AU2024203052A1 - A helmet and manufacture thereof - Google Patents

A helmet and manufacture thereof Download PDF

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Publication number
AU2024203052A1
AU2024203052A1 AU2024203052A AU2024203052A AU2024203052A1 AU 2024203052 A1 AU2024203052 A1 AU 2024203052A1 AU 2024203052 A AU2024203052 A AU 2024203052A AU 2024203052 A AU2024203052 A AU 2024203052A AU 2024203052 A1 AU2024203052 A1 AU 2024203052A1
Authority
AU
Australia
Prior art keywords
shell
helmet
inner shell
density
outer shell
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.)
Pending
Application number
AU2024203052A
Inventor
Allen Ronald MCMILLAN
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Racing Australia Ltd
Original Assignee
Racing Australia Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from AU2017900369A external-priority patent/AU2017900369A0/en
Application filed by Racing Australia Ltd filed Critical Racing Australia Ltd
Priority to AU2024203052A priority Critical patent/AU2024203052A1/en
Publication of AU2024203052A1 publication Critical patent/AU2024203052A1/en
Pending legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A42—HEADWEAR
    • A42C—MANUFACTURING OR TRIMMING HEAD COVERINGS, e.g. HATS
    • A42C2/00—Manufacturing helmets by processes not otherwise provided for
    • A42C2/002—In-mould forming
    • 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
    • A42B3/06—Impact-absorbing shells, e.g. of crash helmets
    • A42B3/062—Impact-absorbing shells, e.g. of crash helmets with reinforcing means
    • A42B3/063—Impact-absorbing shells, e.g. of crash helmets with reinforcing means using layered structures
    • 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
    • A42B3/128—Cushioning devices with a padded structure, e.g. foam with zones of different density
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B1/00—Layered products having a non-planar shape
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/065—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of foam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/12—Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
    • B32B27/365—Layered products comprising a layer of synthetic resin comprising polyesters comprising polycarbonates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/02—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions
    • B32B3/08—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions characterised by added members at particular parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/18—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer of foamed material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/03—3 layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/10—Inorganic fibres
    • B32B2262/101—Glass fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/10—Inorganic fibres
    • B32B2262/106—Carbon fibres, e.g. graphite fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2266/00—Composition of foam
    • B32B2266/02—Organic
    • B32B2266/0214—Materials belonging to B32B27/00
    • B32B2266/0221—Vinyl resin
    • B32B2266/0228—Aromatic vinyl resin, e.g. styrenic (co)polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/558—Impact strength, toughness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/72—Density
    • B32B2307/722—Non-uniform density
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/732—Dimensional properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2437/00—Clothing
    • B32B2437/04—Caps, helmets

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Helmets And Other Head Coverings (AREA)

Abstract

AHELMETANDMANUFACTURETHEREOF Abstract A helmet for equestrian sports comprising an outer shell and an inner shell moulded in the outer shell so that the inner shell is bonded to the outer shell and a method for manufacturing the helmet.

