US20170172242A1 - Helmet - Google Patents

Helmet Download PDF

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Publication number
US20170172242A1
US20170172242A1 US15/312,271 US201515312271A US2017172242A1 US 20170172242 A1 US20170172242 A1 US 20170172242A1 US 201515312271 A US201515312271 A US 201515312271A US 2017172242 A1 US2017172242 A1 US 2017172242A1
Authority
US
United States
Prior art keywords
liner
deflectors
impact absorbing
helmet according
border
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.)
Abandoned
Application number
US15/312,271
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English (en)
Inventor
Christopher James LEATT
Pieter André KEEVY
Jörn Peter STEFFENS
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.)
Leatt Corp
Original Assignee
Leatt Corp
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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=51135227&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=US20170172242(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Leatt Corp filed Critical Leatt Corp
Publication of US20170172242A1 publication Critical patent/US20170172242A1/en
Assigned to LEATT CORPORATION reassignment LEATT CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KEEVY, Pieter André, STEFFENS, Jörn Peter
Abandoned legal-status Critical Current

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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
    • A42B3/06—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
    • A42B3/064—Impact-absorbing shells, e.g. of crash helmets with reinforcing means using layered structures with relative movement between layers
    • 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
    • A42B3/127—Cushioning devices with a padded structure, e.g. foam with removable or adjustable pads

