Patent US3822771A successfully refreshed from Google Patents.
US3822771A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Interrelated controls for a motor and slipping clutch
Assignee: Caterpillar Inc
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Filing: 1971-12-27
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Granted: 1974-07-09
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Expires: 1991-12-27
Abstract
Abstract A control system for a vehicular drive train including a slipping clutch for proportioning power from a prime mover to implements and a primary output shaft of the vehicle including a manual control conditioned by a manual selector to vary engagement of the slipping clutch through a regulating valve in a first mode of vehicle operation and to regulate acceleration of the prime mover in a second mode of vehicle operation. Additional elements of the control system include an adjustable wheel slip sensing mechanism preferably associated with the manual control, a bypass valve associated with the regulating valve and preferably with a hydraulically operable transmission in the drive train for maintaing a positive drive coupling through a torque coverter coupled with the slipping clutch and an input valve also associated with the transmission to condition the slipping clutch for receiving a substantial portion of shock loading applied to the drive train.
Inventors
- 👤 S Audiffred
- 👤 L Johnson
- 👤 S Pearce
- 👤 D Bump
- 👤 R Erkkila
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:30
CPC Classifications
F; F16; F16H; F16H47/00; F16H47/06; F16H45/00; F16H2045/002
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
286 words
A hydraulic control system for the power train of a vehicle having auxiliary equipment and a transmission coupled with a ground wheel of the vehicle, the power train including a prime mover, power input means coupling the prime mover with auxiliary equipment, slipping clutch means for selectively coupling the input means with a portion of a torque converter and power output means coupled between the torque converter and the transmission, comprising valve means for hydraulically regulating engagement of the slipping clutch means, manual control means, adjustable selector means and linkage means operatively coupling the manual control means, the adjustable selector means, the valve means and accelerator control means for the prime mover, the selector means being adjustable to condition the manual control means for regulating engagement of the slipping clutch means through the valve means in a first mode of vehicle operation and for regulating the prime mover through the accelerator control means in a second mode of vehicle operation to facilitate matching of available power from the prime mover with requirements of the auxiliary equipment and vehicle ground wheel under different operating conditions, the selector means being adjustable to a first position to provide the first mode of vehicle operation through the manual control means and to adjust the accelerator control means for full throttle operation of the prime mover, the selector means also being adjustable to a second position to provide the second mode of vehicle operation through the manual control means and to condition the valve means for substantially full engagement of the slipping clutch means, the linkage means including lost motion connections between the manual control means and the valve means and between the manual control means and the accelerator control means.
Claim 2
Dependent Claim
286 words
A hydraulic control system for the power train of a vehicle having auxiliary equipment and a transmission coupled with a ground wheel of the vehicle, the power train including a prime mover, power input means coupling the prime mover with auxiliary equipment, slipping clutch means for selectively coupling the input means with a portion of a torque converter and power output means coupled between the torque converter and the transmission, comprising valve means for hydraulically regulating engagement of the slipping clutch means, manual control means, adjustable selector means and linkage means operatively coupling the manual control means, the adjustable selector means, the valve means and accelerator control means for the prime mover, the selector means being adjustable to condition the manual control means for regulating engagement of the slipping clutch means through the valve means in a first mode of vehicle operation and for regulating the prime mover through the accelerator control means in a second mode of vehicle operation to facilitate matching of available power from the prime mover with requirements of the auxiliary equipment and vehicle ground wheel under different operating conditions, the selector means being adjustable to a first position to provide the first mode of vehicle operation through the manual control means and to adjust the accelerator control means for full throttle operation of the prime mover, the selector means also being adjustable to a second position to provide the second mode of vehicle operation through the manual control means and to condition the valve means for substantially full engagement of the slipping clutch means, the linkage means including lost motion connections between the manual control means and the valve means and between the manual control means and the accelerator control means.