Description

AHELMETANDMANUFACTURETHEREOF
Related Application
[001] The present application is a divisional application of Australian Patent Application No. 2018217432, which is a national stage of International Patent Application No. PCT/AU2018/050088 filed on 7 February 2018, which claims priority from Australian Provisional Patent Application No 2017900369, filed on 7 February 2017, the disclosures of which are hereby expressly incorporated by reference in their entireties.
Field of the Invention
[002] The present invention relates to a helmet. In particular, the invention relates, but is not limited, to a helmet for equestrian sports and to a method of manufacturing the helmet.
Background of the Invention
[003] Any reference to or discussion of any document, act or item of knowledge in this specification is included solely for the purpose of providing a context for the present invention. It is not suggested or represented that any of these matters or any combination thereof formed at the priority date part of the common general knowledge, or was known to be relevant to an attempt to solve any problem with which this specification is concerned.
[004] Racing Australia introduced a high performance equestrian standard for helmets in 2012 called ARB HS 2012. The standard required the helmets to pass impact requirements over a range of impact forces for each individual test, rather than one impact force for each test. The standard also increased the impact attenuation properties of the helmet.
[005] However, at the time of filing the present application the standard has not been enforced because no existing commercially available helmets have been able to meet the standard.
[006] Accordingly, it would be desirable to provide a helmet that meets Racing Australia's stringent new standard for helmets.
Summary of the Invention
[007] According to a first aspect of the present invention there is provided a helmet for equestrian sports comprising:
an outer shell; and an inner shell moulded in the outer shell so that the inner shell is bonded to the outer shell.
[008] In an embodiment, the helmet further comprises an intermediate shell located between the outer shell and the inner shell.
[009] In an embodiment, the intermediate shell is located in at least a side portion of the helmet.
[010] In an embodiment, the intermediate shell is formed as a annular or cylindrical band.
[011] In an embodiment, the inner shell has non-uniform density.
[012] In an embodiment, the inner shell comprises a cranium portion that has a lower density and front, back and side portions of the inner shell have higher densities.
[013] In an embodiment, the lower density portion has a density in the range of about 35 g/L whereas the higher density portions have a density in the range of about 45 - 70 g/L.
[014] In an embodiment, the inner shell is formed from expanded polystyrene.
[015] In an embodiment, the inner shell is formed from a different material compared to the intermediate shell and/or the outer shell.
[016] In an embodiment, the helmet also comprises a lower shell that is attached to an edge of the outer shell.
[017] In an embodiment, the lower shell is U-shaped in cross-section.
[018] In an embodiment, the lower shell defines opposed side walls and the inner shell has a portion located between the opposed side walls of the lower shell.
[019] In an embodiment, the lower shell is formed from a different material compared to the inner shell, intermediate shell and/or outer shell.
[020] In an embodiment, the helmet meets Australia Standard ARB HS 2012.
[021] According to second aspect of the present invention there is provided a method of manufacturing a helmet for equestrian sports, the method comprising: a) forming an outer shell; b) placing the outer shell in a mould; and c) forming an inner shell in the mould.
[022] In an embodiment, the method further comprises forming an intermediate shell in the mould prior to forming the inner shell, wherein the intermediate shell is located between the outer shell and the inner shell.
[023] In an embodiment, the intermediate shell is located in at least a side portion of the helmet.
[024] In an embodiment, the intermediate shell is formed as an annular or cylindrical band.
[025] In an embodiment, the inner shell is formed with a non-uniform density.
[026] In an embodiment, step c) comprises forming the inner shell with a cranium portion that has a lower density and front, back and side portions of the inner shell have higher densities.
[027] In an embodiment, the lower density portion has a density in the range of about 35 g/L whereas the higher density portions have a density in the range of about 45 - 70 g/L.
[028] In an embodiment, the inner shell is formed from expanded polystyrene.
