Patent US3799531A successfully refreshed from Google Patents.
US3799531A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Buffering device
Assignee: Bridgestone Corp
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Filing: 1972-07-18
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Granted: 1974-03-26
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Expires: 1992-07-18
Abstract
Abstract A buffering device comprising a resilient buffer member, a resilient friction member abutting the buffer member at one end thereof, the resilient friction member being expansible in a direction perpendicular to compressive forces applied in use thereto. The restrictor restricting expansion of the friction member and an impact-receiving member is adapted, to receive an external impact load and to transmit the impact load to the resilient member through the friction member while causing the friction member to move against friction between the friction member and the restrictor.
Inventors
- 👤 H Yamazaki
- 👤 K Nakamura
- 👤 Y Kondo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:24
CPC Classifications
F; F16; F16F; F16F7/00; F16F7/08; F16F7/09; B; B60; B60R; B60R19/00; B60R19/02; B60R19/24; B60R19/26
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
227 words
A buffering device comprising a support member; a hollow elongated resilient buffer member having one longitudinal end fixed to said support member; a hollow elongated resilient friction member having one longitudinal end adjacent the opposite longitudinal end of said buffer member, the hollow space of said friction member being linearly aligned with the hollow space of said resilient buffer member; a restrictor comprising a casing which surrounds the outer surfaces of said buffer member and said friction member, and a core member slidably extending through at least the hollow space of said friction member, said restrictor being in contact with the outer periphery of said friction member so as to restrict expansion of said friction member in directions perpendicular to the direction of elongation thereof when said friction member is compressed in said direction of elongation, one of the casing and the core member being secured to said support member; and an impact-receiving member having a part engaging the opposite longitudinal end of said friction member, said impactreceiving member being secured to that one of said casing and said core member which is not connected to said support member, so thAt, upon impact, said friction member is expanded in said perpendicular directions until said friction member engages both said core member and said casing so as to move against friction between the friction member and said restrictor.
Claim 2
Dependent Claim
227 words
A buffering device comprising a support member; a hollow elongated resilient buffer member having one longitudinal end fixed to said support member; a hollow elongated resilient friction member having one longitudinal end adjacent the opposite longitudinal end of said buffer member, the hollow space of said friction member being linearly aligned with the hollow space of said resilient buffer member; a restrictor comprising a casing which surrounds the outer surfaces of said buffer member and said friction member, and a core member slidably extending through at least the hollow space of said friction member, said restrictor being in contact with the outer periphery of said friction member so as to restrict expansion of said friction member in directions perpendicular to the direction of elongation thereof when said friction member is compressed in said direction of elongation, one of the casing and the core member being secured to said support member; and an impact-receiving member having a part engaging the opposite longitudinal end of said friction member, said impactreceiving member being secured to that one of said casing and said core member which is not connected to said support member, so thAt, upon impact, said friction member is expanded in said perpendicular directions until said friction member engages both said core member and said casing so as to move against friction between the friction member and said restrictor.
Claim 3
Dependent Claim
63 words
A buffering device according to claim 1, wherein said friction member comprises a pair of parallel rubber plates, and said resilient buffer member comprises another pair of rubber plates which are respectively aligned with and connected to said rubber plates of the friction member, with the rubber plates of the friction member being more resiliently deformable than those of said resilient buffer member.
Claim 4
Dependent Claim
39 words
A buffering device according to claim 1, wherein said friction member comprises a hollow rubber tube through which the core member extends, and said resilient buffer member comprises a coil spring supporting said rubber tube at one end thereof.
Claim 5
Dependent Claim
32 words
A buffering device according to claim 1, wherein said friction member is a hollow rubber tube through which the core member extends, and the resilient buffer member is a shear-type rubber cylinder.
Claim 6
Dependent Claim
21 words
A buffering device according to claim 4, including a ring adapted to bias said resilient buffer member towards said friction member.
Claim 7
Dependent Claim
43 words
A buffering device according to claim 1, wherein said friction member is a hollow rubber tube through which said core member extends, and said resilient buffer member comprises a plurality of disc-shaped springs in alignment with the longitudinal axis of the core member.
Claim 8
Dependent Claim
23 words
A buffering device according to claim 6, wherein said core member extends into said tube casing and through said plurality of disc-shaped springs.
Claim 9
Dependent Claim
22 words
A buffering device according to claim 7, wherein said tube casing has a guide bore adapted to slidably receive said core member.
Claim 10
Dependent Claim
46 words
A buffering device according to claim 8, including a guide stud which carries said buffer member and said core member in alignment with the longitudinal axis thereof, with said casing being adapted to be slidably received over said stud for guiding the movement of the casing.
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) | 1977-03-25 | 1977-09-24 | 1978-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-25 | 1981-09-24 | 1982-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-25 | 1985-09-24 | 1986-03-26 | $7700.00 | Window Closed / Lapsed |