EP2042048B1 - A composite crash helmet - Google Patents
A composite crash helmet Download PDFInfo
- Publication number
- EP2042048B1 EP2042048B1 EP08016618A EP08016618A EP2042048B1 EP 2042048 B1 EP2042048 B1 EP 2042048B1 EP 08016618 A EP08016618 A EP 08016618A EP 08016618 A EP08016618 A EP 08016618A EP 2042048 B1 EP2042048 B1 EP 2042048B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- crash helmet
- wall
- helmet according
- shell
- crash
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Not-in-force
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Classifications
-
- A—HUMAN NECESSITIES
- A42—HEADWEAR
- A42B—HATS; HEAD COVERINGS
- A42B3/00—Helmets; Helmet covers ; Other protective head coverings
- A42B3/04—Parts, details or accessories of helmets
- A42B3/08—Chin straps or similar retention devices
-
- A—HUMAN NECESSITIES
- A42—HEADWEAR
- A42B—HATS; HEAD COVERINGS
- A42B3/00—Helmets; Helmet covers ; Other protective head coverings
- A42B3/04—Parts, details or accessories of helmets
- A42B3/10—Linings
- A42B3/12—Cushioning devices
- A42B3/125—Cushioning devices with a padded structure, e.g. foam
Definitions
- the present invention relates to a crash helmet for motor-cyclists, and, more generally, people engaged in various activities requiring a protective helmet.
- a crash helmet 10 comprises an outer shell 11 which forms a bubble 12 with a base portion 12a and a chin protector 13.
- a layer 30 of expanded polystyrene covers the inner surface of the bubble and fills an annular gap bounded on the outside by the chin protector and the bubble base portion, and on the inside by an annular wall 20 located within and at a distance from the base portion of the bubble and from the chin protector.
- the polystyrene layer 30 firmly connects the inner band 20 to the outer shell 11.
- two anchoring devices 23 are used, each including a tubular spacer 24 radially extending from the outer shell 11 to the inner wall 20.
- the spacers 24 are rigidly fixed to an anchoring member 31 having a large surface.
- the anchoring member 31 is embedded in the polystyrene which is injected within the shell 11.
- Formed in the inner wall 20 and the outer shell 11 are aligned bores 27, 22, respectively, for fitting an expansion stud 35 in the tubular spacer 24 from the inside, and a cap 36 on the outside.
- a crash helmet 10 according to the invention comprises an outer shell 11 forming a bubble 12, a reinforcing wall 20 located within and at a distance from the shell 11, and a layer 30 of expanded polystyrene injected onto the inner surface of the bubble and into the intermediate gap 14 delimited by the inner reinforcing wall 20 and the outer shell 11.
- the invention is equally applicable to full-face crash helmets with a chin protector ( Figure 4 ) and open-face crash helmets, i.e. having no chin protector.
- the inner wall 20 may take a closed loop shape in plan view, or an open ring shape, or an arched U-shape.
- FIG 3 two straps for fastening the crash helmet are labelled 26a, 26b.
- a respective anchoring body is provided for anchoring each strap, on each of the opposite (left and right) sides of the helmet.
- the anchoring body indicated overall at 31, is variously shaped and embedded in the polystyrene 30.
- the anchoring device performs the function of a tension member between the relevant strap and the outer shell 11.
- the tension member 31, shown separately in Figure 6 extends between a first, lower inner stud 35 and a second, upper outer stud 40.
- the first stud is fixed to an end of the strap and passes through an opening 27 (indicated in Figure 3A ) formed in the inner reinforcing wall 20.
- the second stud 40 cooperates in a tensile relationship with the shell 11 by means of a plate 41.
- the plate 41 per se of known design, bears upon a relatively large area of the outer surface of the shell 11.
- the visor 42 is pivotally mounted on the plate 41.
- the tension member ante 31 has bores 43, 44, more clearly visible in Figure 6 , for engaging the studs 35, 40, respectively.
