US4864737A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shock absorbing device
Assignee: Individual
•
Filing: 1988-07-14
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Granted: 1989-09-12
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Expires: 2008-07-14
Abstract
Abstract A shock absorbing device comprising: an upper impermeable sheet; a lower impermeable sheet; an intermediate flexible impermeable sheet which is deformed to provide a grid of spaced peaks projecting on each surface thereof, the peaks being fixed to the upper and lower sheets to form two chambers of interconnected pockets, the upper one chamber being filled with a non-compressible liquid and the lower other chamber being filled with a compressible gas, the liquid and the gas being sealed therein.
Inventors
- 👤 Hugo Marrello
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:09
CPC Classifications
F; F16; F16F; F16F9/00; F16F9/02; F16F9/04; F16F9/049; A; A43; A43B; A43B13/00; A43B13/14; A43B13/18; A43B13/20; A43B17/00; A43B17/02; A43B17/026; F16F9/06; F16F9/08
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
79 words
A shock absorbing device comprising: (a) an upper impermeable sheet; (b) a lower impermeable sheet; (c) an intermediate flexible impermeable sheet which is deformed to provide a grid of spaced peaks projecting on each surface thereof, the peaks being fixed to the upper and lower sheets to form two chambers of interconnected pockets, one chamber being filled with a non-compressible liquid and the other chamber being filled with a compressible gas, the liquid and the gas being sealed therein.
Claim 2
Dependent Claim
79 words
A shock absorbing device comprising: (a) an upper impermeable sheet; (b) a lower impermeable sheet; (c) an intermediate flexible impermeable sheet which is deformed to provide a grid of spaced peaks projecting on each surface thereof, the peaks being fixed to the upper and lower sheets to form two chambers of interconnected pockets, one chamber being filled with a non-compressible liquid and the other chamber being filled with a compressible gas, the liquid and the gas being sealed therein.
Claim 3
Dependent Claim
23 words
A shock absorbing device as claimed in claim1 wherein the upper and the lower sheets are also made of a flexible, non-permeable material.
Claim 4
Dependent Claim
81 words
For use in a shoe, a sole comprising: (a) an upper impermeable sheet; (b) a lower impermeable sheet; (c) an intermediate sheet which is corrugated to form a grid of spaced peaks projecting from the upper surface thereof, the peaks being fixed to the upper and lower sheets to form two chambers of interconnected pockets, one chamber being filled with a non-compressible liquid and the other chamber being filled with a compressible gas, the liquid and the gas being sealed therein.
Claim 5
Dependent Claim
81 words
For use in a shoe, a sole comprising: (a) an upper impermeable sheet; (b) a lower impermeable sheet; (c) an intermediate sheet which is corrugated to form a grid of spaced peaks projecting from the upper surface thereof, the peaks being fixed to the upper and lower sheets to form two chambers of interconnected pockets, one chamber being filled with a non-compressible liquid and the other chamber being filled with a compressible gas, the liquid and the gas being sealed therein.
References Cited (Backward Citations)
GB792034A
Cited
US4115934A
Cited
US4100686A
Cited
WO1979000210A1
Cited
DE3333694A1
Cited
FR2591441A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-09-11 | 1993-03-13 | 1993-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-09-11 | 1997-03-13 | 1997-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-09-11 | 2001-03-13 | 2001-09-12 | $7700.00 | Window Closed / Lapsed |