Definitions

  • This invention relates to protective helmets intended to protect the head against linear and rotational impacts.
  • Most protective helmets comprise a durable, hard outer shell that can receive impacts and an energy absorbing liner that is intended to dissipate energy from an impact received on the outer shell, before transferring it to the wearer's head.
  • These conventional helmets provide reasonably good protection against impacts that could result in linear cranial acceleration, but impacts that are poorly aligned with the centre of gravity of the wearer's head (that often impact the helmet at an oblique angle) can still result in substantial rotational cranial acceleration and consequential brain injury and concussion.
  • the impacts may be severe or they may be moderate and repetitive and the injuries resulting from repetitive brain injury often go unnoticed initially, until their cumulative effect is severe.
  • conventional helmets provide reasonably good protection against severe linear impacts, they are typically not designed to protect the head against moderate (e.g. low speed) impacts, which could cause brain injury from a single instance or through repetition.
  • Helmets that are intended to protect a wearer against linear and rotational cranial acceleration have been proposed in US 2012/0198604, including a relatively hard outer shell, an outer liner inside the outer shell and an inner liner, spaced inside the outer liner, with various resilient elastomeric isolation dampers extending between the inner and outer liners, to absorb omnidirectional loads between the two liners.
  • the present invention seeks to provide an improved helmet which protects a wearer's head against linear and rotational impacts, including improved protection against linear, low speed impacts.
  • a helmet comprising:
  • the term “connected” is intended to include any arrangement in which the impact absorbing liner can receive loads from the outer shell and it is not limited to contact, attachment, linkage, or any other limitation.
  • aperture is intended to include any form of recess in the inner liner, in which a deflector is receivable, at least in part.
  • One or more (preferably all) of the receiving formations may be apertures defined in the inner liner and one or more (preferably all) of the deflectors may be connectable to the apertures by fitting inside the apertures
  • the deformable elements may include a plurality of deformable spokes extending between the body and the border and at least some of the spokes may be curved and/or may extend in a spiral configuration between the body and the border.
  • At least some of the deflectors may be of a non-Newtonian material preferably a shear thickening or dilatant material.
  • At least some of the deflectors may define a shell extending between the impact absorbing liner and the inner liner and the shell may be at least partly collapsible and may extend at least partly around a cavity defined in the deflector.
  • the bodies of at least some of the deflectors may be releasably connectable to the impact absorbing liner and/or may be connectable to the impact absorbing liner by way of anchor formations that extend, at least in part, into the impact absorbing liner.
  • FIG. 1 is an inside view of a deflector according to the present invention
  • FIG. 2 is a sectional side view of the deflector of FIG. 1 , taken at II-II;
  • FIG. 3 is an outside view of the deflector of FIG. 1 ;
  • FIG. 4 is a detail sectional view through part of an impact absorbing liner, part of an inner liner, and the deflector of FIG. 1 ;
  • FIG. 5 shows diagrammatic sectional and outside views of part of an impact absorbing liner and a deflector according to the present invention, before impact and while receiving tangential impact loads from opposing directions;
  • FIG. 6 shows a bottom view of an impact absorbing liner and deflectors according to the present invention, including deflectors hidden by part of the impact absorbing liner;
  • FIG. 7 shows a front view of the impact absorbing liner and deflectors of FIG. 6 , including deflectors hidden by part of the impact absorbing liner;
  • FIG. 8 shows a side view of the impact absorbing liner of FIG. 6 , with deflectors of the lower ring;
  • FIG. 9 shows an exploded sectional side view of a kit for installing a deflector on an impact absorbing liner according to the present invention.
  • FIG. 10 shows a sectional view of the deflector of FIG. 9 installed on the impact absorbing liner
  • FIG. 11 shows a profile view of a mounting washer of the kit of FIG. 9 .
  • a helmet according to the present invention includes: an outer shell of tough, durable material (not shown); an impact absorbing liner generally designated by reference number 10 ; an inner liner, which in the illustrated example it is a comfort liner, generally designated by reference number 12 ; and a plurality of deflectors, generally designated by reference number 14 , with suffixes to distinguish between different deflectors, where relevant. It is possible for the helmet to have any number of deflectors 14 —even only one, but preferably, the helmet includes a plurality of spaced deflectors.
  • the impact absorbing liner 10 can be of any suitable material that can absorb impact energy, such as expanded polystyrene (EPS) and it extends directly inside the outer shell.
  • EPS expanded polystyrene
  • the impact absorbing liner 10 can be attached to the outer shell (e.g. with releasable attachment), it can be held in place by complementary geometries of these components, or it can be held in place inside the outer shell in any other way, but it is preferably attached to the inside of the outer shell by being moulded inside the outer shell.
  • the outer shell and impact absorbing liner 10 are configured so that the energy from impacts received on the outer shell are dissipated in part, in the impact absorbing liner, before the impact is transferred to the head of a wearer of the helmet—much as in conventional helmets.
  • the comfort liner 12 extends along the inside of the impact absorbing liner 10 , preferably in direct contact, but is not attached to the impact absorbing layer and can slide relative to it.
  • the inner liner can be of any material, but the comfort liner 12 is of soft compressible material, such as soft foam that is soft enough to fit comfortably on the wearer's head.
  • relative sliding motion between the impact absorbing liner 10 and comfort liner 12 is improved by choice of materials, slip washers provided between these components, or the like.
  • the comfort liner 12 includes one or more receiving formations for connecting to the deflectors and in the illustrated embodiment, the receiving formations are in the form of apertures 16 that are defined in the comfort liner 12 and in the preferred embodiment, each of the apertures has a circular profile and extends through the comfort liner, with a diameter similar to the outer diameter of a deflector 14 .
  • the apertures defined in the inner liners can be in the form of recesses that do not extend through the comfort liner, or the comfort liner could include other forms of receiving formations such as protuberances, grip formations, adhesive or gripping material, or the like.
  • each deflector 14 is generally disc shaped and is a unitary injection moulding of a non-Newtonian, shear thickening (dilatant) material.
  • Each deflector 14 has a central body in the form of a hub 20 and a border 18 extending around its circumference, with a number of deformable elements in the form of curved spokes 22 extending between the hub and border in a spiral configuration.
  • each of the spokes 22 has an elongated cross-sectional profile and can flex with relative ease if the hub 20 moves relative to the border 18 .
  • other embodiments of the invention can include differently configured deformable elements instead or, or in addition to the spokes 22 , which also extend flexibly between the body and the border.
