Adjustable helmet for a hockey or lacrosse player

Abstract

An adjustable helmet having first and second shells and a single actuator comprising at least one tooth, the single actuator being moveable between: a first locked position, wherein the at least one tooth retains the first and second shells and the first and second shells define a first hollow space; a released position, wherein the at least one tooth no longer retains the first and second shells such that one of the first and second shells is moveable relative to the other of the first and second shells; and a second locked position, wherein the at least one tooth retains the first and second shells and the first and second shells define a second hollow space, the second hollow space being different than the first hollow space.

Claims

1. An adjustable helmet having a front region, a rear region and a pair of opposite side regions, the helmet comprising: a) a shell including: i) a first shell portion; ii) a second shell portion engaged with the first shell portion, the second shell portion having an outer side, an opposite inner side, and an aperture, said first and said second shell portions being movable one with relation to the other to adjust a fit of the helmet on the player's head; b) a locking assembly located in the rear region of the helmet, said locking assembly including: i) an actuator mounted to the second shell portion, the actuator being movable between a locked position and a released position, the actuator residing on the second shell portion and registering with the aperture on the second shell portion; ii) a backing member on the inner side of the second shell portion; iii) an elongated band associated with the first shell portion and extending to the second shell portion such that relative movement between the first and the second shell portions produces a corresponding movement between the band and the backing member, the band being located between the second shell portion and the back member; iv) the actuator being configured such that when the actuator moves toward the locked position, it extends into the aperture to interact with the elongated band to prevent the band from moving with relation to the backing member and prevent the first shell portion from moving with relation to the second shell portion; v) the actuator being further configured such that when the actuator is moved toward the released position it moves out of the aperture at a top portion of the shell to enable the elongated band to move with relation to the backing member; c) wherein the actuator is located centrally between the opposite side regions; d) wherein the actuator is the sole actuator to perform an adjust of a position of said first and said second shell portions relative to one another to adjust a fit of the helmet on the player's head.

2. An adjustable helmet as defined in claim 1, wherein the second shell portion includes a recess for receiving the actuator, the actuator being configured to recede in the recess when the actuator acquires the locked position.

3. An adjustable helmet as defined in claim 1, wherein the first shell portion is configured to cover at least partially a front region and side regions of a wearer's head when the helmet is worn and the second shell portion is configured to cover at least partially a rear region of the wearer's head when the helmet is worn.

4. An adjustable helmet as defined in claim 1, wherein the actuator pivotally moves between the locked position and the released position.

5. An adjustable helmet as defined in claim 4, wherein the actuator includes a tooth configured for engaging the elongated band through the aperture when the actuator is in the locked position.

6. An adjustable helmet as defined in claim 5, wherein the tooth resides on the outer side of the second shell portion when the actuator is moved from the locked position to the released position.

7. An adjustable helmet as defined in claim 5, wherein the actuator has a plurality of teeth configured for engaging the elongated band.

8. An adjustable helmet as defined in claim 1, wherein the helmet has a longitudinal axis extending in a front-to-back direction of the helmet and a transversal axis extending transversally with relation to the longitudinal axis, the actuator pivotally moving between the locked position and the released position along an axis that extends generally along the transversal axis.

9. An adjustable helmet having a front region, a rear region and a pair of opposite side regions, the helmet comprising: a) a shell including: i) a first shell portion; ii) a second shell portion engaged with the first shell portion, the second shell portion having an outer side, an opposite inner side, and an aperture, said first and said second shell portions being movable one with relation to the other to adjust a fit of the helmet on the player's head; b) a locking assembly located in the rear region of the helmet, said locking assembly including: i) an actuator mounted to the second shell portion, the actuator being movable between a locked position and a released position, the actuator residing on the second shell portion and registering with the aperture on the second shell portion; ii) a backing member on the inner side of the second shell portion; iii) an elongated band associated with the first shell portion and extending to the second shell portion such that relative movement between the first and the second shell portions produces a corresponding movement between the band and the backing member, the band being located between the second shell portion and the backing member; iv) the elongated band having a first face and an opposite second face, wherein the first face is oriented toward the backing member and the second face is oriented toward the inner side of the second shell portion; v) the actuator being configured such that when the actuator moves toward the locked position, it extends into the aperture to interact with the elongated band through the second face of the elongated band to prevent the elongated band from moving with relation to the backing member and prevent the first shell portion from moving with relation to the second shell portion; c) wherein the actuator is located centrally between the opposite side regions; d) wherein the actuator is the sole actuator to perform an adjustment of a position of said first and said second shell portions relative to one another to adjust a fit of the helmet on the player's head.

