Patent US3896680A successfully refreshed from Google Patents.
US3896680A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Twist-grip control for motorcycle clutch
Assignee: Individual
•
Filing: 1974-07-08
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Granted: 1975-07-29
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Expires: 1994-07-08
Abstract
Abstract This device is designed to replace the standard clutch lever. It includes primarily a handle grip with a cam, the device being held to the handle bar of the motorcycle by a cable holding clamp device and roller and lever means in conjunction with the cam surface, serves to actuate the motorcycle clutch.
Inventors
- 👤 Billy D Shoemaker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:15
CPC Classifications
B; B62; B62K; B62K23/00; B62K23/02; B62K23/04; G; G05; G05G; G05G11/00; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18856; Y10T74/20; Y10T74/20207; Y10T74/20256; Y10T74/20268; Y10T74/2028; Y10T74/20287
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
56 words
A twist-grip clutch for motorcycles, comprising a handle grip cam combination, a cable holding bar clamp retained within said cam, bolt fastener means secured within said clamp, a pivotable actuated lever secured to said clamp with fastener means and a pivotable roller secured to said actuating lever, the structure moving cable means of the vehicle''s clutch.
Claim 2
Dependent Claim
56 words
A twist-grip clutch for motorcycles, comprising a handle grip cam combination, a cable holding bar clamp retained within said cam, bolt fastener means secured within said clamp, a pivotable actuated lever secured to said clamp with fastener means and a pivotable roller secured to said actuating lever, the structure moving cable means of the vehicle''s clutch.
Claim 3
Dependent Claim
85 words
The combination according to claim 1, wherein said handle grip and cam combination are freely received upon one end of the vehicle''s handle bar and said cable holding bar clamp is freely carried with opening means of said cam and said bar clamp is secured fixedly to said handle bar by said bolt fastener which closes the opening of said clamp tightly against the outer periphery of said handle bar and cable of said clutch is freely carried within the outer end of said clamp.
Claim 4
Dependent Claim
82 words
The combination according to claim 2, wherein the actuating lever is pivotably secured to said cable holding bar clamp by bolt fastener means, the outer end portion of one end of said actuating lever being secured fixedly to said cable of said clutch and the opposite end of said actuating lever is provided with said roller which is secured by bolt fastener means to said lever, said roller being in rolling engagement with the cam surface of said cam of said device.
Claim 5
Dependent Claim
48 words
The combination according to claim 3, wherein said handle grip and said cam when rotated counter clockwise, will urge said roller forwardly above said handle bar and said lever moves said clutch cable and once said grip is rotated clockwise said lever is rotated in the opposite direction.
References Cited (Backward Citations)
US1281043A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-07-28 | 1979-01-27 | 1979-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-28 | 1983-01-27 | 1983-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-28 | 1987-01-27 | 1987-07-29 | $7700.00 | Window Closed / Lapsed |