Patent US4432099A successfully refreshed from Google Patents.
US4432099A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Individually fitted helmet liner
Assignee: Gentex Corp
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Filing: 1982-07-09
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Granted: 1984-02-21
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Expires: 2002-07-09
Abstract
Abstract An individually fitted helmet liner includes a plurality of superposed contacting layers, each of which consists of a thermoplastic sheet formed with an array of pockets which are open and unfilled to allow their deformation in response to compressive contact with an adjacent layer. The liner is fitted to an individual wearer's head by heating the sheets to a plastic state, placing the liner between an outer shell and the wearer's head, and pressing down on the outer shell to deform the sheets to the proper extent.
Inventors
- 👤 Shelly J. Grick
- 👤 Joseph A. Beautz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:13
CPC Classifications
A; A42; A42C; A42C2/00; A42C2/007; A42B; A42B3/00; A42B3/04; A42B3/10; A42B3/12; A42B3/124; Y; Y10; Y10S; Y10S2/00; Y10S2/908; Y10S2/909
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
89 words
A helmet liner including in combination a plurality of layers conforming generally to the top of a wearer's head, said layers being assembled in superposed contacting relationship with one another and each comprising a sheet formed with generally spherical spaced pockets on at least one side thereof, said sheets being elastic at normal temperatures and plastically deformable at elevated temperatures to permit adjustment of the effective thickness of said liner, said pockets being open and unfilled to allow their deformation in response to compressive contact with an adjacent layer.
Claim 2
Dependent Claim
89 words
A helmet liner including in combination a plurality of layers conforming generally to the top of a wearer's head, said layers being assembled in superposed contacting relationship with one another and each comprising a sheet formed with generally spherical spaced pockets on at least one side thereof, said sheets being elastic at normal temperatures and plastically deformable at elevated temperatures to permit adjustment of the effective thickness of said liner, said pockets being open and unfilled to allow their deformation in response to compressive contact with an adjacent layer.
Claim 3
Dependent Claim
14 words
A helmet liner as in claim 1 in which said sheets comprise ethylene-vinyl acetate.
Claim 4
Dependent Claim
19 words
A helmet liner as in claim 1 in which said sheets comprise a copolymer of ethylene and methacrylic acid.
Claim 5
Dependent Claim
87 words
A helmet liner including in combination a plurality of layers conforming generally to the top of a wearer's head, said layers being assembled in superposed contacting relationship with one another and each comprising a sheet formed with spaced pockets on at least one side thereof, said sheets being elastic at normal temperatures and plastically deformable at elevated temperatures to permit adjustment of the effective thickness of said liner, said pockets being open and unfilled to allow their deformation in response to compressive contact with an adjacent layer.
Claim 6
Dependent Claim
87 words
A helmet liner including in combination a plurality of layers conforming generally to the top of a wearer's head, said layers being assembled in superposed contacting relationship with one another and each comprising a sheet formed with spaced pockets on at least one side thereof, said sheets being elastic at normal temperatures and plastically deformable at elevated temperatures to permit adjustment of the effective thickness of said liner, said pockets being open and unfilled to allow their deformation in response to compressive contact with an adjacent layer.
Claim 7
Dependent Claim
91 words
A helmet liner including in combination a plurality of layers conforming generally to the top of a wearer's head, said layers being assembled in superposed contacting relationship with one another and each comprising a sheet formed with spaced pockets on at least one side thereof, said sheets comprising ethylene-vinyl acetate and being elastic at normal temperatures and plastically deformable at elevated temperatures to permit adjustment of the effective thickness of said liner, said pockets being open and unfilled to allow their deformation in response to compressive contact with an adjacent layer.
Claim 8
Dependent Claim
91 words
A helmet liner including in combination a plurality of layers conforming generally to the top of a wearer's head, said layers being assembled in superposed contacting relationship with one another and each comprising a sheet formed with spaced pockets on at least one side thereof, said sheets comprising ethylene-vinyl acetate and being elastic at normal temperatures and plastically deformable at elevated temperatures to permit adjustment of the effective thickness of said liner, said pockets being open and unfilled to allow their deformation in response to compressive contact with an adjacent layer.
Claim 9
Dependent Claim
96 words
A helmet liner including in combination a plurality of layers conforming generally to the top of a wearer's head, said layers being assembled in superposed contacting relationship with one another and each comprising a sheet formed with spaced pockets on at least one side thereof, said sheets comprising a copolymer of ethylene and methacrylic acid and being elastic at normal temperatures and plastically deformable at elevated temperatures to permit adjustment of the effective thickness of said liner, said pockets being open and unfilled to allow their deformation in response to compressive contact with an adjacent layer.
Claim 10
Dependent Claim
96 words
A helmet liner including in combination a plurality of layers conforming generally to the top of a wearer's head, said layers being assembled in superposed contacting relationship with one another and each comprising a sheet formed with spaced pockets on at least one side thereof, said sheets comprising a copolymer of ethylene and methacrylic acid and being elastic at normal temperatures and plastically deformable at elevated temperatures to permit adjustment of the effective thickness of said liner, said pockets being open and unfilled to allow their deformation in response to compressive contact with an adjacent layer.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-02-20 | 1987-08-22 | 1988-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-02-20 | 1991-08-22 | 1992-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-02-20 | 1995-08-22 | 1996-02-21 | $7700.00 | Window Closed / Lapsed |