10. An adjustable helmet as defined in claim 9, wherein the second shell portion includes a recess for receiving the actuator, the actuator being configured to recede in the recess when the actuator acquires the locked position.

11. An adjustable helmet as defined in claim 9, wherein the first shell portion is configured to cover at least partially a front region and side regions of a wearer's head when the helmet is worn and the second shell portion is configured to cover at least partially a rear region of the wearer's head when the helmet is worn.

12. An adjustable helmet as defined in claim 9, wherein the actuator pivotally moves between the locked position and the released position.

13. An adjustable helmet as defined in claim 12, wherein the actuator includes a tooth configured for engaging the elongated band through the aperture when the actuator is in the locked position.

14. An adjustable helmet as defined in claim 13, wherein the actuator has a plurality of teeth configured for engaging the elongated band.

15. An adjustable helmet as defined in claim 13, wherein the tooth resides on the outer side of the second shell portion when the actuator is moved from the locked position to the released position.

16. An adjustable helmet as defined in claim 9, wherein the helmet has a longitudinal axis extending in a front-to-back direction of the helmet and a transversal axis extending transversally with relation to the longitudinal axis, the actuator pivotally moving between the locked position and the released position along an axis that extends generally along the transversal axis.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) A detailed description of the embodiments of the present invention is provided herein below, by way of example only, with reference to the accompanying drawings, in which:

(2) FIG. 1 is a perspective view of a head of a player;

(3) FIG. 2 is a right side elevational view of the head of the player of FIG. 1;

(4) FIG. 3 is a front perspective exploded view of a helmet constructed in accordance with an embodiment of the invention;

(5) FIG. 4 is a rear perspective exploded view of the helmet of FIG. 3;

(6) FIG. 5A shows a top view of the first shell of the helmet of FIG. 3;

(7) FIG. 5B shows a top view of the second shell of the helmet of FIG. 3;

(8) FIG. 6 is a rear side perspective view of the helmet of FIG. 3;

(9) FIG. 7 is a rear side perspective view of the helmet of FIG. 3, with the single actuator shown in a released position;

(10) FIG. 8 is an enlarged rear elevational view of the single actuator shown in a released position;

(11) FIG. 9A is a side view of the helmet of FIG. 3, with the single actuator in a first locked position, wherein the first and second shells define a first hollow space for receiving the player's head;

(12) FIG. 9B is a front view of the helmet corresponding to the position shown in FIG. 9A;

(13) FIG. 10A is a side view of the helmet of FIG. 3, with the single actuator shown in a released position and showing movement of the back shell relative to the first shell;

(14) FIG. 10B is a front view of the helmet corresponding to the position shown in FIG. 10A;

(15) FIG. 11A is a side view of the helmet of FIG. 3, with the single actuator in the released position;

(16) FIG. 11B is a front view of the helmet corresponding to the position shown in FIG. 11A;

(17) FIG. 12A is a side view of the helmet of FIG. 3, with the single actuator in a second locked position, wherein the first and second shells define a second hollow space for receiving the player's head;

(18) FIG. 12B is a front view of the helmet corresponding to the position shown in FIG. 12A;

(19) FIG. 13A is an enlarged cross-sectional view of the helmet of FIG. 9B taken along line 13A-13A;

