US4260170A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Motorcycle having a leading axle type front fork assembly
Assignee: Yamaha Motor Co Ltd
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Filing: 1979-06-20
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Granted: 1981-04-07
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Expires: 1999-06-20
Abstract
Abstract Motorcycle having a head pipe for mounting a front fork assembly for movement about a steering axis which is inclined rearwardly with respect to a vertical line to define a caster angle. The front fork assembly has an axis which is inclined rearwardly with respect to a vertical line by an angle smaller than the caster angle. The front fork assembly supports the front axle along the front side at a position upwardly distant from the lower end thereof.
Inventors
- 👤 Kazuo Terai
- 👤 Takeshi Nagase
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:31
CPC Classifications
B; B62; B62K; B62K21/00; B62K21/02; B62J; B62J11/00; B62J11/10; B62J11/19
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
130 words
Motorcycle comprising a frame, a front fork assembly having a front side and a lower end portion and mounted on the frame through a steering head which connects the front fork assembly to the frame for steering movement about a steering axis which is inclined rearwardly with respect to a vertical line to define a caster angle, a front wheel mounted on the front fork assembly through a front axle, said front fork assembly being inclined rearwardly with respect to a vertical line by an angle smaller than the caster angle, said front axle being located along the front side of and above the lower end portion of the front fork assembly so that the front axle is connected with the front fork assembly axially above the lower end thereof.
Claim 2
Dependent Claim
130 words
Motorcycle comprising a frame, a front fork assembly having a front side and a lower end portion and mounted on the frame through a steering head which connects the front fork assembly to the frame for steering movement about a steering axis which is inclined rearwardly with respect to a vertical line to define a caster angle, a front wheel mounted on the front fork assembly through a front axle, said front fork assembly being inclined rearwardly with respect to a vertical line by an angle smaller than the caster angle, said front axle being located along the front side of and above the lower end portion of the front fork assembly so that the front axle is connected with the front fork assembly axially above the lower end thereof.
Claim 3
Dependent Claim
63 words
Motorcycle in accordance with claim 1 in which said front fork assembly includes a telescopic shock absorbing device having a pair of parallel inner tubes slidably received by a pair of parallel outer tubes, each of said outer tubes having a front side formed with an axle bracket which is upwardly distant from lower end thereof and adapted for mounting the front axle.
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) | 1984-04-06 | 1984-10-06 | 1985-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-04-06 | 1988-10-06 | 1989-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-04-06 | 1992-10-06 | 1993-04-07 | $7700.00 | Window Closed / Lapsed |