Patent US4926503A successfully refreshed from Google Patents.
US4926503A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Athletic shock absorbing pad
Assignee: Riddell Inc
•
Filing: 1989-06-30
•
Granted: 1990-05-22
•
Expires: 2009-06-30
Abstract
Abstract An athletic shock absorbing pad structure includes a flexible open-celled foam member disposed in a flexible enclosure and the flexible open-celled foam member comprises two layers of open-celled foam, the density of the layers of open-celled foam being different from one another.
Inventors
- 👤 James C. Wingo Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:05
CPC Classifications
A; A63; A63B; A63B71/00; A63B71/08; A63B71/12; A63B2071/1208
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
164 words
A shock absorbing pad structure for athletic equipment comprising: a flexible enclosure having first and second faces and a periphery defining a cavity; a flexible open-celled foam member is disposed within the cavity and comprises two layers of open-celled foam, the density of the layers of open-celled foam being different from one another, each layer of the foam member having two faces, one face of each layer being bonded to one face of the flexible enclosure, and each layer of open-celled foam having a periphery disposed adjacent the periphery of the flexible enclosure, the cells of the foam member releasably holding a volume of air selectively varied between first and second volumes differing by a volume differential in response to application and removal of a force on the shock absorbing pad structure, said volume differential being transferred between the foam member and the atmosphere outside the shock absorbing pad structure through at least one air permeable region of the periphery of the flexible enclosure.
Claim 2
Dependent Claim
164 words
A shock absorbing pad structure for athletic equipment comprising: a flexible enclosure having first and second faces and a periphery defining a cavity; a flexible open-celled foam member is disposed within the cavity and comprises two layers of open-celled foam, the density of the layers of open-celled foam being different from one another, each layer of the foam member having two faces, one face of each layer being bonded to one face of the flexible enclosure, and each layer of open-celled foam having a periphery disposed adjacent the periphery of the flexible enclosure, the cells of the foam member releasably holding a volume of air selectively varied between first and second volumes differing by a volume differential in response to application and removal of a force on the shock absorbing pad structure, said volume differential being transferred between the foam member and the atmosphere outside the shock absorbing pad structure through at least one air permeable region of the periphery of the flexible enclosure.
Claim 3
Dependent Claim
49 words
The shock absorbing pad structure of claim 1 wherein the flexible enclosure comprises a nylon fabric having a polyurethane coating on one face, the flexible open-celled foam member comprises polyurethane foam, and the coated face of the fabric is heat sealed at least in part to the polyurethane foam.
Claim 4
Dependent Claim
56 words
The shock absorbing pad structure of claim 2 wherein one of the foam layers comprises a foam having a density in the range of approximately 2.0 to 2.8 pounds per cubic foot; and the other layer of foam comprises a foam having a density in the range of approximately 2.8 to 3.5 pounds per cubic foot.
Claim 5
Dependent Claim
16 words
The shock absorbing pad structure of claim 2 wherein the foam layers have different compression ratings.
References Cited (Backward Citations)
US2917843A
Cited
DE1133622B
Cited
US3044075A
Cited
US3047888A
Cited
US3553749A
Cited
US3534417A
Cited
DE2125514A1
Cited
US4100620A
Cited
GB1572159A
Cited
US4128902A
Cited
WO1981002384A1
Cited
NL8004755A
Cited
EP0070701A1
Cited
US4486901A
Cited
US4451996A
Cited
US4451996B1
Cited
US4700403A
Cited
US4723322A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-05-21 | 1993-11-20 | 1994-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-05-21 | 1997-11-20 | 1998-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-05-21 | 2001-11-20 | 2002-05-22 | $7700.00 | Window Closed / Lapsed |