(20) FIG. 13B is an enlarged cross-sectional view showing the single actuator in the first locked position;

(21) FIG. 14 is an enlarged cross-sectional view of the helmet of FIG. 10B taken along line 14-14;

(22) FIG. 15 is an enlarged cross-sectional view of the helmet of FIG. 11B taken along line 15-15;

(23) FIG. 16A is an enlarged cross-sectional view of the helmet of FIG. 12B taken along line 16A-16A;

(24) FIG. 16B is an enlarged cross-sectional view showing the single actuator in the released position in broken lines and the single actuator in the second locked position in full lines;

(25) FIG. 17 is an enlarged bottom perspective view of the actuator;

(26) FIG. 18 is a cross-sectional view of the actuator of FIG. 17 taken along line 18-18;

(27) FIG. 19 is a cross-sectional view of the actuator of FIG. 17 taken along line 19-19; and

(28) FIG. 20 is an enlarged top perspective view of a base member.

(29) In the drawings, embodiments of the invention are illustrated by way of examples. It is to be expressly understood that the description and drawings are only for the purpose of illustration and are an aid for understanding. They are not intended to be a definition of the limits of the invention.

DETAILED DESCRIPTION OF THE EMBODIMENTS OF THE INVENTION

(30) To facilitate the description, any reference numeral designating an element in one figure will designate the same element if used in any other figures. In describing the embodiments, specific terminology is resorted to for the sake of clarity but the invention is not intended to be limited to the specific terms so selected, and it is understood that each specific term comprises all equivalents.

(31) Unless otherwise indicated, the drawings are intended to be read together with the specification, and are to be considered a portion of the entire written description of this invention. As used in the following description, the terms horizontal, vertical, left, right, up, down and the like, as well as adjectival and adverbial derivatives thereof (e.g., horizontally, rightwardly, upwardly, radially, etc.), simply refer to the orientation of the illustrated structure. Similarly, the terms inwardly, outwardly and radially generally refer to the orientation of a surface relative to its axis of elongation, or axis of rotation, as appropriate.

(32) FIGS. 1 and 2 illustrate a head of a hockey or lacrosse player. The head comprises a crown region CR, left and right side regions LS, RS, a back region BR and an occipital region OR. The crown region CR has a front part that substantially corresponds to the forehead and a top part that substantially corresponds to the front top part of the head. In fact, the crown region CR generally corresponds to the frontal bone region of the head. The left and right side regions LS, RS are approximately located above the ears of the player. The occipital region OR substantially corresponds to the region around and under the external occipital protuberance of the head.

(33) FIGS. 3 and 4 show an adjustable helmet 10 for receiving the head of the hockey or lacrosse player. The helmet 10 extends along a longitudinal axis A-A and comprises a first shell 12 and a second shell 14 interconnected together. As shown, the first shell 12 may be a front shell and the second shell 14 may be a rear shell. The first shell 12 and second shell 14 may be made of a relatively rigid material, such as polyethylene, NYLON, polycarbonate materials, thermoplastics, or thermosetting resins or any other suitable material. The first and second shells 12, 14 include a plurality of ventilation apertures that provide the added comfort of allowing air to circulate around the head of the player.

(34) The first shell 12 has a first top portion 12.sup.TP for facing at least partially the top region of the player's head, a front portion for facing at least partially the crown region of the player's head, and left and right side portions extending rearwardly from the front portion for facing at least partially the left and right side regions of the player's head.

(35) The second shell 14 has a second top portion 14.sup.TP for facing at least partially the top region of the player's head, a rear portion for facing at least partially the back and occipital regions of the player's head, and left and right side portions extending forwardly from the rear portion for facing at least partially the left and right side regions of the player's head. As shown the first top portion 12.sup.TP may be a front top portion and the second top portion 14.sup.TP may be a rear top portion.

