Patent US3680912A successfully refreshed from Google Patents.
US3680912A
Expired / Lapsed
US
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Head-rest of the shock absorbing system
Assignee: Individual
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Filing: 1970-09-14
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Granted: 1972-08-01
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Expires: 1990-09-14
Abstract
Abstract A head-rest of the shock absorbing system to be fixed to the seat of a vehicle, such as an automobile and the like, a tubular hollow member formed with elastic material, such as rubber, soft synthetic resin and the like, being maintained inside the headrest, the inside of said tubular hollow member being filled with fluid, such as liquid, gas and the like, it being so arranged that, only when a shock is applied to the head-rest, the fluid inside the tubular hollow member will flow into an absorbing hollow member communicating with said tubular hollow member through a resistance tube or a check valve.
Inventors
- 👤 Hirotsugu Matsuura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:45
CPC Classifications
B; B60; B60N; B60N2/00; B60N2/80; B60N2/806; B60N2/838; B60R; B60R21/00; B60R21/02; B60R21/04; B60R2021/0407; Y; Y10; Y10S; Y10S297/00; Y10S297/03
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
A head-rest comprising in combination: a. an outer cover (11) with an inner wall defining a hollow space therein; b. a resilient tubular hollow first member (12) along one side of said inner wall with a fluid (13) therein; c. a resilient hollow absorbing second member (16) within said hollow space; d. a resistance valve connection (31) between said first and second members including first and second tube-like parts (32, 33), a constriction (34) between said parts with grooves (35) therein limiting fluid flow between said members; and, e. fixing rods (25) for connection of said head-rest to a vehicle component, whereby, when subjected to a shock, said shock is absorbed by said constricted fluid flow across said resistance connection.
Claim 2
Dependent Claim
120 words
A head-rest comprising in combination: a. an outer cover (11) with an inner wall defining a hollow space therein; b. a resilient tubular hollow first member (12) along one side of said inner wall with a fluid (13) therein; c. a resilient hollow absorbing second member (16) within said hollow space; d. a resistance valve connection (31) between said first and second members including first and second tube-like parts (32, 33), a constriction (34) between said parts with grooves (35) therein limiting fluid flow between said members; and, e. fixing rods (25) for connection of said head-rest to a vehicle component, whereby, when subjected to a shock, said shock is absorbed by said constricted fluid flow across said resistance connection.
References Cited (Backward Citations)
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US3018492A
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US3017221A
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US3374981A
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US3510150A
Cited
US3403938A
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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) | 1975-08-01 | 1976-01-31 | 1976-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-01 | 1980-01-31 | 1980-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-01 | 1984-01-31 | 1984-08-01 | $7700.00 | Window Closed / Lapsed |