Claim 3
Dependent Claim
231 words
A hydraulic control system for the power train of a vehicle having auxiliary equipment and a transmission coupled with a ground wheel of the vehicle, the power train including a prime mover, power input means coupling the prime mover with auxiliary equipment, slipping clutch means for selectively coupling the input means with a portion of a torque converter and power output means coupled between the torque converter and the transmission, comprising valve means for hydraulically regulating engagement of the slipping clutch means, manual control means, adjustable selector means and linkage means operatively coupling the manual control means, the adjustable selector means, the valve means and accelerator control means for the prime mover, tHe selector means being adjustable to condition the manual control means for regulating engagement of the slipping clutch means through the valve means in a first mode of vehicle operation and for regulating the prime mover through the accelerator control means in a second mode of vehicle operation and for regulating the prime mover through the accelerator control means in a second mode of vehicle operation to facilitate matching of available power from the prime mover with requirements of the auxiliary equipment and vehicle ground wheel under different operating conditions, the linkage means including lost motion connection means for coupling the manual control means with the valve means and accelerator control means to permit the two modes of operation.
Claim 4
Dependent Claim
231 words
A hydraulic control system for the power train of a vehicle having auxiliary equipment and a transmission coupled with a ground wheel of the vehicle, the power train including a prime mover, power input means coupling the prime mover with auxiliary equipment, slipping clutch means for selectively coupling the input means with a portion of a torque converter and power output means coupled between the torque converter and the transmission, comprising valve means for hydraulically regulating engagement of the slipping clutch means, manual control means, adjustable selector means and linkage means operatively coupling the manual control means, the adjustable selector means, the valve means and accelerator control means for the prime mover, tHe selector means being adjustable to condition the manual control means for regulating engagement of the slipping clutch means through the valve means in a first mode of vehicle operation and for regulating the prime mover through the accelerator control means in a second mode of vehicle operation and for regulating the prime mover through the accelerator control means in a second mode of vehicle operation to facilitate matching of available power from the prime mover with requirements of the auxiliary equipment and vehicle ground wheel under different operating conditions, the linkage means including lost motion connection means for coupling the manual control means with the valve means and accelerator control means to permit the two modes of operation.
Claim 5
Dependent Claim
41 words
The control system of claim 2 further comprising wheel slip limiting means associated therewith for providing a signal when a selected level of torque is being transferred through the slipping clutch means, torque converter and transmission to the vehicle ground wheel.
Claim 6
Dependent Claim
252 words
A hydraulic control system for the power train of a vehicle having auxiliary equipment and a transmission coupled with a ground wheel of the vehicle, the power train including a prime mover, power input means coupling the prime mover with auxiliary equipment, slipping clutch means for selectively coupling the input means with a portion of a torque converter and power output means coupled between the torque converter and the transmission, comprising valve means for hydraulically regulating engagement of the slipping clutch means, manual control means, adjustable selector means, linkage means operatively coupling the manual control means, the adjustable selector means, the valve means and accelerator control means for the prime mover, the selector means being adjustable to condition the manual control means for regulating engagement of the slipping clutch means through the valve means in a first mode of vehicle operation and for regulating the prime mover through the accelerator control means in a second mode of vehicle operation to facilitate matching of available power from the prime mover with requirements of the auxiliary equipment and vehicle ground wheel under different operating conditions, and wheel slip limiting means associated therewith for providing a signal when a selected level of torque is being transferred through the slipping clutch means, torque converter and transmission to the vehicle ground wheel, the wheel slip limiting means being coupled with the manual control means, the wheel slip limiting means including means for resisting operation of the manual control means to indicate the selected level of torque transfer.
Claim 7
Dependent Claim
252 words
A hydraulic control system for the power train of a vehicle having auxiliary equipment and a transmission coupled with a ground wheel of the vehicle, the power train including a prime mover, power input means coupling the prime mover with auxiliary equipment, slipping clutch means for selectively coupling the input means with a portion of a torque converter and power output means coupled between the torque converter and the transmission, comprising valve means for hydraulically regulating engagement of the slipping clutch means, manual control means, adjustable selector means, linkage means operatively coupling the manual control means, the adjustable selector means, the valve means and accelerator control means for the prime mover, the selector means being adjustable to condition the manual control means for regulating engagement of the slipping clutch means through the valve means in a first mode of vehicle operation and for regulating the prime mover through the accelerator control means in a second mode of vehicle operation to facilitate matching of available power from the prime mover with requirements of the auxiliary equipment and vehicle ground wheel under different operating conditions, and wheel slip limiting means associated therewith for providing a signal when a selected level of torque is being transferred through the slipping clutch means, torque converter and transmission to the vehicle ground wheel, the wheel slip limiting means being coupled with the manual control means, the wheel slip limiting means including means for resisting operation of the manual control means to indicate the selected level of torque transfer.