(36) The first shell 12 overlays left and right front inner pads 15, 16 while the second shell 14 overlays left and right rear inner pads 18, 20 and a top inner pad 22. The left and right front inner pads 15, 16 face the crown region CR and face at least partially the left and right side regions LS, RS. The left and right rear inner pads 18, 20 face the back region BR and face at least partially the left and right side regions LS, RS. The top inner pad 22 faces the back and top regions of the head. The inner pads 16, 18, 20, 22 may be made of shock absorbing materials such as expanded polypropylene (EPP) or expanded polyethylene (EPE). Other materials can also be used without departing from the spirit of the invention.

(37) The left and right front inner pads 15, 16 have a three-dimensional external configuration that matches the three-dimensional internal configurations of the first shell 12 and is mounted to the first shell 12 by any suitable means such glue, stitches, tacks, staples or rivets. Similarly, the left and right rear inner pads 18, 20 have three-dimensional external configurations that match the three-dimensional internal configurations of the second shell 14 and are mounted to the second shell 14 by any suitable means, such as glue, stitches, tacks, staples or rivets.

(38) The helmet 10 may also comprise left and right comfort pads 24, 26 facing the left and right side regions and located just above the ears and left and right comfort pads 28, 30 facing the left and right temple regions of the head. The helmet 10 may further comprise left and right comfort pads 25, 27 facing the left and right side regions and located just above the ears and between the first and second shells 12, 14. The comfort pads 24, 25, 26, 27, 28, 30 may be made of soft materials such as polyvinyl chloride (PVC). Other materials can also be used without departing from the spirit of the invention. The comfort pads 24, 25, 26, 27, 28, 30 may be affixed on the inner surface of the corresponding inner pads or shells by any suitable means, such as glue or an adhesive layer.

(39) The helmet 10 may comprise left and right ear covers 32, 34 for protecting the ears of the player.

(40) The helmet 10 may also comprise an occipital pad 36 facing the occipital region OR of the player's head and movable relative to the second shell 14 between different positions to adjust the fit of the helmet 10 on the player's head.

(41) The occipital pad 36 may be made of any suitable padding material. For example, in some embodiments, the occipital pad 36 may comprise polymeric foam such as expanded polypropylene (EPP) foam, expanded polyethylene (EPE) foam, foam having two or more different densities (e.g., high-density polyethylene (HDPE) foam and low-density polyethylene foam), or any other suitable foam. Other materials may be used for the occipital pad 36 in other embodiments.

(42) As best shown in FIG. 4, the occipital pad 36 is supported by a support 38 which is movable relative to the second shell 24 in order to move the occipital pad 36. A wedge 40 (best shown in FIG. 3) is located between the second shell 14 and the support 38 and connected to an actuator 42 such that, when the player operates the actuator 42, the wedge 40 moves between different positions relative to the second shell 14 and the support 38. The wedge 40 has a thickness that increases gradually from its top edge to its bottom edge such that downward vertical displacement of the wedge 40 between the second shell 14 and the support 38 moves the occipital pad 36 from a first position towards a second position in which it applies a greater pressure upon the occipital region OR of the player's head. Movement of the occipital pad 36 allows it to be positioned in a first position in which it is closer to the back portion of the second shell 14 and in a second position in which it is further inward of the helmet 10 and closer to the occipital region OR to apply more pressure on the occipital region OR than in its first position.

(43) As best shown in FIGS. 3 and 4, the support 38 may have an upper portion with left and right connectors, projections or pins 38A that are received in apertures provided in the rear inner pads 18, 20 (see aperture 20A) such that the support is mounted to the rear inner pads 18, 20. The upper portion of the support 38 may also comprise a member extending upwardly with a connector, projection or pin 38B that is received in an aperture 22A provided in the top inner pad 22 such that the top inner pad 22 is only affixed at that point to the second shell 14.

(44) The helmet 10 also comprises a single actuator 50 comprising at least one tooth extending substantially transversely relative to the longitudinal axis A-A.