  • a central passage 24 is defined in the hub 20 , through which an anchor formation in the form of a pin 26 can pass.
  • the hub 20 and border 18 are each of a hollow design, comprising partly collapsible shells 19 , 21 around open internal cavities 28 , which allow the hub and border to be compressed, when the shells collapse to any degree.
  • the spokes 22 also flex or twist, so that the whole deflector 14 is compressible.
  • the shear-thickening properties of the material from which the deflector 14 is made allows it to be compressed with relative ease when not exposed to impacts (e.g. during normal use of the helmet), but if it receives a compression impact, e.g. from a linear impact exerted on the outer shell of the helmet, the deflector offers more resistance to compression.
  • the hollow (U-shaped) profile of the shells 19 , 21 of the hub 20 and border 18 allows these features to collapse under pressure and expand sideways, which allows the spokes 22 more freedom to stretch and allow movement between the hub and border.
  • each deflector 14 is attached to the impact absorbing liner 10 by the pin 26 that is received in a recess inside the impact absorbing liner.
  • the recess in the impact absorbing liner 10 is lined with a basket 30 in which the end of the pin 26 is receivable in a clipping manner—holding the deflector firmly 14 in place, but allowing it to be removed and/or replaced, if necessary.
  • an attachment formation similar to the pin 26 may be integrally formed with the deflector 14 or the deflector may be attached to the impact absorbing liner 10 by other means, such as partially embedding it in the impact absorbing liner during moulding (of the impact absorbing liner).
  • the border 18 of the deflector 14 fits snugly inside the circumference of the aperture 16 and in the illustrated embodiment has a thickness that is substantially less than the thickness of the comfort liner 12 .
  • the deflector 14 has a thickness of about 5 mm and a diameter of about 26 mm.
  • the comfort liner 12 and deflectors 14 are possible in other embodiments of the invention.
  • the comfort liner 12 could define open apertures in which the deflectors 14 are received (as in the illustrated embodiment), with the deflectors exposed, the deflectors could be flush or protrude on the inside of the comfort liner (if this does not create discomfort), or the comfort liner could receive the deflectors in blind recesses and cover the deflectors on the inside of the helmet.
  • the deflectors 14 could connect the comfort liner 12 with the impact absorbing liner 10 ; the deflectors could replace the comfort liner; the deflectors could be integrated (e.g. injected) into the comfort liner; or the deflectors could be in-layered (during the in-moulding process) in the impact absorbing liner.
  • FIG. 5 sectional and outside views of two deflectors are shown, numbered as 14 . 1 , 14 . 2 and 14 . 3 , each anchored in the impact absorbing liner 10 and received in the comfort liner 12 .
  • the deflector 14 . 1 on the left in each view has not been subjected to any force and is in its original shape, but the deflectors 14 . 2 and 14 . 3 in the centre and on the right in each view, have been subjected to forces 32 in tangential directions.
  • the tangential forces 32 caused the borders 18 . 2 and 18 . 3 of the deflectors 14 . 2 and 14 . 3 to be displaced relative to their hubs 20 . 2 and 20 . 3 and caused their spokes 22 . 2 and 22 . 3 to be deflected by the relative displacement of the borders.
  • the deflection of the spokes 22 and the relative displacement of the border 18 relative to the hub 20 results partly from the geometry of the deflector 14 (particularly the spokes) and partly from the resilient deformability of the non-Newtonian material of the deflector 14 . 2 .
  • the positions of the deflectors 14 relative to the impact absorbing layer 10 are shown and include three deflectors in an upper ring and six deflectors in a lower ring, disposed on an imaginary profile resembling the profile of a human head.
  • the deflectors 14 in the upper ring include two front deflectors 14 a and a rear deflector 14 b .
  • the deflectors in the lower ring includes a rear deflector 14 c , of a lower ring of deflectors, with the deflector 14 c disposed about midway between the deflector 14 b and the base 34 of the impact absorbing liner 10 .
  • the other deflectors in the lower ring include a front deflector 14 d and two lateral deflectors 14 e on each side of the helmet.
  • the positioning of the deflectors 14 is intended to provide an even distribution of rotational/tangential forces transferred between the impact absorbing liner 10 and comfort liner 12 by the deflectors 14 , as will be described below.
  • this distribution of the deflectors 14 is only one example and in other embodiments of the invention, more or fewer deflectors can be used and they can be distributed in various other configurations.
  • the invention extends to a kit that can be used to modify a helmet by fitting deflectors 14 to the impact absorbing liner 10 of the helmet. (Rigorous safety standards are applied to the design and manufacture of helmets in most countries and modification of helmets is not necessarily advisable or permitted, so care needs to be taken when considering modification of a helmet.)
  • the kit includes one or more deflectors 14 as described above, a rough washer 36 , an adhesive layer 38 for attaching the washer to the inside of the impact absorbing liner 10 and a pin 26 for securing the deflector.
  • the adhesive layer 38 is typically applied to the washer 36 (even though they are shown separately in FIG. 9 ) and the washer is attached to the impact absorbing liner 10 in a preferred position.
  • the washer 36 preferably includes radial grooves 40 that allow it to be shaped to fit on a concave surface.
  • the deflector 14 is fitted by passing the pin 26 through the central passage 24 of the deflector and clipping an end of the pin into an aperture 42 defined in the washer 36 .
  • the border 18 and hub 20 of the deflector 14 shown in FIGS. 9 and 10 have different profiles from those shown in preceding figures, but they still each define a collapsible shell 19 , 21 and cavity 28 so that they are compressible, as described above.
  • the present invention also protects the wearer against moderate impacts, with impact absorption in the deflectors that varies with the severity of the impact, due to the non-Newtonian properties of the material from which the deflectors 14 are made.
  • rotational impacts are received on the outer shell of the helmet, i.e. impacts that are not aligned with the centre of gravity of the wearer's head and helmet, and that thus result in rotational forces, the rotational forces are transferred as tangential forces 32 from the impact absorbing liner 10 to the comfort liner, via the deflectors 14 .
  • the resilience of the spokes 22 when they deflect, causes some of the impact of the rotational/tangential force 32 to be dissipated before it is transferred from the impact absorbing layer 10 to the comfort liner 12 and accordingly, the rotational impact is reduced before it is transferred to the wearer's head.
  • the deflection of the spokes 22 is also reversible in the case of moderate impacts and accordingly, the deflectors 14 can protect the wearer's head against repeated moderate rotational impacts.
  • the invention has been described with reference to the impact absorbing liner 10 and comfort liner 12 , but the liner 10 need not form the only impact absorbing layer and can be a liner inside another impact absorbing liner and likewise, the liner 12 need not be the only comfort liner and can have an additional liner on its inside.
  • the liners 10 and/or 12 can thus replace the impact absorbing liner and comfort liner of conventional helmet construction, wholly or in part.

