Patent US4428471A successfully refreshed from Google Patents.
US4428471A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Clutch operator with a hydraulic actuator
Assignee: Motors Liquidation Co
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Filing: 1982-03-26
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Granted: 1984-01-31
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Expires: 2002-03-26
Abstract
Abstract A clutch operating structure has a hydraulic actuator and a lever which are disposed within the clutch housing. The actuator includes a piston which is slidably disposed in a housing secured within the clutch housing by a fastener. The piston operates on the lever which is pivotally mounted at one end by the securing fastener, while the other end of the lever operates the clutch throwout bearing. Engagement and disengagement of the clutch is controlled by the vehicle operator through a pedal actuated hydraulic device which pressurizes the piston nearing clutch disengagement.
Inventors
- 👤 Donald L. Parker
- 👤 Edward H. Warwick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:23
CPC Classifications
F; F16; F16D; F16D25/00; F16D25/08; F16D25/088
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
159 words
A clutch operating structure for a selectively operable friction clutch which is rotatably mounted wholly within a clutch housing, said structure comprising; a cavity formed in the clutch housing; a cylinder and pivot support housing supported in said cavity and including a hydraulic cylinder portion and a lever support portion; means securing said cylinder and pivot support housing to said clutch housing and being positioned for providing a pivot surface; a clutch operating lever having one end pivotally disposed on said pivot surface and the other end operatively connected with said friction clutch; piston means slidably disposed in said cylinder portion; spring means disposed in said cylinder portion for maintaining said piston means in abutting relation with said clutch operating lever intermediate the ends thereof; and fluid passage means in communication with said cylinder portion for conducting pressurized fluid thereto for actuating said piston means to cause pivoting of said clutch operating lever for selectively operating said friction clutch.
Claim 2
Dependent Claim
159 words
A clutch operating structure for a selectively operable friction clutch which is rotatably mounted wholly within a clutch housing, said structure comprising; a cavity formed in the clutch housing; a cylinder and pivot support housing supported in said cavity and including a hydraulic cylinder portion and a lever support portion; means securing said cylinder and pivot support housing to said clutch housing and being positioned for providing a pivot surface; a clutch operating lever having one end pivotally disposed on said pivot surface and the other end operatively connected with said friction clutch; piston means slidably disposed in said cylinder portion; spring means disposed in said cylinder portion for maintaining said piston means in abutting relation with said clutch operating lever intermediate the ends thereof; and fluid passage means in communication with said cylinder portion for conducting pressurized fluid thereto for actuating said piston means to cause pivoting of said clutch operating lever for selectively operating said friction clutch.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-01-30 | 1987-08-01 | 1988-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-01-30 | 1991-08-01 | 1992-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-01-30 | 1995-08-01 | 1996-01-31 | $7700.00 | Window Closed / Lapsed |