(45) As best seen in FIGS. 8 and 17, the single actuator 50 has a cam member 51 adapted to pivot about an axis B-B that extends substantially transversely relative to the longitudinal axis A-A and the single actuator 50 extends from the cam member 51 and has a handle 53 for allowing the player to move the single actuator 50 between a first locked position (shown in FIG. 13B), a released position (shown in FIG. 14) and a second locked position (shown in full lines in FIG. 16B). The handle 53 may have a curved or recessed portion for allowing movement or rotation of the single actuator 50 by the player with only one finger or with only the thumb.

(46) The single actuator 50 may comprise a first pair of first and second teeth 52A.sup.1, 52A.sup.2 being spaced apart and a second pair of first and second teeth 52B.sup.1, 52B.sup.2 being spaced apart. Each of the first and second teeth 52A.sup.1, 52A.sup.2 and first and second teeth 52B.sup.1, 52B.sup.2 extend substantially transversely relative to the longitudinal axis A-A (or along an axis substantially parallel to the axis B-B).

(47) The single actuator 50 is mounted to one of the first and second top portions 12.sup.TP, 14.sup.TP. For example, the second top portion 14.sup.TP may comprise first and second posts 56A, 56B and the single actuator 50 may be pivotally mounted relative to the first and second posts 56A, 56B. The first and second posts 56A, 56B may be integrally formed with the second top portion 14.sup.TP. Alternatively, as best shown in FIGS. 3, 4 and 20, the first and second posts 56A, 56B may be part of a base member 56 and the first and second posts 56A, 56B may extend in apertures 14A, 14B provided in the second top portion 14.sup.TP (see FIG. 5B). The base member 56 may also have a base 56C with first and second apertures 56D.sup.1, 56D.sup.2 (see FIG. 20).

(48) Reverting to FIG. 8, the single actuator 50 may have first and second walls 58A, 58B abutting against the first and second posts 56A, 56B respectively and a wire 60 may slide through holes provided in the first and second walls 58A, 58B and first and second posts 56A, 56B. In one embodiment, the wire 60 may be a wire clip in the shape of a dovetail with both of its ends exerting an external force when it is inserted in the holes. This ensures that the wire 60 will not fall out accidentally, since it would need to be manually compressed in order to be removed.

(49) One of the first and second top portions 12.sup.TP, 14.sup.TP comprises at least one aperture extending substantially transversely relative to the longitudinal axis A-A and the other one of the first and second top portions 12.sup.TP, 14.sup.TP comprises a plurality of apertures extending substantially transversely relative to the longitudinal axis A-A.

(50) Referring to FIGS. 5A, 5B, 13B and 16B, the second top portion 14.sup.TP has a pair of first and second apertures 62.sup.1, 62.sup.2 being spaced apart. It is understood that the first and second apertures 62.sup.1, 62.sup.2 may be replaced by one aperture or opening that is large enough for receiving the first pair of first and second teeth 52A.sup.1, 52A.sup.2 and second pair of first and second teeth 52B.sup.1, 52B.sup.2. The first top portion 12.sup.TP has a plurality of pairs of first and second apertures 64A.sup.1, 64A.sup.2; 64B.sup.1, 64B.sup.2; 64C.sup.1, 64C.sup.2;

(51) 64D.sup.1, 64D.sup.2; 64E.sup.1, 64E.sup.2; 64F.sup.1, 64F.sup.2; 64G.sup.1, 64G.sup.2; 64H.sup.1, 64H.sup.2, More specifically, in one embodiment, the first top portion 12.sup.TP may have a first and second series of eight apertures extending substantially transversely relative to the longitudinal axis A-A, the first and second series of apertures being spaced apart.

