Helmet

Abstract

A helmet which includes a helmet shell, a protective shield, and at least first and second fastener arrangement which respectively secure the protective shield to opposed sides of the helmet shell, and wherein each fastener arrangement includes a shock absorbing element which is engaged with and secured to a respective section of the protective shield.

Claims

1. A helmet comprising: a helmet shell having opposed first and second sides, a front end, a rear end and a lower edge, a protective shield having a closed loop structure surrounding the helmet shell and having a radial inner side, a radial outer side and keying formations in or on the protective shield, and first and second side fastening arrangements which respectively secure the protective shield to the first and second sides of the helmet shell, each side fastening arrangement respectively having first and second spaced apart components located respectively on said radial inner side of the closed loop structure and on said radial outer side of the closed loop structure, at least one resiliently deformable shock absorbing element engaged with at least one of said keying formations and located between said first and second components, and at least one fixing member engaged with the first and second components and which urges the first and second components towards each other with the at least one resiliently deformable shock absorbing element clamped between opposing surfaces of the first and second components, and with the first component opposing an outer surface of a respective side of the helmet shell.

2. The helmet according to claim 1, wherein the protective shield comprises a protective grill formed from a plurality of elongate members and a plurality of cross members respectively secured to the elongate members at spaced apart locations thereby forming a plurality of apertures which include at least some of said keying formations, and wherein each of the at least one resiliently deformable shock absorbing element is located at least partly within a respective aperture bounded by opposed portions of two of the elongate members and opposed portions of two of the cross members and is sandwiched between opposing surfaces of the first and second components.

3. The helmet according to claim 1, wherein the protective shield comprises a protective sheet material in or on which is formed said keying formations with which each of the at least one resiliently deformable shock absorbing element is engaged.

4. The helmet according to claim 1, wherein each of said first and second components comprises a respective plate.

5. The helmet according to claim 1, wherein each of the at least one resiliently deformable shock absorbing element comprises a body made from rubber.

6. The helmet according to claim 1, wherein each fixing member extends through the at least one resiliently deformable shock absorbing element and is mounted in a floating state such that it abuts the at least one resiliently deformable shock absorbing element and does not directly contact the protective shield.

7. The helmet according to claim 1, wherein the protective shield is spaced from and opposes the lower edge of the helmet shell.

8. The helmet according to claim 1 wherein each of said side fastening arrangements respectively includes a resilient bush between the first component and the said outer surface of the respective side of the helmet shell.

9. The helmet according to claim 1 wherein, in respect of each side fastening arrangement, the first and second components are substantially identical in outline and each respectively includes a cross piece and an extension piece which, in use, projects downwardly from the cross piece.

10. The helmet according to claim 9 wherein each side fastening arrangement is secured to the helmet shell at least at two spaced apart locations on the cross pieces which are in register with each other.

11. The helmet according to claim 9 which includes a plurality of said fixing members at spaced apart locations on said extension pieces.

12. The helmet according to claim 1 wherein the side fastening arrangements are configured so that the protective shield is spaced from and does not directly contact the helmet shell.

13. The helmet according to claim 2 further comprising a rear fastening arrangement for securing the protective grill to the helmet shell, the rear fastening arrangement comprising an inner component, an outer component, another resiliently deformable shock absorbing element between the inner component and the outer component and being formed with grooves which engage with sections of the elongate elements and of the cross members, and fasteners fixing the inner component, the outer component and the another resiliently deformable shock absorbing element to the rear end of the helmet shell and to the protective grill which is spaced from the lower edge of the helmet shell.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) The invention is further described by way of examples with reference to the accompanying drawings in which:

(2) FIG. 1 is a side view of a helmet according to the invention,

(3) FIG. 2 shows a rear end of a part of the helmet of FIG. 1,

(4) FIG. 3 shows an inner component of a side fastener arrangement which is used to secure a protective grille to a shell of the helmet,

(5) FIG. 4 is an exploded view in perspective of parts of the side fastener arrangement,

(6) FIG. 4A shows a different form of the arrangement in FIG. 4,

(7) FIG. 5 is a side view of a shock absorbing element which is placed over a side of the inner component shown in FIG. 3,

(8) FIG. 6 is a view in cross section, taken on a line 6-6 in FIG. 1, of a side fastener arrangement on the helmet,

(9) FIG. 7 is a perspective view of a fastening arrangement at a rear end of the helmet which is shown in FIG. 2, and

(10) FIGS. 8, 9 and 10 correspond respectively to FIGS. 1, 5 and 6 and illustrate a helmet according to another form of the invention.

