US3817358A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for disengaging a clutch in the transmission of a vehicle
Assignee: Girling Ltd
•
Filing: 1972-11-10
•
Granted: 1974-06-18
•
Expires: 1992-11-10
Abstract
Abstract In a system for disengaging a clutch in a vehicle transmission a sensor provides a control unit with an electrical output related to the speed of the vehicle engine, and the control unit is arranged to send an operating signal to clutch disengaging means when the deceleration of the engine exceeds or its speed falls below a predetermined value.
Inventors
- 👤 W Hess
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:29
CPC Classifications
F; F16; F16D; F16D23/00; F16D23/12
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
89 words
A system for disengaging a clutch in the transmission of a vehicle having an engine, comprising a sensor monitoring the speed of said engine and providing a signal related to said speeds; a control unit for receiving said signals, differentiating the same to obtain an output signal corresponding to the deceleration of said engine, and comparing said output signal to a predetermined value of engine decleration, and providing a signal if said deceleration related output exceeds said predetermined value; and means operable by said signal to disengage said clutch.
Claim 2
Independent Claim
89 words
A system for disengaging a clutch in the transmission of a vehicle having an engine, comprising a sensor monitoring the speed of said engine and providing a signal related to said speeds; a control unit for receiving said signals, differentiating the same to obtain an output signal corresponding to the deceleration of said engine, and comparing said output signal to a predetermined value of engine decleration, and providing a signal if said deceleration related output exceeds said predetermined value; and means operable by said signal to disengage said clutch.
Claim 3
Dependent Claim
28 words
A system as in claim 1 wherein said control unit automatically cancels said signal a predetermined time interval after provIding said signal thereby allowing said clutch to re-engage.
Claim 4
Dependent Claim
44 words
A system as in claim 1 wherein said sensor is an A.C. generator having a rotor which is rotated by the crank shaft of said vehicle engine, the A.C. output of said generator being fed to said control unit which provides a D.C. signal.
Claim 5
Dependent Claim
16 words
A system as in claim 1 including a manual switch for rendering said control unit inoperative.
Claim 6
Dependent Claim
29 words
A system as in claim 1 wherein said clutch includes a clutch withdrawal lever and said clutch disengaging means comprises an electrically operated actuator linked directly to said lever.
Claim 7
Dependent Claim
17 words
A system as in claim 1 wherein said clutch disengaging means includes means for damping clutch re-engagement.
References Cited (Backward Citations)
US2924313A
Cited
US2979171A
Cited
US3134470A
Cited
US3232399A
Cited
US3385986A
Cited
US3437188A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-17 | 1977-12-17 | 1978-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-17 | 1981-12-17 | 1982-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-17 | 1985-12-17 | 1986-06-18 | $7700.00 | Window Closed / Lapsed |