(52) Referring to FIG. 13B showing the single actuator 50 in the first locked position, the first tooth 52A.sup.1 and the first tooth 52B.sup.1 extend in the first aperture 62.sup.1. The first tooth 52A.sup.1 and the first tooth 52B.sup.1 also extend in first apertures of the plurality of first apertures 64A.sup.1, 64B.sup.1, 64C.sup.1, 64D.sup.1, 64E.sup.1, 64F.sup.1, 64G.sup.1, 64H.sup.1 (more specifically, the first tooth 52A.sup.1 and the first tooth 52B.sup.1 extend in apertures 64D.sup.1, 64E.sup.1). It is understood that the second tooth 52A.sup.2 and the second tooth 52B.sup.2 also extend in the second aperture 62.sup.2 and the second tooth 52A.sup.2 and the second tooth 52B.sup.2 also extend in first apertures of the plurality of second apertures 64A.sup.2, 64B.sup.2, 64C.sup.2, 64D.sup.2, 64E.sup.2, 64F.sup.2, 64G.sup.2, 64H.sup.2 (more specifically, the second tooth 52A.sup.2 and the second tooth 52B.sup.2 extend in apertures 64D.sup.2, 64E.sup.2). It is also understood that the first pair of first and second teeth 52A.sup.1, 52A.sup.2 and second pair of first and second teeth 52B.sup.1, 52B.sup.2 may extend in the first and second apertures 56D.sup.1, 56D.sup.2 of the base member 56. It is understood that the first and second apertures 56D.sup.1, 56D.sup.2 may be replaced by one aperture or opening that is large enough for receiving the first pair of first and second teeth 52A.sup.1, 52A.sup.2 and second pair of first and second teeth 52B.sup.1, 52B.sup.2.

(53) In the first locked position, the first and second shells 12, 14 define a first hollow space HS.sup.1 for receiving the player's head.

(54) The single actuator 50 is movable to a released position, wherein the at least one tooth no longer extends in the at least one aperture and the plurality of apertures such that one of the first and second shells 12, 14 is moveable relative to the other of the first and second shells 12, 14.

(55) As best shown in FIG. 14, the first tooth 52A.sup.1 and the first tooth 52B.sup.1 no longer extend in the first aperture 62.sup.1 and the first tooth 52A.sup.1 and the first tooth 52B.sup.1 no longer extend in the first apertures of the plurality of first apertures 64A.sup.1, 64B.sup.1, 64C.sup.1, 64D.sup.1, 64E.sup.1, 64F.sup.1, 64G.sup.1, 64H.sup.1 (which were apertures 64D.sup.1, 64E.sup.1) such that one of the first and second shells 12, 14 is moveable relative to the other of the first and second shells 12, 14. It is understood that the second tooth 52A.sup.2 and the second tooth 52B.sup.2 also no longer extend in the second aperture 62.sup.2 and the second tooth 52A.sup.2 and the second tooth 52B.sup.2 also no longer extend in the first apertures of the plurality of second apertures 64A.sup.2, 64B.sup.2, 64C.sup.2, 64D.sup.2, 64E.sup.2, 64F.sup.2, 64G.sup.2, 64H.sup.2 (which were apertures 64D.sup.2, 64E.sup.2).

(56) In use, a player who puts on the helmet 10 and realizes that it is too large or too small, does not need to remove the helmet 10. The player must simply reach up and grasp the single actuator 50 (the handle 53) and rotate the actuator 50. As best shown in FIGS. 6 and 7, the single actuator 50 is mounted to the second top portion 14.sup.TP and is pivotable about an axis that extends substantially transversely relative to the longitudinal axis A-A (or along an axis substantially parallel to the axis B-B shown in FIG. 8) and the single actuator 50 is also located at a central location where it overlies the longitudinal axis A-A such that the player can easily reach up the single actuator 50 (the handle 53) in order to rotate the single actuator 50 with the thumb or with only one finger and bring the single actuator 50 in the released position shown in FIGS. 7 and 14.