- each plate 41 is accommodated in a relevant recess 45 formed by the outer shell and having a shape congruent with the outer peripheral edge of the plate. This allows to increase the contribution given by the shell in terms of reaction to the tensile forces exerted by the tensile member. If, as in the illustrated embodiment of figures 3 and 3A , the plate is rotationally locked on the outer shell by means of a screw 46, the tensile member 31 may advantageously exploit that screw as a further grip for binding it to the outer shell. A special bore 47 for the screw 46 is also provided in the tension member 31 ( Figure 5 ).
- the tension member 31 is so shaped as to have a high surface/volume ratio, in order to remain firmly anchored in the polystyrene and therefore tightly connected to the other parts of the helmet.
- the particular reticular construction shown in figure 5 is a preferred, exemplary embodiment.
- the embodiments shown in Figures 4 and 6 are particularly preferred.
- the inner wall 20 extends continuously, following an arched or closed loop path within the shell, and includes a portion 20a running along the front or forehead area of the helmet above the opening closed by the visor. Also along this forehead area, which is particularly critical for accidents, the wall 20 defines with the inside of the shell 11 a space or gap in which the polystyrene 30 is injected. Thus, also in this area the inner wall 20 is firmly fixed by the polystyrene to the outer shell. Should an impact occur on this forehead portion of the helmet, the wall 20 will actively cooperate with the outer shell in resisting the crash, diffusing and dissipating the energy of the impact to other parts of the helmet.
- the wall 20 which extends as a crown along the inside of the helmet, besides reinforcing the forehead zone, is further helpful in positioning the tension members correctly during the polystyrene injection step due to protruding portions 20b ( Figure 3A ) engaging each tension member.
- the inner wall 20 consists of an extended structural element made in one piece
- the wall 20 is made up jointly by two separately formed members: a front, arched strip 20a running across the forehead area, and a back arched strip 20c joined to the front strip 20a by two pairs of rivets 20d near the ends of these strips.
- the wall 20 is made up, on each side of the helmet, by a relevant plate portion 20e of limited extent.
- the chin protector may be manufactured separately from the bubble12, as shown in Figure 4 .
- the chin protector 13 is formed by a separate member having a U shape in plan view.
- the chin protector 13 is fixed to the bubble 12 by two sets of horizontal plastic pins 48 protruding from the two arms of the chin protector and fitted into bore provided in a folded edge of the inner wall 20.
- the chin protector can be made of a material different from the one of the bubble, for example a more elastically yieldable material.
- the end surfaces 15 of the arch of the chin protector are concave so as to allow a form fitting with corresponding convex surfaces 16 of the bubble.
- This arrangement makes the chin protector more resistant to shearing stress in a vertical direction, and allows the manufacturer to use a same mould for manufacturing either full face or open face crash helmets.
- An elastic gasket (not shown) may be located at the interface between the chin protector and the bubble.
- this wall may be thin and therefore light.
- the crash helmet according to the invention is free of rigid spacers extending radially inwards from the outer shell.
- the invention is not intended to be limited to the embodiments described and illustrated herein, which should be considered as exemplary embodiments of the crash helmet; rather, the invention may be modified with regard to the shape, the size, the arrangement of parts, and to constructional and materials used.
- the tension members 31 and the inner wall 20 may be formed as a single piece.
Abstract
Description
- The present invention relates to a crash helmet for motor-cyclists, and, more generally, people engaged in various activities requiring a protective helmet.
