wide and may taper to a point at their ends. The gap 36 between the prongs 35 is approximately 2.3 cm wide (transverse to the bar's longitudinal axis) and approximately 1.5 to 2.5 cm deep (along the bar's longitudinal axis). In an exemplary embodiment, the wide-end prong length or wide-end gap depth may be 2.0 cm.

(16) The narrow end 33 of the bar 30 may also terminate with two narrow-end prongs 37, which are approximately 0.4 cm wide. The gap 38 between the two narrow-end prongs 37 may be approximately 1.0 cm wide and approximately 1 cm deep along the longitudinal axis of the bar. In an exemplary embodiment, the narrow-end prong length or narrow-end gap depth may be 1.8 cm.

(17) The taper 34 from the wide-end width of approximately 2.5 cm and the narrow-end width of 1.8 cm may occur at almost any place along the length of the bar, but, in a preferred embodiment, will occur at a location that is at least approximately 7.5 cm from the ends of the narrow-end prong tips, thereby making the narrow portion 33 of the bar 30 at least approximately 7.5 cm in length. In some embodiments, the narrow portion 33 of the bar 30 may extend almost the entire length of the bar 30 such that the taper 34 occurs near the wide-end prongs 35.

(18) Embodiments of the present invention may be constructed of various materials such as steel, aluminum, brass and other metals and alloys as well as carbon fiber, high-strength plastics, fiberglass, fiberglass-reinforced plastic and combinations thereof. The thickness of the bar 30 may vary depending on the strength and rigidity of the materials employed.

(19) Some embodiments of the present invention may be described with reference to FIG. 4. These embodiments are described with relative dimensions that relate to common weapon dimensions. In these embodiments, the bolt manipulation bar 50 comprises a narrow end 55 and a wide end 54. Each end 54, 55 may terminate with two prongs 56, 57. In these embodiments, the narrow end 55 of the bar has a narrow-end length A 45 that is at least as long as the distance from the center of an AR-15/M16 rifle bolt to the base of the magazine well (magwell) on the AR-15/M16 rifle. These embodiments may further comprise a narrow-end width B 46 that is slightly less than the width of an AR-15/M16 magwell from side to side so that the narrow end 55 will fit into an AR-15/M16 magwell without an interference fit.

(20) These embodiments may further comprise a gap width C 47 that is slightly wider than the diameter of an AR-15/M16 bolt shaft such that the prongs 56 at the narrow end 55 of the bar 50 will fit around the AR-15/M16 bolt shaft to engage the bolt carrier. These embodiments may further comprise a gap depth D 48 that is at least the diameter of the AR-15/M16 bolt shaft diameter.

(21) At the wide end 54 of the bar, some embodiments may comprise a wide-end width E 51 that is slightly less than the width of an AR-10 magwell such that the wide end 54 of the bar will fit into an AR-10 magwell without an interference fit. These embodiments may further comprise a wide-end gap width G 53 that is slightly larger than the diameter of an AR-10 bolt shaft such that the prongs 57 at the wide end 54 of the bar 50 may extend around the sides of an AR-10 bolt shaft. Some embodiments may further comprise a wide-end gap depth F 52 that is approximately the diameter of an AR-10 bolt shaft, again allowing engagement of prongs 57 around the AR-10 bolt shaft.

(22) Other embodiments of the present invention may be described with reference to FIG. 4.

(23) These embodiments are described with relative dimensions that relate to generic firearm dimensions. In these embodiments, the bolt manipulation bar 50 comprises a narrow end 55 and a wide end 54. Each end 54, 55 may terminate with two prongs 56, 57. In these embodiments, the narrow end 55 of the bar has a narrow-end length A 45 that is at least as long as the distance from the center of a first firearm bolt to the base of the magazine well (magwell) of the first firearm. These embodiments may further comprise a narrow-end width B 46 that is slightly less than the width of a first firearm magwell from side to side so that the narrow end 55 will fit into a first firearm magwell without an interference fit.

