US4614507A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transmission chain adjuster for motorcycles
Assignee: Yamaha Motor Co Ltd
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Filing: 1985-03-14
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Granted: 1986-09-30
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Expires: 2005-03-14
Abstract
Abstract An off the road motorcycle having a balloon tired rear wheel that is suspended by a trailing arm and which is driven by a pair of flexible transmitters, one positioned closer to the motorcycle center line than the other so as to provide clearance for the rider's feet. An arrangement is provided for adjusting the tension in each of the two chains and one of these adjusting mechanisms moves the pivot point of the trailing arm relative to the frame.
Inventors
- 👤 Katsuya Ishino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:26
CPC Classifications
F; F16; F16H; F16H7/00; F16H7/08; F16H7/10; F16H7/14; B; B62; B62K; B62K25/00; B62K25/04; B62K25/28; B62K25/283; B62M; B62M9/00; B62M9/16
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
167 words
A chain drive for a wheeled vehicle comprising frame means, power means carried by said frame means for driving a drive shaft rotatably about a first axis extending transversely to the longitudinal axis of said frame means, trailing arm means supported for pivotal movement about a pivot axis by said frame means, an idler shaft rotatably journaled on said trailing arm means about a second axis parallel to said first axis and said pivot axis and spaced therefrom, first flexible transmitter means driving said idler shaft from said drive shaft, a wheel journaled by said trailing arm means for rotation about a third axis spaced from said first, said second and said pivot axes, second flexible transmitter means for driving said wheel from said idler shaft, and means for simultaneously adjusting the distance between said first axis and said second axis and the distance between said second axis and sais third axis for adjusting the tension of each of said first and said second flexible transmitter means.
Claim 2
Dependent Claim
167 words
A chain drive for a wheeled vehicle comprising frame means, power means carried by said frame means for driving a drive shaft rotatably about a first axis extending transversely to the longitudinal axis of said frame means, trailing arm means supported for pivotal movement about a pivot axis by said frame means, an idler shaft rotatably journaled on said trailing arm means about a second axis parallel to said first axis and said pivot axis and spaced therefrom, first flexible transmitter means driving said idler shaft from said drive shaft, a wheel journaled by said trailing arm means for rotation about a third axis spaced from said first, said second and said pivot axes, second flexible transmitter means for driving said wheel from said idler shaft, and means for simultaneously adjusting the distance between said first axis and said second axis and the distance between said second axis and sais third axis for adjusting the tension of each of said first and said second flexible transmitter means.
Claim 3
Dependent Claim
31 words
A chain drive for a wheeled vehicle as set forth in claim 1 wherein the means for adjusting adjusts the location of the second axis relative to the trailing arm means.
Claim 4
Dependent Claim
42 words
A chain drive for a wheeled vehicle as set forth in claim 2 wherein the second axis is defined by eccentric bushing means carried by the trailing arm means and the means for adjusting comprises means for rotating the eccentric bushing means.
Claim 5
Dependent Claim
37 words
A chain drive for a wheeled vehicle as set forth in claim 3 wherein the first flexible transmitter means is disposed closer to the longitudinal center line of the frame means than the second flexible transmitter means.
Claim 6
Dependent Claim
52 words
A chain drive for a wheeled vehicle as set forth in claim 4 wherein the wheeled vehicle comprises a motorcycle having a front wheel and a rear wheel, the rear wheel being mounted by the trailing arm means and having a substantially greater width than the frame means and the front wheel.
Claim 7
Dependent Claim
154 words
A chain drive for a wheeled vehicle comprising frame means, power means carried by said frame means for driving a drive shaft rotatably about a first axis extending transversely to the longitudinal axis of said frame means, trailing arm means supported for pivotal movement about a pivot axis by said frame means, an idler shaft rotatably journaled on said trailing arm means about a second axis parallel to said first axis and said pivot axis and spaced therefrom, first flexible transmitter means driving said idler shaft from said drive shaft, a wheel journaled by said trailing arm means for rotation about a third axis spaced from said first, said second and said pivot axes, second flexible transmitter means for driving said wheel from said idler shaft, and means for adjusting the distance between said second and said third axes independently of movement of said third axis for tensioning of said second flexible transmitter means.
Claim 8
Dependent Claim
154 words
A chain drive for a wheeled vehicle comprising frame means, power means carried by said frame means for driving a drive shaft rotatably about a first axis extending transversely to the longitudinal axis of said frame means, trailing arm means supported for pivotal movement about a pivot axis by said frame means, an idler shaft rotatably journaled on said trailing arm means about a second axis parallel to said first axis and said pivot axis and spaced therefrom, first flexible transmitter means driving said idler shaft from said drive shaft, a wheel journaled by said trailing arm means for rotation about a third axis spaced from said first, said second and said pivot axes, second flexible transmitter means for driving said wheel from said idler shaft, and means for adjusting the distance between said second and said third axes independently of movement of said third axis for tensioning of said second flexible transmitter means.
Claim 9
Dependent Claim
31 words
A chain drive for a wheeled vehicle as set forth in claim 6 wherein the means for adjusting adjusts the location of the second axis relative to the trailing arm means.
Claim 10
Dependent Claim
42 words
A chain drive for a wheeled vehicle as set forth in claim 7 wherein the second axis is defined by eccentric bushing means carried by the trailing arm means and the means for adjusting comprises means for rotating the eccentric bushing means.
Claim 11
Dependent Claim
37 words
A chain drive for a wheeled vehicle as set forth in claim 8 wherein the first flexible transmitter means is disposed closer to the longitudinal center line of the frame means than the second flexible transmitter means.
Claim 12
Dependent Claim
52 words
A chain drive for a wheeled vehicle as set forth in claim 9 wherein the wheeled vehicle comprises a motorcycle having a front wheel and a rear wheel, the rear wheel being mounted by the trailing arm means and having a substantially greater width than the frame means and the front wheel.
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) | 1989-09-29 | 1990-03-31 | 1990-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-09-29 | 1994-03-31 | 1994-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-09-29 | 1998-03-31 | 1998-09-30 | $7700.00 | Window Closed / Lapsed |