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  • Helmets And Other Head Coverings (AREA)
US15/312,271 2014-05-21 2015-05-21 Helmet Abandoned US20170172242A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB1409041.9 2014-05-21
GBGB1409041.9A GB201409041D0 (en) 2014-05-21 2014-05-21 Helmet
PCT/IB2015/053735 WO2015177747A1 (en) 2014-05-21 2015-05-21 Helmet

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2015/053735 A-371-Of-International WO2015177747A1 (en) 2014-05-21 2015-05-21 Helmet

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US16/460,606 Continuation US11197511B2 (en) 2014-05-21 2019-07-02 Helmet

Publications (1)

Publication Number Publication Date
US20170172242A1 true US20170172242A1 (en) 2017-06-22

Family

ID=51135227

Family Applications (4)

Application Number Title Priority Date Filing Date
US15/312,271 Abandoned US20170172242A1 (en) 2014-05-21 2015-05-21 Helmet
US16/460,606 Active 2035-09-12 US11197511B2 (en) 2014-05-21 2019-07-02 Helmet
US17/475,561 Active US11758963B2 (en) 2014-05-21 2021-09-15 Helmet
US18/461,860 Pending US20230404199A1 (en) 2014-05-21 2023-09-06 Helmet

Family Applications After (3)

Application Number Title Priority Date Filing Date
US16/460,606 Active 2035-09-12 US11197511B2 (en) 2014-05-21 2019-07-02 Helmet
US17/475,561 Active US11758963B2 (en) 2014-05-21 2021-09-15 Helmet
US18/461,860 Pending US20230404199A1 (en) 2014-05-21 2023-09-06 Helmet