(24) These embodiments may further comprise a gap width C 47 that is slightly wider than the diameter of a first firearm bolt shaft such that the prongs 56 at the narrow end 55 of the bar 50 will fit around the first firearm bolt shaft to engage the bolt carrier. These embodiments may further comprise a gap depth D 48 that is at least the diameter of the first firearm bolt shaft diameter.

(25) At the wide end 54 of the bar, some embodiments may comprise a wide-end width E 51 that is slightly less than the width of a second firearm magwell such that the wide end 54 of the bar will fit into a second firearm magwell without an interference fit. These embodiments may further comprise a wide-end gap width G 53 that is slightly larger than the diameter of a second firearm bolt shaft such that the prongs 57 at the wide end 54 of the bar 50 may extend around the sides of a second firearm bolt shaft. Some embodiments may further comprise a wide-end gap depth F 52 that is approximately the diameter of a second firearm bolt shaft, again allowing engagement of prongs 57 around the a second firearm bolt shaft.

(26) Further embodiments of the present invention may be described with reference to FIG. 4. These embodiments are described with relative dimensions that relate to common weapon dimensions. In these embodiments, the bolt manipulation bar 50 comprises a narrow end 55 and a wide end 54. Each end 54, 55 may terminate with two prongs 56, 57. In these embodiments, the narrow end 55 of the bar has a narrow-end length A 45 that is at least as long as the distance from the center of an AR-15/M16 rifle bolt to the base of the magazine well (magwell) on the AR-15/M16 rifle. These embodiments may further comprise a narrow-end width B 46 that is slightly less than the width of an AR-15/M16 magwell from side to side so that the narrow end 55 will fit into an AR-15/M16 magwell without an interference fit.

(27) These embodiments may further comprise a gap width C 47 that is slightly wider than the diameter of an AR-15/M16 bolt shaft such that the prongs 56 at the narrow end 55 of the bar 50 will fit around the AR-15/M16 bolt shaft to engage the bolt carrier. These embodiments may further comprise a gap depth D 48 that is at least the diameter of the AR-15/M16 bolt shaft diameter.

(28) At the wide end 54 of the bar, some embodiments may comprise a wide-end width E 51 that is slightly less than the width of a DPMS LR-308 magwell such that the wide end 54 of the bar will fit into a DPMS LR-308 magwell without an interference fit. These embodiments may further comprise a wide-end gap width G 53 that is slightly larger than the diameter of a DPMS LR-308 bolt shaft such that the prongs 57 at the wide end 54 of the bar 50 may extend around the sides of a DPMS LR-308 bolt shaft. Some embodiments may further comprise a wide-end gap depth F 52 that is approximately the diameter of a DPMS LR-308 bolt shaft, again allowing engagement of prongs 57 around the DPMS LR-308 bolt shaft.

(29) In some embodiments of the present invention the narrow-end and/or wide-end gap depths may be less than the diameter of a rifle bolt and prong lengths may than stated above while still allowing at least partial engagement of the prongs with the bolt carrier. These embodiments may comprise smaller gap depths and prong lengths.

(30) Some embodiments of the present invention may be described with reference to FIG. 5. In these embodiments, the bar 60 is not a flat bar, but is bent at bend points 61 and 62. These bends provide a fulcrum that is closer than the bottom edge of the magwell thereby increasing leverage on the bolt during use as compared to a flat bar. Accordingly, the distances 63, 64 are less than the distance from the center of a weapon's bolt or barrel axis to the base of the magwell. In some embodiments the distances 63 and 64 may be different to accommodate two different weapons. In some embodiments, these weapons may be the AR-15/M16 and the AR-10. In some embodiments, these weapons will be the AR-15/M16 and the DPMS LR-308.

(31) Some embodiments of the present invention may be described with reference to FIG. 6. In these embodiments, the bar 70 is not a flat bar, but is curved at curve points 71 and 72. These curves provide a fulcrum that is closer than the bottom edge of the magwell thereby increasing leverage on the bolt during use as compared to a flat bar. Accordingly, the distances 73, 74 are less than the distance from the center of a weapon's bolt or barrel axis to the base of the magwell. In some embodiments the distances 73 and 74 may be different to accommodate two different weapons. In some embodiments, these weapons may be the AR-15/M16 and the AR-10. In some embodiments, these weapons will be the AR-15/M16 and the DPMS LR-308.