- For a better understanding of the state of the art and problems related thereto, there will be at first described a crash helmet of the kind known from European patent application
EP 1 627 575 , reference being made tofigures 1 and 2 of the appended drawings. Acrash helmet 10 comprises anouter shell 11 which forms abubble 12 with abase portion 12a and achin protector 13. Alayer 30 of expanded polystyrene covers the inner surface of the bubble and fills an annular gap bounded on the outside by the chin protector and the bubble base portion, and on the inside by anannular wall 20 located within and at a distance from the base portion of the bubble and from the chin protector. Thepolystyrene layer 30 firmly connects theinner band 20 to theouter shell 11. - In order to fix the straps to fasten under the chin of the user to hold the helmet fast, two
anchoring devices 23 are used, each including atubular spacer 24 radially extending from theouter shell 11 to theinner wall 20. Thespacers 24 are rigidly fixed to an anchoringmember 31 having a large surface. The anchoringmember 31 is embedded in the polystyrene which is injected within theshell 11. Formed in theinner wall 20 and theouter shell 11 are alignedbores expansion stud 35 in thetubular spacer 24 from the inside, and acap 36 on the outside. - In the event of an impact, tensile forces are transmitted from the strap to the
inner wall 20, and part of them are transferred to theanchoring device 23 and so to theouter shell 11. During the impact, the spacer acts as a fulcrum, and the outer shell provides an essentially shearing reaction, indicated by arrow A. - It is a general object of the present invention to provide a crash helmet having an improved structure in order to optimize the transmission and distribution of the forces that occur during an impact. Another object of the invention is to simplify the manufacturing process of the helmet and cut down relevant costs.
- These and other objects and advantages which will be seen more clearly herein after, are achieved in accordance with the invention, by a crash helmet having the features defined in the appended claims.
- A few preferred, but not limiting embodiments of the invention will now be described, reference being made to the attached drawings, in which:
-
Figure 1 is a side view in vertical cross-section of a crash helmet of known design; -
Figure 2 is a partial cross-sectional view, to an enlarged scale, showing an anchoring device for strap of the helmet offigure 1 ; -
Figure 3 is a front view in vertical cross-section of a first embodiment of a crash helmet according to the present invention; -
Figure 3A is an enlarged view of a detail ofFigure 3 ; -
Figure 4 is a side view in vertical cross-section of the crash helmet ofFigure 3 ; -
Figure 5 is a side view of a tension member incorporated in the helmet according to the invention; and -
Figures 6 an 7 are side views of further embodiments of the crash helmet according to the invention. - Referring now to
Figures 3 to 7 , acrash helmet 10 according to the invention comprises anouter shell 11 forming abubble 12, a reinforcingwall 20 located within and at a distance from theshell 11, and alayer 30 of expanded polystyrene injected onto the inner surface of the bubble and into theintermediate gap 14 delimited by the inner reinforcingwall 20 and theouter shell 11. - In many of its aspects, the invention is equally applicable to full-face crash helmets with a chin protector (
Figure 4 ) and open-face crash helmets, i.e. having no chin protector. Depending on requirements and the kind of helmet, theinner wall 20 may take a closed loop shape in plan view, or an open ring shape, or an arched U-shape. - In
Figure 3 , two straps for fastening the crash helmet are labelled 26a, 26b. For anchoring each strap, on each of the opposite (left and right) sides of the helmet, a respective anchoring body is provided. The anchoring body, indicated overall at 31, is variously shaped and embedded in thepolystyrene 30. According to an important feature of this invention, the anchoring device performs the function of a tension member between the relevant strap and theouter shell 11. Thetension member 31, shown separately inFigure 6 , extends between a first, lowerinner stud 35 and a second, upperouter stud 40. The first stud is fixed to an end of the strap and passes through an opening 27 (indicated inFigure 3A ) formed in the inner reinforcingwall 20. Thesecond stud 40 cooperates in a tensile relationship with theshell 11 by means of aplate 41. Theplate 41, per se of known design, bears upon a relatively large area of the outer surface of theshell 11. Thevisor 42 is pivotally mounted on theplate 41. The tension member ante 31 hasbores Figure 6 , for engaging thestuds - When a crash occurs, tensile forces exerted by the fastening straps are transmitted by the
tension members 31 to theplats 41 and distributed on the contact surfaces at the interface between the plates and theouter shell 11. - In a preferred embodiment, each