Country Status (10)

Country Link
US (4) US20170172242A1 (zh)
EP (2) EP3145354B1 (zh)
CN (1) CN106455738A (zh)
AU (1) AU2015262893B2 (zh)
BR (1) BR112016026982A8 (zh)
CA (1) CA2949756A1 (zh)
ES (1) ES2672930T3 (zh)
GB (1) GB201409041D0 (zh)
PT (1) PT3145354T (zh)
WO (1) WO2015177747A1 (zh)

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WO2020058446A1 (en) * 2018-09-20 2020-03-26 Mips Ab Helmet
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US11304470B2 (en) * 2018-06-18 2022-04-19 Bell Sports, Inc. Cycling helmet with rotational impact attenuation
CN114403539A (zh) * 2022-02-28 2022-04-29 巢湖学院 折叠式安全防护头盔
US20220330648A1 (en) * 2019-07-03 2022-10-20 Sport Maska Inc. Sport helmet
US20220361618A1 (en) * 2021-05-12 2022-11-17 Martin Ehret Impact-related acceleration reduction helmet
US20230023020A1 (en) * 2019-12-18 2023-01-26 Mips Ab Connector
IT202100021623A1 (it) * 2021-08-10 2023-02-10 Univ Bologna Alma Mater Studiorum Dispositivo per ammortizzare urti sui caschi e relativo casco
US11766083B2 (en) 2019-03-25 2023-09-26 Tianqi Technology Co (Ningbo) Ltd Helmet
US11930875B2 (en) 2021-07-12 2024-03-19 John Hooman Kasraei Impact reduction system for personal protective devices

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US11805826B2 (en) * 2012-02-16 2023-11-07 WB Development Company, LLC Personal impact protection device
GB201409041D0 (en) * 2014-05-21 2014-07-02 Leatt Corp Helmet
CN107847003B (zh) * 2016-03-17 2020-11-27 米帕斯公司 头盔、用于头盔的内衬、用于头盔的舒适衬垫以及连接件
CN106974351A (zh) * 2017-04-05 2017-07-25 江门市鹏程头盔有限公司 一种配装有卸载型帽檐的摩托车头盔
EP3391765B1 (en) * 2017-04-18 2020-03-25 Ku, Cheng-Huei Safety helmet with rotary impact buffering function
GB2568019B (en) 2017-08-29 2022-02-16 Rheon Labs Ltd Anisotropic Absorbing Systems
GB201800255D0 (en) * 2018-01-08 2018-02-21 Mips Ab Helmet
GB201802898D0 (en) 2018-02-22 2018-04-11 Mips Ab Connector
TWI680727B (zh) * 2018-06-12 2020-01-01 豐閣行銷設計有限公司 可吸收多向衝擊之安全帽
GB2597534A (en) * 2020-07-28 2022-02-02 Strategic Sports Ltd Improvements in or relating to helmets
CA3234991A1 (en) * 2021-09-29 2023-04-06 Daniel ABRAM A novel protective helmet
US12102158B2 (en) 2022-06-09 2024-10-01 Tianqi Technology Co (Ningbo) Ltd Helmet coupler and helmet with helmet coupler

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IT202100021623A1 (it) * 2021-08-10 2023-02-10 Univ Bologna Alma Mater Studiorum Dispositivo per ammortizzare urti sui caschi e relativo casco
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US20190343212A1 (en) 2019-11-14
CN106455738A (zh) 2017-02-22
WO2015177747A1 (en) 2015-11-26
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US20210401102A1 (en) 2021-12-30
US20230404199A1 (en) 2023-12-21
PT3145354T (pt) 2018-05-29
EP3145354B1 (en) 2018-03-07
EP3357363A1 (en) 2018-08-08
US11758963B2 (en) 2023-09-19
AU2015262893A1 (en) 2017-01-19
ES2672930T3 (es) 2018-06-18
EP3145354A1 (en) 2017-03-29
US11197511B2 (en) 2021-12-14
BR112016026982A8 (pt) 2020-03-31
CA2949756A1 (en) 2015-11-26
AU2015262893B2 (en) 2020-06-11

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