(32) Some embodiments of the present invention may be described with reference to FIG. 7. FIG. 7 is a diagram illustrating the prior art bolt carrier group 80 of an AR-15/M16 rifle. The bolt carrier 85 is actuated by gas pressure on the gas key 87. The bolt 83 has a bolt shaft 84 that slides into a bolt hole 88 in the bolt carrier 85 and rotates within the bolt hole 88. Locking lugs 89 on the bolt engage a barrel extension (not shown) to lock the bolt in place during firing. In normal use, the bolt 83 will rotate the locking lugs 89 in the barrel extension to fire a cartridge and subsequently rotate again, in response to gas pressure on the gas key 87 to disengage the barrel extension and allow movement of the bolt to extract the spent cartridge and chambering of a new cartridge.

(33) In a typical weapon, when assembled, the bolt carrier group 80 resides in an upper receiver (not shown) which is assembled with a lower receiver (partially shown) which comprises a magazine well 82. When fully assembled, the magazine well 82 is oriented below the bolt carrier as shown in FIG. 7. If the weapon becomes jammed, embodiments of the present invention 86 may be inserted into the magazine well (magwell) 82 and these embodiments 86 may be manipulated to engage the bolt carrier and pry against the bolt carrier so as to apply force against the bolt carrier and force it open. Once the bolt is opened, the weapon may be rendered safe for transport or for immediate maintenance.

(34) Some embodiments of the present invention may be described with reference to FIG. 8. These embodiments are illustrated with reference to a prior art lower receiver 91 for an AR-15/M16 rifle. This lower receiver 91 comprises an integral magwell into which a magazine may be inserted for feeding cartridges into the weapon during semi-automatic or automatic use. Embodiments of the present invention 90 may be inserted into the magwell 92 for manipulation of a bolt carrier (not shown in FIG. 8, but shown in FIG. 7) that resides above the magwell 92. As illustrated, it is evident that these embodiment must have a width 46, 51 (shown in FIG. 4) that is less that the width of the magwell 92 to allow movement within the magwell 92. However, these embodiments must be wide enough to accommodate prongs 93 that are spaced far enough apart to accommodate the bolt shaft 84 between them.

(35) FIG. 9 is a side view of a prior art AR-15/M16 lower receiver 101 with an integral magwell 100 into which embodiments of the present invention 102 may be inserted. Typical dimensions of the lower receiver and magwell are illustrated therein.

(36) FIG. 10 is a sectional view of a prior art AR-15/M16 magwell 110 showing a section of an embodiment of the present invention 111 inserted in the magwell. Typical magwell dimensions are shown therein. The magwell width 112 is shown at 0.898 inches with a tolerance of +0.010 inches. Accordingly, the width of an embodiment of the present invention that accommodates this weapon must be less than 0.888 inches. To allow clearance for uninhibited, non-interference movement within the magwell, an exemplary embodiment may have a width of less than 0.75 inches.

(37) FIG. 11 is a diagram showing a sectional side view of a prior art AR-15/M16 lower receiver 101 with integral magwell 100. An embodiment of the present invention 102 is inserted into the magwell 100. Typical dimensions are shown thereon in inches.

(38) FIG. 12 is a diagram showing top view of a prior art AR-15/M16 lower receiver 101 with integral magwell 100 and an embodiment of the present invention 102 inserted into the magwell 100. Typical dimensions are shown thereon in inches.

(39) The present invention may be embodied in other specific forms without departing from its spirit or essential characteristics. The described embodiments are to be considered in all respects only as illustrative and not restrictive. The scope of the invention is, therefore, indicated by the appended claims, rather than by the foregoing description. All changes which come within the meaning and range of equivalency of the claims are to be embraced within their scope.