DESCRIPTION OF PREFERRED EMBODIMENTS

(11) FIG. 1 of the accompanying drawings is a side view of a helmet 10 according to one form of the invention. The helmet 10 includes a helmet shell 12, a protective shield 14 in the form of a protective grille 14G, two side fastening arrangements 16 and 18 respectively, and a rear fastening arrangement 20 which is shown in more detail in FIGS. 2 and 7.

(12) Inside the helmet shell 12, but not shown in the drawings, is a shock absorbing layer which facilitates mounting of the helmet shell on the head of a user in a comfortable and shock absorbing manner. This aspect is not described further herein for in general terms it is known in the art.

(13) The helmet shell 12, which is made from a suitable material such as fiber glass or another plastics composite material, has opposed first and second sides 24 and 26 respectively, a front end 28, a rear end 30 and a lower edge 32.

(14) The protective grille 14G includes first, second and third elongate members 40, 42 and 44 respectively each of which, viewed in plan, roughly follows an oval path. The grille 14G further includes a number of cross members which are collectively designated 46. The cross members 46 are transverse to the elongate members 40 to 44 and are positioned at spaced locations to form a closed loop structure 48 with a plurality of mesh apertures 50. The cross members 46 are welded to the adjacent members 40 and 44 at respective points of contact 52.

(15) The elongate members and the cross members, in exemplary and non-limiting form, are made from steel rods or the like.

(16) The closed loop structure 48 has a radial inner side 54 and a radial outer side 56.

(17) FIG. 3 illustrates a portion of the side fastener arrangement 16, a part of the helmet shell 12 and a part of the protective grille 14G. The side fastener arrangement 18 has a similar construction to the arrangement 16 and therefore is not further described herein. FIG. 4 shows the side fastener arrangement 16 in exploded perspective form—detached from the grille.

(18) The side fastener arrangement 16 includes a first component 58 and a second component 60. The components 58 and 60 are substantially identical in outline and each comprises a respective stiff steel plate which has a cross piece 62 with spaced apart attachment holes 64 and 66.

(19) An extension piece 70 projects downwardly (in use) from the cross piece 62. The extension piece 70 and an adjacent section 74 of the grille 14G are configured so that a portion 42A of the elongate member 42 is positioned more or less at a midpoint between adjacent portions 40A and 44A of the elongate members 40 and 44, and so that the extension piece 70 overlies adjacent spaced apart cross members 46A and 46B. The design is such that a hole 78 at a junction of the cross piece 62 and the extension piece 70 directly overlies an ear of a user (not shown).

(20) An elongate slot 80 is formed in the extension piece 70.

(21) Referring to FIGS. 4, 5 and 6 the fastening arrangement 16 further includes a shock absorbing element 84.

(22) The shock absorbing element 84 includes a body 90 which is made from a shock absorbing or resiliently deformable material such as a suitable grade of polyurethane or rubber. Preferably rubber with a Shore hardness of less than 50 is used. A suitable Shore hardness which has been found to be effective in absorbing impact shock is from 20 to 30.

(23) The body 90 is sized so that, as is shown in FIG. 5, parts of the body 90 can be closely positioned inside two adjacent mesh apertures 50A and 50B respectively in the closed loop structure 48. Opposing grooves 90A and 90B are formed near respective generally linear edges of the body 90. These grooves are designed and positioned so that relevant parts of cross members 46A and 46B at opposite sides of the mesh apertures 50A and 50B can be located closely in the grooves. Additionally, the body is formed with transversely extending grooves 90C, 90D and 90E into which the portions 40A, 42A and 44A of the elongate members 40, 42 and 44, at respective edges of the mesh apertures 50A and 50B, can be located.