plate 41 is accommodated in arelevant recess 45 formed by the outer shell and having a shape congruent with the outer peripheral edge of the plate. This allows to increase the contribution given by the shell in terms of reaction to the tensile forces exerted by the tensile member. If, as in the illustrated embodiment offigures 3 and3A , the plate is rotationally locked on the outer shell by means of ascrew 46, thetensile member 31 may advantageously exploit that screw as a further grip for binding it to the outer shell. Aspecial bore 47 for thescrew 46 is also provided in the tension member 31 (Figure 5 ). Preferably, thetension member 31 is so shaped as to have a high surface/volume ratio, in order to remain firmly anchored in the polystyrene and therefore tightly connected to the other parts of the helmet. The particular reticular construction shown infigure 5 is a preferred, exemplary embodiment. - Still referring to the
inner wall 20, the embodiments shown inFigures 4 and6 are particularly preferred. In those variant embodiments, theinner wall 20 extends continuously, following an arched or closed loop path within the shell, and includes aportion 20a running along the front or forehead area of the helmet above the opening closed by the visor. Also along this forehead area, which is particularly critical for accidents, thewall 20 defines with the inside of the shell 11 a space or gap in which thepolystyrene 30 is injected. Thus, also in this area theinner wall 20 is firmly fixed by the polystyrene to the outer shell. Should an impact occur on this forehead portion of the helmet, thewall 20 will actively cooperate with the outer shell in resisting the crash, diffusing and dissipating the energy of the impact to other parts of the helmet. Due to the contribution given by the inner wall and the polystyrene layer interposed between this and the outer shell, the thickness of the shell may be reduced, and consequently the overall weight of the helmet. Thewall 20, which extends as a crown along the inside of the helmet, besides reinforcing the forehead zone, is further helpful in positioning the tension members correctly during the polystyrene injection step due to protrudingportions 20b (Figure 3A ) engaging each tension member. - Whereas in the embodiment of
Figure 6 theinner wall 20 consists of an extended structural element made in one piece, in the embodiment ofFigure 4 thewall 20 is made up jointly by two separately formed members: a front,arched strip 20a running across the forehead area, and a backarched strip 20c joined to thefront strip 20a by two pairs ofrivets 20d near the ends of these strips. In a different embodiment of the invention, as shown infigure 7 , thewall 20 is made up, on each side of the helmet, by arelevant plate portion 20e of limited extent. - The chin protector may be manufactured separately from the bubble12, as shown in
Figure 4 . Thechin protector 13 is formed by a separate member having a U shape in plan view. Thechin protector 13 is fixed to thebubble 12 by two sets of horizontalplastic pins 48 protruding from the two arms of the chin protector and fitted into bore provided in a folded edge of theinner wall 20. According to requirements, the chin protector can be made of a material different from the one of the bubble, for example a more elastically yieldable material. Advantageously, theend surfaces 15 of the arch of the chin protector are concave so as to allow a form fitting with correspondingconvex surfaces 16 of the bubble. This arrangement makes the chin protector more resistant to shearing stress in a vertical direction, and allows the manufacturer to use a same mould for manufacturing either full face or open face crash helmets. An elastic gasket (not shown) may be located at the interface between the chin protector and the bubble. - As will be appreciated, due to the
tension members 31 the tensile forces acting on the straps are transferred to the outer shell, which is a very strong structural member. Forces are spread uniformly distributed over a large area at the interface between theplates 41 and outer shell. The resulting stresses are low and therefore it will not be necessary to provide any thickened portion, not even locally, in the outer shell; this favours the overall lightness of the crash helmet. - The absence of a bore to be made through the outer shell, aligned with the bore for the strap fixing stud entails a simplified manufacture, since it is not required to ensure accurate alignment between the bore in the inner reinforcing
wall 20 and the (absent) bore in the outer shell. Furthermore, a closure cap on either side of the crash helmet is disposed of. - Since the tensile forces are transferred from the straps to the outer shell through the tensile members, and do not have to be borne conspicuously by the
inner wall 20, this wall may be thin and therefore light. - Moreover, it will be noted that the crash helmet according to the invention is free of rigid spacers extending radially inwards from the outer shell. The absence of spacing members of that kind, which are capable of transferring side impacts without shortening appreciably, makes the helmet safer in case of side collisions occurring.
- The invention is not intended to be limited to the embodiments described and illustrated herein, which should be considered as exemplary embodiments of the crash helmet; rather, the invention may be modified with regard to the shape, the size, the arrangement of parts, and to constructional and materials used. For example, in a further embodiment (not shown), the
tension members 31 and theinner wall 20 may be formed as a single piece.