Claim 8
Dependent Claim
24 words
The control system of claim 4 wherein the wheel slip limiting means includes manually adjustable means for varying the selected level of torque transfer.
Claim 9
Dependent Claim
25 words
The control system of claim 4 wherein the wheel slip limiting means yieldingly resists operation of the manual control means to permit its being overridden.
Claim 10
Dependent Claim
48 words
The control system of claim 6 wherein the wheel slip limiting means comprises two relatively moveable members coupled by spring means, one of the members being connected to an adjusting element for positioning the one member, the other member being arranged for interaction with the manual control means.
Claim 11
Dependent Claim
271 words
A hydraulic control system for the power train of a vehicle having auxiliary equipment and a transmission coupled with a ground wheel of the vehicle, the power train including a prime mover, power input means coupling the prime mover with auxiliary equipment, slipping clutch means for selectively coupling the input means with a portion of a torque converter and power output means coupled between the torque converter and the transmission, comprising valve means for hydraulically regulating engagement of the slipping clutch means, manual control means, adjustable selector means and linkage means operatively coupling the manual control means, the adjustable selector means, the valve means anD accelerator control means for the prime mover, the selector means being adjustable to condition the manual control means for regulating engagement of the slipping clutch means through the valve means in a first mode of vehicle operation and for regulating the prime mover through the accelerator control means in a second mode of vehicle operation to facilitate matching of available power from the prime mover with requirements of the auxiliary power from the prime mover with requirements of the auxiliary equipment and vehicle ground wheel under different operating conditions, the valve means comprising an input valve for communicating actuating fluid through an inlet conduit to the slipping clutch means, a regulating valve operatively coupled to the manual control means for communicating a clutch control signal to a hydraulically responsive centrifugal valve in communication with the inlet conduit for the slipping clutch means and a bypass valve operatively coupled to the adjustable selector means, the bypass valve being arranged in parallel flow relation with the regulating valve.
Claim 12
Dependent Claim
271 words
A hydraulic control system for the power train of a vehicle having auxiliary equipment and a transmission coupled with a ground wheel of the vehicle, the power train including a prime mover, power input means coupling the prime mover with auxiliary equipment, slipping clutch means for selectively coupling the input means with a portion of a torque converter and power output means coupled between the torque converter and the transmission, comprising valve means for hydraulically regulating engagement of the slipping clutch means, manual control means, adjustable selector means and linkage means operatively coupling the manual control means, the adjustable selector means, the valve means anD accelerator control means for the prime mover, the selector means being adjustable to condition the manual control means for regulating engagement of the slipping clutch means through the valve means in a first mode of vehicle operation and for regulating the prime mover through the accelerator control means in a second mode of vehicle operation to facilitate matching of available power from the prime mover with requirements of the auxiliary power from the prime mover with requirements of the auxiliary equipment and vehicle ground wheel under different operating conditions, the valve means comprising an input valve for communicating actuating fluid through an inlet conduit to the slipping clutch means, a regulating valve operatively coupled to the manual control means for communicating a clutch control signal to a hydraulically responsive centrifugal valve in communication with the inlet conduit for the slipping clutch means and a bypass valve operatively coupled to the adjustable selector means, the bypass valve being arranged in parallel flow relation with the regulating valve.
Claim 13
Dependent Claim
255 words
A hydraulic control system for a power train of a vehicle, the power train proportioning power from a prime mover to auxiliary equipment and a primary output shaft of the vehicle, the power train including power input means coupling the prime mover with the auxiliary equipment, power output means operatively coupled with the primary output shaft, and a slipping clutch means providing a variable coupling between the power input and output means, comprising valve means for hydraulically regulating engagement of the slipping clutch means, manual control means, adjustable selector means and linkage means operatively coupling the manual control means, the adjustable selector means, the valve means and accelerator control means for the prime mover, the selector means being adjustable to a first position for regulating engagement of the slipping clutch means through the valve means to provide a first mode of vehicle operation through the manual control means, the selector means being effective in its first position to adjust the accelerator control means for substantially full throttle operation of the prime mover, the selector means also being adjustable to a second position for regulating the prime mover through the accelerator control means to provide a second mode of vehicle operation through the manual control means, the selector means being effective in its second position to condition the valve means for substantially full engagement of the slipping clutch means, the linkage means including lost motion connections between the manual control means and the valve means and between the manual control means and the accelerator control means.
