US4375108A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Energy-absorbing insert for protective headgear
Assignee: MICHIGAN A CONSTITUTIONAL CORP OF MI, University of, Regents of
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Filing: 1981-01-28
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Granted: 1983-03-01
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Expires: 2001-01-28
Abstract
Abstract An ancillary multichambered fluid-filled cushion for use as an energy-absorbing insert on the inside of protective headgear of the type having an outer helmet shell and a flexible inner liner. The chambers may be distinct or may be interconnected by means of communicating passages which control the flow of fluid between chambers. The chamber and communicating passages are formed of resilient material bonded together at perimeter flanges which may be engageable with the helmet inner liner so as to hold the cushion in place. The cushion is aligned intermediate the wearer's head and the outer shell, between existing inner liner components, so as to provide partial support of the helmet shell.
Inventors
- 👤 Elwyn R. Gooding
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:54
CPC Classifications
A; A42; A42B; A42B3/00; A42B3/04; A42B3/10; A42B3/12; A42B3/121; Y; Y10; Y10S; Y10S2/00; Y10S2/908; Y10S2/909
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
173 words
An energy-absorbing cushion for use in protective headgear of the type having an outer helmet shell adapted to be supported over a wearer's head by a flexible inner liner, said cushion comprising a plurality of resilient wall members secured together so as to form a plurality of fluid-filled chambers having walls of resilient material confining the fluid within said chambers, said cushion being mountable on the inside of said helmet shell so as to contact the wearer's head and provide at least partial support for said helmet shell, said fluid-filled chambers being formed in pairs positionable concentrically about the wearer's head with one of said wall members forming a common wall of said resilient material dividing said pairs of chambers, each of said pairs including an inner fluid-filled chamber for contacting the wearer's head and an outer fluid-filled chamber to be positioned adjacent the outer helmet shell, each of said inner and outer fluid chambers being positioned side-by-side with a similar chamber and being in fluid communication therewith through a fluid carrying passage.
Claim 2
Dependent Claim
173 words
An energy-absorbing cushion for use in protective headgear of the type having an outer helmet shell adapted to be supported over a wearer's head by a flexible inner liner, said cushion comprising a plurality of resilient wall members secured together so as to form a plurality of fluid-filled chambers having walls of resilient material confining the fluid within said chambers, said cushion being mountable on the inside of said helmet shell so as to contact the wearer's head and provide at least partial support for said helmet shell, said fluid-filled chambers being formed in pairs positionable concentrically about the wearer's head with one of said wall members forming a common wall of said resilient material dividing said pairs of chambers, each of said pairs including an inner fluid-filled chamber for contacting the wearer's head and an outer fluid-filled chamber to be positioned adjacent the outer helmet shell, each of said inner and outer fluid chambers being positioned side-by-side with a similar chamber and being in fluid communication therewith through a fluid carrying passage.
Claim 3
Dependent Claim
33 words
An energy-absorbing cushion as defined in claim 1 wherein said fluid carrying passages are formed by positioning said common wall in a closely spaced relation with the other ones of said wall members.
Claim 4
Dependent Claim
63 words
An energy-absorbing protective cushion as defined in claim 2 wherein said wall members are formed of resilient material bonded together along the perimeters of said wall members with said common wall member between the other ones of said wall members located on opposite sides of said common wall member and being formed with facing sections of concave configuration which form a two-chambered cushion.
Claim 5
Dependent Claim
34 words
An energy-absorbing protective cushion as defined in claim 3 wherein said bonding along said perimeter forms an external flange located in substantial alignment with said wall member which divides said inner and outer chambers.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-02-28 | 1986-08-30 | 1987-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-02-28 | 1990-08-30 | 1991-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-02-28 | 1994-08-30 | 1995-03-01 | $7700.00 | Window Closed / Lapsed |