US4567958A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power transmission system for motorcycles
Assignee: Honda Motor Co Ltd
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Filing: 1983-09-20
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Granted: 1986-02-04
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Expires: 2003-09-20
Abstract
Abstract A motorcycle having a power unit of unitary structure pivotally mounted to the motorcycle. The power unit includes an engine, a variable ratio V-belt drive transmission, a centrifugal clutch and a rear axle assembly. The centrifugal clutch is located above a line extending between the output shaft of the engine and the rear axle. The driven pulley of the variable ratio V-belt drive includes a sealed lubricated portion containing a splined joint accommodating the relative axial displacement between the pulley halves. A gear train connects the output of the clutch, which is associated with the driven pulley, to the rear axle.
Inventors
- 👤 Takeo Ishihara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:31
CPC Classifications
B; B62; B62M; B62M7/00; B62M7/02; B62M7/06; F; F02; F02B; F02B61/00; F02B61/02
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
58 words
A power transmission system for a motorcycle, comprising a rear axle; an engine having an output shaft parallel to said rear axle; and a clutch intermediate said output shaft and said rear axle and having an axis parallel to said rear axle and above a straight line between said rear axle and said output shaft of said engine.
Claim 2
Dependent Claim
58 words
A power transmission system for a motorcycle, comprising a rear axle; an engine having an output shaft parallel to said rear axle; and a clutch intermediate said output shaft and said rear axle and having an axis parallel to said rear axle and above a straight line between said rear axle and said output shaft of said engine.
Claim 3
Dependent Claim
18 words
The power transmission system of claim 1 further comprising a gear between said clutch and said rear axle.
Claim 4
Dependent Claim
22 words
The power transmission system of claim 1 wherein said rear axle, said engine and said clutch are assembled as a unitary structure.
Claim 5
Dependent Claim
27 words
The power transmission system of claim 1 further comprising a variable speed ratio V-belt drive coupled to said output shaft of said engine and to said clutch.
Claim 6
Dependent Claim
25 words
The power transmission system of claim 4 wherein said rear axle, said engine, said clutch and said V-belt drive are assembled as a unitary structure.
Claim 7
Dependent Claim
18 words
The power transmission system of claim 5 further comprising a gear between said clutch and said rear axle.
Claim 8
Dependent Claim
72 words
A motorcycle comprising a frame; and a power unit pivotally mounted to said frame and including an engine, a transmission, a clutch and a rear axle, said power unit being assembled as a unitary structure, said engine having an output shaft parallel to said rear axle, said clutch having an axis parallel to said rear axle and above a straight line between said rear axle and said output shaft of said engine.
Claim 9
Dependent Claim
72 words
A motorcycle comprising a frame; and a power unit pivotally mounted to said frame and including an engine, a transmission, a clutch and a rear axle, said power unit being assembled as a unitary structure, said engine having an output shaft parallel to said rear axle, said clutch having an axis parallel to said rear axle and above a straight line between said rear axle and said output shaft of said engine.
Claim 10
Dependent Claim
26 words
The motorcycle of claim 7 wherein said transmission is a variable ratio V-belt drive coupled to said output shaft of said engine and to said clutch.
Claim 11
Dependent Claim
27 words
The motorcycle of claim 7 further comprising a cushion member extending between said frame and said power unit to resiliently control pivotal movement of said power unit.
Claim 12
Dependent Claim
107 words
A motorcycle comprising a frame; a pivot link pivotally mounted to said frame; a power unit including an engine, a variable ratio V-belt drive transmission, a clutch and a rear axle, said power unit being unitary in structure and being pivotally mounted to said pivot link at a first end thereof displaced from said rear axle about an axis parallel to said rear axle; a cushion member extending between said frame and said power unit to resiliently control pivotal movement of said power unit; and a gear between said clutch and said rear axle, the axis of said clutch being displaced and parallel to said rear axle.
Claim 13
Dependent Claim
107 words
A motorcycle comprising a frame; a pivot link pivotally mounted to said frame; a power unit including an engine, a variable ratio V-belt drive transmission, a clutch and a rear axle, said power unit being unitary in structure and being pivotally mounted to said pivot link at a first end thereof displaced from said rear axle about an axis parallel to said rear axle; a cushion member extending between said frame and said power unit to resiliently control pivotal movement of said power unit; and a gear between said clutch and said rear axle, the axis of said clutch being displaced and parallel to said rear axle.
Claim 14
Dependent Claim
20 words
The motorcycle of claim 10 wherein the axis of said clutch is higher on the motorcycle than said rear axle.
References Cited (Backward Citations)
US3756338A
Cited
US4374549A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-02-03 | 1989-08-05 | 1990-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-02-03 | 1993-08-05 | 1994-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-02-03 | 1997-08-05 | 1998-02-04 | $7700.00 | Window Closed / Lapsed |