[029] In an embodiment, the inner shell is formed from a different material compared to the intermediate shell and/or the outer shell.
[030] In an embodiment, the method further comprises forming a lower shell in the mould prior to forming the inner shell so that the lower shell is attached to an edge of the outer shell.
[031] In an embodiment, the lower shell is U-shaped in cross-section.
[032] In an embodiment, the lower shell defines opposed side walls, whereby forming the inner shell in step c) comprises forming the inner shell between the opposed side walls of the lower shell.
[033] In an embodiment, the lower shell is formed from a different material compared to the inner shell, intermediate shell and/or outer shell.
[034] In an embodiment, the outer shell is formed by injection moulding or vacuum moulding.
[035] According to a third aspect of the present invention there is provided a helmet for equestrian sports meeting Australia Standard ARB HS 2012 made by the method of the second aspect.
Brief Description of the Drawings
[036] Embodiments of the present invention will now be described, by way of example only, with reference to the accompanying Figures in which: Figure 1 is a cross-sectional view of a helmet according an embodiment of the present invention;
Figure 2A is a cross-sectional view of a helmet according to another embodiment of the present invention; and
Figure 2B is a magnified view of a portion of the helmet of Figure 2A.
Detailed Description
[037] Referring to Figure 1, a helmet 10 according to an embodiment of the present invention is shown in cross-section.
[038] The helmet 10 comprises an outer shell 11 that forms a dome to define the external shape of the helmet. The outer shell 11 is formed by injection moulding or vacuum moulding a suitable polymeric material such as polycarbonate. However, in other embodiments, the outer shell 11 is formed by moulding glass and/or carbon fibre. Injection moulding enables the outer shell to be formed with a consistent wall section at low cost. Vacuum moulding is better when producing a helmet with vents and for colouring and design (as injection moulding can only produce a single colour outer shell). Furthermore, vacuum moulding enables the outer shell to be formed with very thin wall section (<2 mm thick) to reduce the weight of the outer shell in regions which do not require as much impact protection.
[039] The helmet 10 also comprises a first inner shell 12 that is formed from a hard polymeric material such as polycarbonate. The first inner shell 12 is "in-moulded" with respect to the outer shell 11. This involves placing the already formed outer shell 11 into a mould and forming the first inner shell 12 with the outer shell 11 in the mould. This results in the first inner shell 12 being bonded to the outer shell 11 which increases the strength, rigidity, crush resistance and puncture resistance of the helmet 10.
[040] The first inner shell 12 is shaped, at least in part, as a ring or annular/cylindrical band that extends around the front, back and sides of the helmet 10. That is, the first inner shell 12 forms a dome shape, in part, with an open upper portion. The first inner shell 12 does not extend to the top or cranium portion of the helmet 10. In this respect the first inner shell 12 is shaped to provide additional protection to the front, back and sides of a person's head, which are the parts of the head that are most susceptible to injury in equestrian sports. On this basis, the first inner shell 12 assists in reinforcing a lower portion of the outer shell 11.
[041] The helmet 10 also comprises a second inner shell 13 that is formed from expanded polystyrene ('EPS'). The second inner shell 13 is shaped as an inner dome within the outer shell 11. The second inner shell 13 is formed over the first inner shell 12 such that the first inner shell 12 is an intermediate shell between the outer and second inner shells 11,13. The second inner shell 13 is also "in-moulded" to the outer shell 11 and also to the first inner shell
12. The outer shell 11, with the first inner shell 12 already moulded thereto, is placed in a mould and the second inner shell 13 is formed using techniques to mould expanded polystyrene objects known to a skilled person in the art. Because the second inner shell 13 is formed in this manner, it is bonded to the outer shell 11 and to the first inner shell 12.