(24) The component 60 overlies and is in contact with what, in use, is an outer side of the body 90. The component 60, the body 90 and the component 58 are formed with respective holes 100, 102, 100 which are in register when these parts are correctly assembled, and thereby form passages which receive respective fasteners 110. As each fastener 110 is put into position and tightened the body 90 is clamped between opposing surfaces of the components 58 and 60. The portion 42A of the elongate component 42 is positioned inside the groove 90D which goes from one edge of the body 90 to an opposing edge. Each fastener 110 is preferably a flush-fitting rivet, or the like.

(25) The shock absorbing element 84 is sandwiched between the spaced apart but opposing steel plates which constitute the components 58 and 60. This is shown in FIG. 6. This laminated type of construction is strong and is able to resist direct impact forces from a high speed ball. The element 84 thus is engaged with an aperture and parts of the respective elongate and cross members which act as keying formations and vice versa.

(26) The cross pieces 62 of the two components 58 and 60 are in register with each other and fasteners 114 are engaged with the attachment holes 64 and 66 and with holes in the helmet shell 16 thereby to secure the side fastener arrangement 16 to the helmet shell—see FIG. 6. Each fastener 114 is preferably “floating” in that it has a shank 116 which is surrounded by material of the shock absorbing element 84 and does not contact the component 58 nor the component 60. Additionally, a resilient bush 118 is located between the helmet shell and the inner component 58. This enables the interface between the helmet shell and the fastener arrangement 16 to be of a shock absorbing nature.

(27) FIG. 4A shows a modification of the FIG. 4 construction in that, in place of the four holes per aperture, a single hole 100F is made in each component 58, 60 and a single registering hole 102F in the body 90 for a single fastener (not shown—three in total), to achieve a laminate in which the body 90 is tightly clamped between the components 58 and 60 in a manner which is effectively non-slip, but which is capable of absorbing an impact shock by resiliently deforming the body 90.

(28) Details of the rear fastening arrangement 20 are shown in FIG. 2 and in FIG. 7. In concept the fastening arrangement 20 is similar to the fastening arrangement 16 although the concept is embodied in a construction which is smaller, physically, than what is employed in each side fastening arrangement 16, 18.

(29) The fastening arrangement 20 thus has an inner component 120 and an outer component 122 each of which is formed from a respective stiff steel plate, and a resiliently deformable shock absorbing element 124 which is between the components and which is formed with grooves which engage with corresponding sections of the elongate elements 40, 42 and 44 at the rear end of the helmet shell and with cross members 46P and 46Q which are transverse to and welded to the elongate members. The shock absorbing element 124 can be resiliently deformed but it is not capable of escaping from the closure which is formed by the parts referred to.

(30) The shock absorbing arrangements 16, 18, 20 which fix the closed loop structure 48 of the protective grille 14G to the helmet shell 12 are lightweight and are configured not to obstruct the visibility of a wearer of the helmet nor to interfere with the transmission of sound to the ears of the user. If a ball should strike the protective grille 14G from practically any direction the shock absorbing elements in the respective fastening arrangements 16, 18, 20 are deformed to a greater or lesser extent depending on the force of impact of the ball. The degree of deformation is dependent at least on the physical size of each element and its hardness. As noted each element may be perforated or aerated to control a deformation vs force characteristic. Also, by forming an aperture in the components 58 and 60, such as the elongate slot 80, the clamping effect of the plates is reduced, and an opening is formed into which a part of the shock absorbing element can be forced, with an extruding-type action.

(31) The protective shield is spaced from, and does not directly contact, the helmet shell. Shock forces are not transferred to the shell via the shock absorbing elements. For an application like cricket, the shell is preferably spaced from the lower edge of the helmet. However, depending on the application a part of the helmet, or the entire shell may extend above and below the lower edge—the invention is not limited in this respect.