Claim 14
Dependent Claim
255 words
A hydraulic control system for a power train of a vehicle, the power train proportioning power from a prime mover to auxiliary equipment and a primary output shaft of the vehicle, the power train including power input means coupling the prime mover with the auxiliary equipment, power output means operatively coupled with the primary output shaft, and a slipping clutch means providing a variable coupling between the power input and output means, comprising valve means for hydraulically regulating engagement of the slipping clutch means, manual control means, adjustable selector means and linkage means operatively coupling the manual control means, the adjustable selector means, the valve means and accelerator control means for the prime mover, the selector means being adjustable to a first position for regulating engagement of the slipping clutch means through the valve means to provide a first mode of vehicle operation through the manual control means, the selector means being effective in its first position to adjust the accelerator control means for substantially full throttle operation of the prime mover, the selector means also being adjustable to a second position for regulating the prime mover through the accelerator control means to provide a second mode of vehicle operation through the manual control means, the selector means being effective in its second position to condition the valve means for substantially full engagement of the slipping clutch means, the linkage means including lost motion connections between the manual control means and the valve means and between the manual control means and the accelerator control means.
Claim 15
Dependent Claim
229 words
A hydraulic control system for a power train of a vehicle, the power train proportioning power from a prime mover to auxiliary equipment and a primary output shaft of the vehicle, the power train including power input means coupling the prime mover with the auxiliary equipment, power output means operatively coupled with the primary output shaft, and a slipping clutch means providing a variable coupling between the power input and output means, comprising valve means for hydraulically regulating engagement of the slipping clutch means, manual control means, adjustable selector means and linkage means operatively coupling the manual control means, the adjustable selector means, the valve means and accelerator control means for the prime mover, the selector means being adjustable to condition the manual control means for regulating engagement of the slipping clutch means through the valve means in a first mode of vehicle operation and for regulating the prime mover through the accelerator control means in a second mode of vehicle operation, the valve means comprising an input valve for communicating actuating fluid through an inlet conduit to the slipping clutch means for communicating a clutch control signal to a hydraulically responsive centrifugal valve in cOmmunication with the inlet conduit for the slipping clutch means and a bypass valve operatively coupled to the adjustable selector means, the bypass valve being arranged in parallel flow relation with the regulating valve.
Claim 16
Dependent Claim
229 words
A hydraulic control system for a power train of a vehicle, the power train proportioning power from a prime mover to auxiliary equipment and a primary output shaft of the vehicle, the power train including power input means coupling the prime mover with the auxiliary equipment, power output means operatively coupled with the primary output shaft, and a slipping clutch means providing a variable coupling between the power input and output means, comprising valve means for hydraulically regulating engagement of the slipping clutch means, manual control means, adjustable selector means and linkage means operatively coupling the manual control means, the adjustable selector means, the valve means and accelerator control means for the prime mover, the selector means being adjustable to condition the manual control means for regulating engagement of the slipping clutch means through the valve means in a first mode of vehicle operation and for regulating the prime mover through the accelerator control means in a second mode of vehicle operation, the valve means comprising an input valve for communicating actuating fluid through an inlet conduit to the slipping clutch means for communicating a clutch control signal to a hydraulically responsive centrifugal valve in cOmmunication with the inlet conduit for the slipping clutch means and a bypass valve operatively coupled to the adjustable selector means, the bypass valve being arranged in parallel flow relation with the regulating valve.