[042] The second inner shell 13 can be formed with portions at different densities. A top or cranium portion 20 of the second inner shell 13 has a relatively lower density than front, back and side portions 21. By having the different density portions, the weight of the helmet 10 can be reduced by having a lower density in regions not requiring the same amount of strength and rigidity as other regions (ie. the front, back and sides of the helmet). The lower density regions have a density in the range of 35 - 60 g/L whereas the higher density regions have a density in the range of 45 - 70 g/L. It is also noted that the first inner shell 12 in this embodiment is located adjacent to the front, back and side portions 21 of the second inner shell 13 and does not extend up to the cranium portion 20.
[043] Referring now to Figures 2A and 2B, a helmet 110 according to another embodiment of the present invention is illustrated. The helmet 110 is similar to the helmet 10 of Figure 1. Similar features of the helmet 110 shown in Figures 2A and 2B are designated with the same reference number but prefixed with the numeral 1.
[044] The helmet 110 comprises an outer shell 111, a first inner shell 112 and a second inner shell 113. The first and second inner shells 112, 113 are in-moulded to the outer shell 111 as described above for the inner shells 12, 13 of the helmet 10 shown in Figure 1.
[045] The helmet 110 of Figures 2A and 2B also comprises a lower shell 130 that forms the lower part of the outer shell 111 structure of the helmet 110. The lower shell 130 is formed from a hard polymeric material such as polycarbonate. The lower shell 130 is connected to the base of the outer shell 111 and extends around the bottom lip 125 of the outer shell 111. The lower shell 130 is also located below the first inner shell 112. In cross- section, the lower shell 130 has a U-shape with opposed walls 131, 132 forming part of the inner and outer surfaces of the helmet 110 respectively. The outer wall 131 has an indentation 133 at its top, which is overlapped by the bottom lip 125 of the outer shell 111 so that the helmet 110 has a smooth finish.
[046] The lower shell 130 is "in-moulded" with respect to the outer shell 111 prior to the second inner shell 113 of expanded polystyrene is formed. Hence, the outer shell 111 is placed in a mould and the lower shell 130 moulded to the outer shell 111 so that they are bonded together. The polystyrene inner shell 113 is moulded to the outer shell, first inner shell 112 and lower shell 130 including by having a portion 134 that extends into the lower shell 130 between its opposed walls 131, 132. Advantageously, the construction of the helmets 10, 110 according to embodiments of the present invention produces, for example, a helmet that meets the high performance equestrian standard for helmets, ARB HS 2012. Thus, for equestrian sports, these helmets have superior impact performance across a range of impact levels (with double the impact attenuation of conventional equestrian helmets), high strength, crush resistance and puncture resistance.
[047] One advantage of the helmet 110 of Figures 2A and 2B over the helmet 10 of Figure 1 is that it is lighter (yet still meets the same standard). However, the helmet 10 of Figure 1 is harder and therefore longer wearing.
[048] In this specification, adjectives such as first and second, left and right, top and bottom, and the like may be used solely to distinguish one element or action from another element or action without necessarily requiring or implying any actual such relationship or order. Where the context permits, reference to an integer or a component or step (or the like) is not to be interpreted as being limited to only one of that integer, component, or step, but rather could be one or more of that integer, component, or step etc.
[049] The above description of various embodiments of the present invention is provided for purposes of description to one of ordinary skill in the related art. It is not intended to be exhaustive or to limit the invention to a single disclosed embodiment. As mentioned above, numerous alternatives and variations to the present invention will be apparent to those skilled in the art of the above teaching. Accordingly, while some alternative embodiments have been discussed specifically, other embodiments will be apparent or relatively easily developed by those of ordinary skill in the art. The invention is intended to embrace all alternatives, modifications, and variations of the present invention that have been discussed herein, and other embodiments that fall within the spirit and scope of the above described invention.
[050] In the claims which follow and in the preceding description of the invention, except where the context requires otherwise due to express language or necessary implication, the word "comprise" or variations such as "comprises" or "comprising" is used in an inclusive sense, i.e. to specify the presence of the stated features but not to preclude the presence or addition of further features in various embodiments of the invention.