Claims (17)
- A crash helmet comprising:- an outer shell (11),- binding means for binding the ends of a pair of fastening straps (26a, 26b) located at the left and right sides within the helmet,- at least one inner wall (20) spaced apart from the shell at least at the zones of the ends of the straps,- an expanded-polystyrene layer (30) injected between the shell and the inner wall (20),- for each strap, an anchoring element (31) embedded in the polystyrene (30) and first connecting means (35) between the anchoring element and the end of the strap,each anchoring element (31) extends as a tension member between the inner wall (20) and the shell (11) and is firmly fixed to the shell by means of second connecting means (40), whereby each strap cooperates in tensile relation with the outer shell so as to transmit tensile forces thereto through the anchoring element (31),
characterized in that each of the second connecting means (40) is associated with a relevant plate (41) having an extended surface of contact with the outer shell so as to distribute on this shell the forces transmitted through the anchoring tension member (31). - A crash helmet according to claim 1, characterized in that each plate (41) is accommodated in a relevant recess (45) of the outer shell (11) having a shape substantially congruent to that of the plate (41).
- A crash helmet according to claim 1 or 2, characterized in that the second connecting means (40) are located at positions which are higher up with respect to the first connection means (35).
- A crash helmet according to claim 1, characterized in that the anchoring tension member (31) is an element having an extended surface with respective bores (43, 44) for the passage of the first and second connecting means (35, 40).
- A crash helmet according to claim 1, characterized in that the anchoring tension member (31) has a reticular structure.
- A crash helmet according to any one of the preceding claims, characterized in that the inner wall (20) extends continuously adjoining the lateral zones where the straps are anchored and comprises a portion (20a) running along a forehead area of the helmet above an opening closed by a visor (42), said inner wall portion (20a) being connected to the outer shell (11) by expanded-polystyrene (30) injected between these two components.
- A crash helmet according to claim 6, characterized in that the inner wall (20) extends continuously along a substantially closed-loop path within the shell (11).
- A crash helmet according to claim 6 or 7, characterized in that the inner wall (20) consists of an extended structural element formed in one piece.
- A crash helmet according to claim 6 or 7, characterized in that the inner wall (20) is the wall 20 is made up jointly by two separately formed members: a front, arched strip (20a) running across the forehead area, and a back arched strip (20c) joined to the front strip (20a) by fastening means (20d).
- A crash helmet according to any one of the preceding claims, characterized in that the inner wall (20) and the anchoring tension members (31) are formed as a single piece.
- A crash helmet according to any one of the preceding claims, characterized in that it is a full face crash helmet.
- A crash helmet according claim 11, characterized by comprising a substantially U-shaped chin protector (13) manufactured separately from the bubble (12) and fixed thereto.
- A crash helmet according claim 12, characterized in that the chin protector (13) has concave end surfaces (15) coupled with corresponding convex surfaces (16) of the bubble (12).
- A crash helmet according to claim 11, characterized in that the chin protector (13) is made of materials being mechanically more resistant than those which the bubble (12) is made of.
- A crash helmet according to any one of claims 1 to 10, characterized in that it is an open face crash helmet, without a chin protector.
- A crash helmet according to any one of the preceding claims, characterized in that the inner wall (20) provides, on both the left and right sides of the helmet, respective formations (20b) adapted for engaging a respective anchoring tension member (31) so as to keep it correctly positioned during the manufacturing step of injecting the expanded-polystyrene.