(57) Because the helmet 10 has a single actuator, namely the actuator 50, the player can actuate, move or rotate the single actuator 50 with only one hand as opposed to using both hands as required by prior helmets wherein left and right locking devices are located on both sides of the helmet. By providing the single actuator 50 on one of the first and second top portions 12.sup.TP, 14.sup.TP, this allows to reduce the manufacturing cost and the number of components of the helmet. Moreover, because actuators on the left and right sides of the helmet are eliminated, those sides may be designed as being thinner such that the helmet may be generally less bulky.

(58) Once the single actuator 50 is in the released position, the player can expand or contract the size of the helmet 10 by pushing or pulling the first and second shells 12, 14 in relation to each other. As shown in FIG. 14, the second shell 14 is pushed rearwardly in order to increase the size of the hollow cavity defined by the first and second shells 12, 14.

(59) As indicated previously, the top inner pad 22 is only affixed to the second shell 14 at only one point (connector 38B best seen in FIG. 3). The upper surface of the top inner pad 22 may also comprise a recess 22B for at least partially receiving the base 56C of the base member 56 and the top inner pad 22, base member 56 and actuator 50 thus move with the second shell 14 when the first and second shells 12, 14 move relative to each other. Moreover, as best seen in FIGS. 5A, 13B and 16B, the first top portion 12.sup.TP may define a band, strip or extension extending generally rearwardly along the axis A-A and being at least partially located between the second top portion 14.sup.TP and the base 56C of the base member 56. The bottom surface of the second top portion 14.sup.TP may also comprise a channel or a rectangular opening for at least partially receiving the first top portion extension.

(60) Once the player has selected a desired helmet size, the first shell 12 and second shell 14 must be securely locked in place so that movement of the first and second shells 12, 14 in relation to each other is prevented. The player must then actuate (rotate) the actuator 50 such that this actuator is in a second locked position, wherein the at least one tooth extends in the at least one aperture and in a second aperture of the plurality of apertures.

(61) Referring to FIG. 16B showing the single actuator 50 in the second locked position, the first tooth 52A.sup.1 and the first tooth 52B.sup.1 extend in the first aperture 62.sup.1. The first tooth 52A.sup.1 and the first tooth 52B.sup.1 also extend in second apertures of the plurality of first apertures 64A.sup.1, 64B.sup.1, 64C.sup.1, 64D.sup.1, 64E.sup.1, 64F.sup.1, 64G.sup.1, 64H.sup.1 (more specifically, the first tooth 52A.sup.1 and the first tooth 52B.sup.1 extend in apertures 64G.sup.1, 64H.sup.1). It is understood that the second tooth 52A.sup.2 and the second tooth 52B.sup.2 also extend in the second aperture 62.sup.2 and the second tooth 52A.sup.2 and the second tooth 52B.sup.2 also extend in second apertures of the plurality of second apertures 64A.sup.2, 64B.sup.2, 64C.sup.2, 64D.sup.2, 64E.sup.2, 64F.sup.2, 64G.sup.2, 64H.sup.2 (more specifically, the second tooth 52A.sup.2 and the second tooth 52B.sup.2 extend in apertures 64G.sup.2, 64H.sup.2).

(62) In the second locked position, the first and second shells 12, 14 define a second hollow space HS.sup.2 for receiving the player's head. As best shown in FIGS. 13A and 16A, the second hollow space HS.sup.2 is different (larger) that the first hollow space HS.sup.1.

(63) It is understood that either of the first pair of teeth 52A.sup.1, 52A.sup.2 or the second pair of teeth 52B.sup.1, 52B.sup.2 may be omitted such that the single actuator 50 has only one pair of teeth. It is also understood that the single actuator 50 may only have one tooth extending along the width of the actuator 50 instead of a pair of first and second teeth being spaced apart or instead of the first pair of first and second teeth 52A.sup.1, 52A.sup.2 and the second pair of first and second teeth 52B.sup.1, 52B.sup.2. Similarly, it is understood that the second top portion 14.sup.TP may have one single aperture instead of the pair of first and second apertures 62.sup.1, 62.sup.2 and the first top portion 12.sup.TP may have a plurality of single apertures instead of the plurality of pairs of first and second apertures 64A.sup.1, 64A.sup.2; 64B.sup.1, 64B.sup.2; 64C.sup.1, 64C.sup.2; 64D.sup.1, 64D.sup.2; 64E.sup.1, 64E.sup.2; 64F.sup.1, 64F.sup.2; 64G.sup.1, 64G.sup.2; 64H.sup.1, 64H.sup.2.