Claims (1)

  1. Claims: 1. A helmet for equestrian sports comprising: an outer shell; and an inner shell moulded in the outer shell so that the inner shell is bonded to the outer shell.
    2. The helmet as claimed in claim 1, further comprising an intermediate shell located between the outer shell and the inner shell.
    3. The helmet as claimed in claim 2, wherein the intermediate shell is located in at least a side portion of the helmet.
    4. The helmet as claimed in claim 2 or 3, wherein the intermediate shell is formed as a annular band.
    5. The helmet as claimed in any one of claims 1 to 4, wherein the inner shell has non uniform density.
    6. The helmet as claimed in any one of claims 1 to 5, wherein the inner shell comprises a cranium portion that has a lower density and front, back and side portions of the inner shell have higher densities.
    7. The helmet according to claim 6, wherein the lower density portion has a density in the range of 35 - 60 g/L whereas the higher density portions have a density in the range of 45 - 70 g/L.
    8. The helmet as claimed in any one of claims 1 to 7, wherein the inner shell is formed from expanded polystyrene.
    9. The helmet as claimed in any one of claims 1 to 8, further comprising a lower shell attached to an edge of the outer shell.
    10. The helmet as claimed in claim 9, wherein the lower shell is U-shaped in cross section.
    11. The helmet as claimed in claim 10 or 119, wherein the lower shell defines opposed side walls and the inner shell has a portion located between the opposed side walls of the lower shell.
    12. A method of manufacturing a helmet for equestrian sports, the method comprising:
    a) forming an outer shell;
    b) placing the outer shell in a mould; and
    c) forming an inner shell in the mould.
    13. The method as claimed in claim 12, further comprising forming an intermediate shell in the mould prior to forming the inner shell, wherein the intermediate shell is located between the outer shell and the inner shell.
    14. The method as claimed in claim 13, wherein the intermediate shell is located in at least a side portion of the helmet.
    15. The method as claimed in claim 13 or 14, wherein the intermediate shell is formed as a annular band.
    16. The method as claimed in any one of claims 12 to 15, wherein the inner shell is formed with a non-uniform density.
    17. The method as claimed in any one of the claims 12 to 15, wherein step c) comprises forming the inner shell with a cranium portion that has a lower density and the front, back and side portions of the inner shell have a higher density.
    18. The method according to claim 17 wherein the lower density portion has a density in the range of 35 - 60 g/L whereas the higher density portions have a density in the range of 45 - 70 g/L.
    19. The method as claimed in any one of claims 12 to 18, wherein the inner shell is formed from expanded polystyrene.
    20. The method as claimed in any one of claims 12 to 19, further comprising forming a lower shell in the mould prior to forming the inner shell so that the lower shell is attached to an edge of the outer shell.
    21. The method as claimed in claim 20, wherein the lower shell is U-shaped in cross section.
    22. The method as claimed in claim 20 or 21, wherein the lower shell defines opposed side walls, whereby forming the inner shell in step c) comprises forming the inner shell between the opposed side walls of the lower shell.
    23. The method as claimed in any one of claim 12 to 22, wherein the outer shell is formed by injection moulding or vacuum moulding.
    125 130
    111 2024203052
    112 133
    Figure 2B 113
    132
    111
    Figure 2A
    113
AU2024203052A 2017-02-07 2024-05-08 A helmet and manufacture thereof Pending AU2024203052A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2024203052A AU2024203052A1 (en) 2017-02-07 2024-05-08 A helmet and manufacture thereof

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
AU2017900369A AU2017900369A0 (en) 2017-02-07 Manufacturing a Helmet
AU2017900369 2017-02-07
AU2018217432A AU2018217432B2 (en) 2017-02-07 2018-02-07 A helmet and manufacture thereof
PCT/AU2018/050088 WO2018145151A1 (en) 2017-02-07 2018-02-07 A helmet and manufacture thereof
AU2024203052A AU2024203052A1 (en) 2017-02-07 2024-05-08 A helmet and manufacture thereof

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
AU2018217432A Division AU2018217432B2 (en) 2017-02-07 2018-02-07 A helmet and manufacture thereof

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Publication Number Publication Date
AU2024203052A1 true AU2024203052A1 (en) 2024-05-23

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AU2018217432A Active AU2018217432B2 (en) 2017-02-07 2018-02-07 A helmet and manufacture thereof
AU2024203052A Pending AU2024203052A1 (en) 2017-02-07 2024-05-08 A helmet and manufacture thereof

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Application Number Title Priority Date Filing Date
AU2018217432A Active AU2018217432B2 (en) 2017-02-07 2018-02-07 A helmet and manufacture thereof

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AU (2) AU2018217432B2 (en)
GB (1) GB2572306B (en)
WO (1) WO2018145151A1 (en)

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US4075717A (en) * 1975-02-28 1978-02-28 Lemelson Jerome H Helmate
US9107466B2 (en) * 2009-08-31 2015-08-18 Rawlings Sporting Goods Company, Inc. Batting helmet having localized impact protection
US9814279B2 (en) * 2013-10-08 2017-11-14 Chang-Hsien Ho Integrally formed safety helmet structure
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AU2018217432B2 (en) 2024-02-08
AU2018217432A1 (en) 2019-08-01

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