Patent US3787893A successfully refreshed from Google Patents.
US3787893A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Protective headgear
Assignee: Individual
•
Filing: 1972-05-04
•
Granted: 1974-01-29
•
Expires: 1992-05-04
Abstract
Abstract Protective headgear including a hard shell and a plurality of inflated fluid chambers on the outside surface of said shell. Fluid delivery means is connected to each chamber and valve means in said chambers prevents reverse flow of fluid.
Inventors
- 👤 A Larcher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:28
CPC Classifications
A; A42; A42B; A42B3/00; A42B3/04; A42B3/10; A42B3/12; A42B3/121; A42B3/06; A42B3/062; A42B3/069; Y; Y10; Y10S; Y10S2/00; Y10S2/03
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
66 words
In a protective headgear assembly, a relatively rigid shell shaped to fit over a human head, spaced apart resilient cushions attached to and arranged over substantially the entire outer surface of said shell for protection against severe impact, said cushions comprising fluid filled chambers, a plurality of filling tubes interconnecting said chambers in groups and valve means provided between each chamber and its related filling tube.
Claim 2
Dependent Claim
66 words
In a protective headgear assembly, a relatively rigid shell shaped to fit over a human head, spaced apart resilient cushions attached to and arranged over substantially the entire outer surface of said shell for protection against severe impact, said cushions comprising fluid filled chambers, a plurality of filling tubes interconnecting said chambers in groups and valve means provided between each chamber and its related filling tube.
Claim 3
Dependent Claim
14 words
The assembly recited in claim 1, in which said valve means comprises check valves.
References Cited (Backward Citations)
US2296335A
Cited
US2618780A
Cited
US2664567A
Cited
US2594478A
Cited
US2759186A
Cited
US3009162A
Cited
FR1203481A
Cited
US3039109A
Cited
US3186004A
Cited
US3242500A
Cited
US3609764A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-28 | 1977-07-30 | 1978-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-28 | 1981-07-30 | 1982-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-28 | 1985-07-30 | 1986-01-29 | $7700.00 | Window Closed / Lapsed |