(64) If the single actuator 50 has only one tooth, in the first locked position, this tooth extends in the single aperture of the second top portion 14.sup.TP and in a first aperture of the plurality of apertures of the first top portion 12.sup.TP, and in the second locked position, this tooth extends in the single aperture of the second top portion 14.sup.TP and in a second aperture of the plurality of apertures of the first top portion 12.sup.TP.

(65) It is understood that the width and thickness of the tooth (e.g. first and second teeth 52A.sup.1, 52A.sup.2) are determined such that the tooth is tightly received in its corresponding aperture of the series of apertures (e.g. apertures 64A.sup.1, 64B.sup.1, 64C.sup.1, 64D.sup.1, 64E.sup.1, 64F.sup.1, 64G.sup.1, 64H.sup.1) in order to prevent movement of the first and second shells 12, 14 relative to each other. The tooth should therefore tightly register, extend or fit in its corresponding aperture of the series of apertures when the actuator is in the first or second locked position. Moreover, the width, thickness and/or length of the tooth (e.g. first and second teeth 52A.sup.1, 52A.sup.2) are determined such that the tooth can sustain a force due to an impact on the helmet. As best shown in FIG. 19, the tooth may have a generally rectilinear or straight portion 150 followed by a shorter arcuate or curved portion 152. The straight portion 150 may have a length between 0.8 cm and 1.2 cm and the curved portion 152 may extend over a length between 0.1 cm to 0.4 cm. The thickness of the tooth may be between 0.1 cm and 0.3 cm. The tooth may have a width between 0.8 cm and 1.2 cm.

(66) The left and right portions of the first shell 12 may have left and right sliding surfaces, each of the left and right sliding surfaces having first and second projections 72 (pegs) extending inwardly, wherein the left and right portions of the second shell 14 have left and right sliding surfaces, each of the left and right sliding surfaces having first and second slots 70 extending along an axis substantially parallel to the longitudinal axis A-A, and wherein the left and right sliding surfaces of the first shell 12 overlap at least partially the left and right sliding surface of the second shell 14.

(67) The first and second projections 72 register in the first and second slots 70 respectively such that the first and second projections 72 are moveable within the first and second slots 70 between first and second sliding positions when the first and second shells 12, 14 move from the first and second locked positions. The left and right sliding surfaces of the first shell 12 may at least partially overlap the left and right sliding surface of the second shell 14.

(68) The left and right sliding surfaces of the first and second shells 12, 14 may define smooth, interference-free sliding surfaces that are adapted to be in contact with each other when the helmet 10 is secured in a selected position. The interference-free sliding surfaces of the helmet 10 still experience minor unavoidable friction, but can be moved in relation to each other without substantial interference and in a smooth movement.

(69) The slot and peg assembly allows the first shell 12 and the second shell 14 to slide backwards and forwards and guides their relative movement. The slots 70 determine the path of movement of the first shell 12 and the second shell 14 with respect to each other. As can be seen in FIGS. 13A, 14, 15 and 16A, the slots 70 may be oriented in a slightly downward sloping direction from the rear to the front of the helmet 10. Alternatively, the slots 70 may be positioned at any angle depending on how the first shell 12 and the second shell 14 are designed to move in relation to each other.

(70) The above description of the embodiments should not be interpreted in a limiting manner since other variations, modifications and refinements are possible within the scope of the present invention. The scope of the invention is defined in the appended claims and their equivalents.