(32) The deformation process is accompanied by the transmission of force from a ball impacting on the protective grille, to the helmet shell 12, but this is through the intermediary of the shock absorbing, resiliently deformable, elements. The degree of force which is transmitted is thus reduced by the amount of force which is absorbed in the process of deforming the shock absorbing element. The helmet shell 12, in turn, is engaged with a user's head via an intermediate shock absorbing liner inside the helmet shell. Thus, although the transmission of force to the user's head is not eliminated, the magnitude of the force which is so transmitted is much reduced.

(33) Upon impact the shock absorbing element remains connected in a non-slip manner to the grille due to the keying formations which are engaged with the element. The element can however deform under the impact and in this way help to absorb the shock and so provide protection for the wearer of the helmet.

(34) The closed loop structure 48 provides all-round protection against impact, say from a ball, for the head and neck of a user. Impact force on the closed loop structure 48 is transmitted in what may be referred to as a “circumferential” manner by the looped elongate members 40, 42 and 44 and, consequently, each fastening arrangement 16, 18, 20 is capable of absorbing some of the impact force via the respective shock absorbing elements. In each fastening arrangement 16, 18, 20 the spaced apart plates and the intermediate shock absorbing element provide a laminated form of structure which is resistant to bending and which thus provides protection against direct side impact. Nonetheless via the intermediate shock absorbing element between the plates forces on the closed loop structure 48 are dispersed circumferentially and absorbed in the manner which has been described.

(35) FIGS. 8 to 10 correspond to FIGS. 1, 5 and 6 respectively but illustrate an arrangement in which the protective shield 14 is modified in that the protective grille 14G is replaced by a protective sheet material 14S. The sheet material 14S (by way of example only) follows the outline of the grille 14G and also forms a closed loop structure. The sheet material comprises a tough plastics material which is impact and shock resistant.

(36) The principles outlined in connection with FIGS. 1 to 7 apply to the configuration shown in FIGS. 8 to 10. For this reason like reference numerals with the suffix S are used to designate like components. However the protective sheet material is formed on each of two opposing sides 24A and 26A, respectively adjacent the sides 24 and 26 of the helmet shell 12, with keying formations which, in this example, are in the form of apertures 150 and 152 respectively which broadly correspond to the mesh apertures 50A and 50B shown in FIG. 5. A solid strip 154 of the sheet material is between the two apertures 150 and 152 which are flanked above and below by solid strips 156 and 158 of the sheet material and on the sides by edges 160, 162, 164 and 166 of the sheet material.

(37) FIG. 9 illustrates one side of the arrangement—a similar configuration is adopted on the opposing side.

(38) The shock absorbing element 84S is configured so that portions 150X and 152X thereof occupy the apertures 150 and 152 and so that outer surfaces 84X and 84Y of the element 84S closely contact opposing inner surfaces of the components 58S and 60S. Fasteners 110S pass through registering holes in the components 58S and 60S and in the shock absorbing element 84S. Shanks 170 of the fasteners 110S are floating in that they are spaced from sides of the strips 154, 156 and 158, and from sides of the edges 160, 162, 164 and 166. The sheet material, under impact, can thus move as the material of the shock absorbing element is deformed between each shank and an opposing surface of the sheet material. Thus if the shield 14 is impacted by a ball or other object the shock absorbing material 84S sandwiched between the components 58S and 60S can deform and absorb a substantial part of the shock. Impact loading is also transferred, as appropriate, to the rear end of the helmet which is configured in a similar way to what has been shown in FIG. 9.

(39) Alternatively or additionally to the apertures 150, 152 in the sheet material, keying formations of a different kind e.g. projections can be formed in or fixed to the sheet material—the element 84S is then formed with formations of a complementary shape to the keying formations so that engagement of the element 84S with the sheet material 14S is effected in a non-slip, yet resiliently deformable, shock-absorbing manner.

(40) The laminated structure of each fastening arrangement 16S, 18S absorbs shock loading in the manner described and also transfers loading to the helmet shell through the intermediary of the associated shock absorbing attachments 118S and fasteners 114S.