- A crash helmet according to claim 1, characterized in that the wall (20) is provided, on each side of the helmet, with a relevant plate portion (20e) of limited extent.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT000670A ITTO20070670A1 (en) | 2007-09-25 | 2007-09-25 | COMPOSITE HELMET |
Publications (3)
Publication Number | Publication Date |
---|---|
EP2042048A2 EP2042048A2 (en) | 2009-04-01 |
EP2042048A3 EP2042048A3 (en) | 2009-06-17 |
EP2042048B1 true EP2042048B1 (en) | 2010-12-01 |
Family
ID=40032468
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08016618A Not-in-force EP2042048B1 (en) | 2007-09-25 | 2008-09-22 | A composite crash helmet |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP2042048B1 (en) |
AT (1) | ATE489862T1 (en) |
DE (1) | DE602008003726D1 (en) |
IT (1) | ITTO20070670A1 (en) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9763488B2 (en) | 2011-09-09 | 2017-09-19 | Riddell, Inc. | Protective sports helmet |
US10159296B2 (en) | 2013-01-18 | 2018-12-25 | Riddell, Inc. | System and method for custom forming a protective helmet for a customer's head |
EP3048918A4 (en) | 2013-12-06 | 2017-06-14 | Bell Sports, Inc. | Flexible multi-layer helmet and method for making the same |
CA3207551A1 (en) | 2014-10-28 | 2016-05-06 | Bell Sports, Inc. | In-mold rotation helmet |
WO2018017867A1 (en) | 2016-07-20 | 2018-01-25 | Riddell, Inc. | System and methods for designing and manufacturing a bespoke protective sports helmet |
US11399589B2 (en) | 2018-08-16 | 2022-08-02 | Riddell, Inc. | System and method for designing and manufacturing a protective helmet tailored to a selected group of helmet wearers |
WO2020107005A1 (en) | 2018-11-21 | 2020-05-28 | Riddell, Inc. | Protective recreational sports helmet with components additively manufactured to manage impact forces |
USD927084S1 (en) | 2018-11-22 | 2021-08-03 | Riddell, Inc. | Pad member of an internal padding assembly of a protective sports helmet |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU476110B2 (en) | 1973-05-14 | 1976-09-09 | ARAI and MICHIO ARAI HIROTAKA | Helmet structure |
IT8022317V0 (en) * | 1980-07-16 | 1980-07-16 | Nava Pier Luigi | DEVICE FOR FASTENING THE HELMET BELT AND SIMILAR. |
IT1146332B (en) * | 1981-10-14 | 1986-11-12 | Mpa Mecc Plastica Agordina | PERFECT ATTACHMENT WITH SNAP LACING FOR STRAP HELMET OF PROTECTIVE HELMET |
CH654728A5 (en) | 1983-05-11 | 1986-03-14 | Kiwi Sa | PROTECTIVE HELMET FOR MOTORCYCLES AND MOPED RIDERS. |
SE9000922L (en) * | 1990-03-15 | 1991-09-16 | Rex Handels Ind Ab | DEVICE AT HELMET |
JPH0638091Y2 (en) | 1991-02-21 | 1994-10-05 | 昭栄化工株式会社 | Helmet |
SE468458B (en) * | 1991-09-16 | 1993-01-25 | Thule Ind Ab | DEVICE FOR THE FIXING OF A TAPE BELT IN A HELMET |
DE19705541A1 (en) | 1997-02-14 | 1998-08-20 | Bayerische Motoren Werke Ag | Protective helmet with hinged chin section |
US6711751B1 (en) | 2001-03-08 | 2004-03-30 | K-2 Corporation | Mounting system for helmets |
ITTO20040569A1 (en) * | 2004-08-17 | 2004-11-17 | Dsg Helmet S R L | FULL FACE HELMET AND PROCEDURE FOR ITS MANUFACTURE |
-
2007
- 2007-09-25 IT IT000670A patent/ITTO20070670A1/en unknown
-
2008
- 2008-09-22 AT AT08016618T patent/ATE489862T1/en not_active IP Right Cessation
- 2008-09-22 EP EP08016618A patent/EP2042048B1/en not_active Not-in-force
- 2008-09-22 DE DE602008003726T patent/DE602008003726D1/en active Active
Also Published As
Publication number | Publication date |
---|---|
DE602008003726D1 (en) | 2011-01-13 |
EP2042048A2 (en) | 2009-04-01 |
ATE489862T1 (en) | 2010-12-15 |
ITTO20070670A1 (en) | 2009-03-26 |
EP2042048A3 (en) | 2009-06-17 |
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