Patent US3944254A successfully refreshed from Google Patents.
US3944254A
Expired / Lapsed
US
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Shock-absorbing device
Assignee: Individual
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Filing: 1974-10-25
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Granted: 1976-03-16
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Expires: 1994-10-25
Abstract
Abstract A shock-absorbing device for a bicycle and the like. This device comprises a front fork divided in two shafts that connect at the upper terminal thereof to the handle shaft via a fitting unit and at their lower terminal sustain the front wheel of said vehicle, said front fork being swingable back and forth centering around the foregoing upper juncture. Said front fork is intermediately sandwiched by a pair of springs in the state that the springs press the fork in opposite directions so as to absorb either horizontal or vertical shocks thereby providing safety to the rider to some extent at the time of collision and the like or comfort when riding on a bumpy road.
Inventors
- 👤 Takao Inui
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:12
CPC Classifications
B; B62; B62K; B62K25/00; B62K25/04; B62K25/12; B62K25/22; B62K25/24
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
130 words
A shock absorbing arrangement for a bicycle comprising in combination: a. a head arbor (11) for holding a vertical handle shaft (13) having a lower enlarged portion (15) and an upper fitting unit (17); b. a front fork (16) including a pair of pipes (23) for a front wheel (24) and fastening pieces (21) for fastening said front fork (16) to said fitting unit (17); and, c. a spring holder (26) held between said pipes (23) having an aperture (27) and a spring supporting shaft (28) passing through said aperture (27), said spring supporting shaft (28) having an inner base (33) and an outer retaining nut (32) with spring means (34, 35) held on said spring supporting shaft (28), said spring supporting shaft (28) terminating in said enlarged portion (15).
Claim 2
Dependent Claim
130 words
A shock absorbing arrangement for a bicycle comprising in combination: a. a head arbor (11) for holding a vertical handle shaft (13) having a lower enlarged portion (15) and an upper fitting unit (17); b. a front fork (16) including a pair of pipes (23) for a front wheel (24) and fastening pieces (21) for fastening said front fork (16) to said fitting unit (17); and, c. a spring holder (26) held between said pipes (23) having an aperture (27) and a spring supporting shaft (28) passing through said aperture (27), said spring supporting shaft (28) having an inner base (33) and an outer retaining nut (32) with spring means (34, 35) held on said spring supporting shaft (28), said spring supporting shaft (28) terminating in said enlarged portion (15).
Claim 3
Dependent Claim
17 words
An arrangement as claimed in claim 1, said spring means being first and second springs (34, 35).
References Cited (Backward Citations)
GB190123575A
Cited
GB190700499A
Cited
US1206210A
Cited
GB111233A
Cited
FR580257A
Cited
FR842561A
Cited
US2188968A
Cited
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Cited
US2550876A
Cited
DE935049C
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-03-16 | 1979-09-15 | 1980-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-16 | 1983-09-15 | 1984-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-16 | 1987-09-15 | 1988-03-16 | $7700.00 | Window Closed / Lapsed |