Claim 17
Dependent Claim
196 words
A hydraulic control system for a power train of a vehicle, the power train proportioning power from a prime mover to auxiliary equipment and a primary output shaft of the vehicle, the power train including power input means coupling the prime mover with the auxiliarly equipment, power output means operatively coupled with the primary output shaft, and a slipping clutch means providing a variable coupling between the power input and output means, comprising valve means for hydraulically regulating engagement of the slipping clutch means, manual control means, adjustable selector means and linkage means operatively coupling the manual control means, the adjustable selector means, the valve means and accelerator control means for the prime mover, the selector means being adjustable to condition the manual control means for regulating engagement of the slipping clutch means through the valve means in a first mode of vehicle operation and for regulating the prime mover through the accelerator control means in a second mode of vehicle operation, slip limiting means being associated with the manual control means for providing a feedback signal when a selected level of torque is being transferred through the slipping clutch means to the primary output shaft.
Claim 18
Dependent Claim
196 words
A hydraulic control system for a power train of a vehicle, the power train proportioning power from a prime mover to auxiliary equipment and a primary output shaft of the vehicle, the power train including power input means coupling the prime mover with the auxiliarly equipment, power output means operatively coupled with the primary output shaft, and a slipping clutch means providing a variable coupling between the power input and output means, comprising valve means for hydraulically regulating engagement of the slipping clutch means, manual control means, adjustable selector means and linkage means operatively coupling the manual control means, the adjustable selector means, the valve means and accelerator control means for the prime mover, the selector means being adjustable to condition the manual control means for regulating engagement of the slipping clutch means through the valve means in a first mode of vehicle operation and for regulating the prime mover through the accelerator control means in a second mode of vehicle operation, slip limiting means being associated with the manual control means for providing a feedback signal when a selected level of torque is being transferred through the slipping clutch means to the primary output shaft.
Claim 19
Dependent Claim
47 words
The hydraulic control system of claim 11 wherein the slip limiting means is coupled with the manual control means, the slip limiting means including manually adjustable means for resisting operation of the manual control means to indicate the selected level of torque transfer under different operation conditions.
Claim 20
Dependent Claim
189 words
A hydraulic control system for a power train, the power train proportioning power from a prime mover to auxiliary equipment and a primary output shaft, the power train including an input means coupling the prime mover with the auxiliary equipment, an output means operatively coupled with the primary output shaft and a slipping clutch means providing a variable coupling between the input and output means, comprising adjustable valve means for hydraulically regulating engagement of the slipping clutch means, manual control means coupled with the valve means for adjustment thereof and slip limiting means operatively coupled with the manual control means for providing a feedback signal when a selected level of torque is being transferred through the slipping clutch means, linkage means operatively coupling the manual control means, the valve means, an accelerator control means for the prime mover and an adjustable selector means, the selector means being adjustable to condition the manual control means for regulating engagement of the slipping clutch means through the valve means in a first mode of operation and for regulating the prime mover through the accelerator control means in a second mode of operation.
Claim 21
Dependent Claim
189 words
A hydraulic control system for a power train, the power train proportioning power from a prime mover to auxiliary equipment and a primary output shaft, the power train including an input means coupling the prime mover with the auxiliary equipment, an output means operatively coupled with the primary output shaft and a slipping clutch means providing a variable coupling between the input and output means, comprising adjustable valve means for hydraulically regulating engagement of the slipping clutch means, manual control means coupled with the valve means for adjustment thereof and slip limiting means operatively coupled with the manual control means for providing a feedback signal when a selected level of torque is being transferred through the slipping clutch means, linkage means operatively coupling the manual control means, the valve means, an accelerator control means for the prime mover and an adjustable selector means, the selector means being adjustable to condition the manual control means for regulating engagement of the slipping clutch means through the valve means in a first mode of operation and for regulating the prime mover through the accelerator control means in a second mode of operation.
Claim 22
Dependent Claim
61 words
The control system of claim 13 wherein the linkage means includes means through which the selector means adjusts the accelerator control means for full throttle operation of the prime mover during the first mode of operation and through which the selector means adjusts the valve means for substantially fully engagement of the slipping clutch means during the second mode of operation.
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) | 1977-07-08 | 1978-01-07 | 1978-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-08 | 1982-01-07 | 1982-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-08 | 1986-01-07 | 1986-07-09 | $7700.00 | Window Closed / Lapsed |