Patent US4150721A successfully refreshed from Google Patents.
US3216541A
Expired / Lapsed
US
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Control system for operating the drive clutches of motor vehicles
Assignee: SAARBERGTECHNIK GmbH
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Filing: 1962-12-17
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Granted: 1965-11-09
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Expires: 1982-12-17
Abstract
No abstract record available.
Inventors
- 👤 Steffen Egon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:00
CPC Classifications
B; B62; B62D; B62D11/00; B62D11/02; B62D11/06; B62D11/08; F; F16; F16D; F16D25/00; F16D25/10; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19023; Y10T74/19074; Y10T74/19079; Y10T74/19084
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
129 words
A CONTROL SYSTEM FOR SELECTIVELY OPERATING THE CHANGEOVER CLUTCHES OF ROTATABLE SHAFT MEANS COMPRISING A FLUID RESERVOIR, FIRST VALVE MEANS CONNECTED TO SAID FLUID RESERVOIR, MEANS FOR FEEDING FLUID FROM SAID FLUID RESERVOIR UNDER PRESSURE TO SAID FIRST VALVE MEANS, FLUID ACTUATED MOTOR MEANS OPERATIVELY CONNECTED TO SAID CHANGE-OVER CLUTCHES, CONDUIT MEANS FOR CONNECTING SAID FIRST VALVE MEANS TO SAID FLUID ACTUATED MOTOR MEANS, SAID FIRST VALVE MEANS BEING OPERABLE TO PASS FLUID FROM SAID RESERVOIR SELECTIVELY TO SAID MOTOR MEANS SECOND VALVE MEANS CONNECTED TO SAID CONDUIT MEANS AND ADAPTED TO INTERRUPT THE FLOW OF PRESSURIZED FLUID TO SAID MOTOR MEANS, BRAKE CONTROL MEANS CONNECTED TO SAID SECOND VALVE MEANS, AND MEANS FOR ACTUATING SAID SECOND VALVE MEANS IN RESPONSE TO THE OPERATION OF SAID BRAKE CONTROL MEANS.
Claim 2
Dependent Claim
129 words
A CONTROL SYSTEM FOR SELECTIVELY OPERATING THE CHANGEOVER CLUTCHES OF ROTATABLE SHAFT MEANS COMPRISING A FLUID RESERVOIR, FIRST VALVE MEANS CONNECTED TO SAID FLUID RESERVOIR, MEANS FOR FEEDING FLUID FROM SAID FLUID RESERVOIR UNDER PRESSURE TO SAID FIRST VALVE MEANS, FLUID ACTUATED MOTOR MEANS OPERATIVELY CONNECTED TO SAID CHANGE-OVER CLUTCHES, CONDUIT MEANS FOR CONNECTING SAID FIRST VALVE MEANS TO SAID FLUID ACTUATED MOTOR MEANS, SAID FIRST VALVE MEANS BEING OPERABLE TO PASS FLUID FROM SAID RESERVOIR SELECTIVELY TO SAID MOTOR MEANS SECOND VALVE MEANS CONNECTED TO SAID CONDUIT MEANS AND ADAPTED TO INTERRUPT THE FLOW OF PRESSURIZED FLUID TO SAID MOTOR MEANS, BRAKE CONTROL MEANS CONNECTED TO SAID SECOND VALVE MEANS, AND MEANS FOR ACTUATING SAID SECOND VALVE MEANS IN RESPONSE TO THE OPERATION OF SAID BRAKE CONTROL MEANS.
References Cited (Backward Citations)
US2990925A
Cited
US3080026A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-08 | 1969-05-10 | 1969-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-08 | 1973-05-10 | 1973-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-08 | 1977-05-10 | 1977-11-09 | $7700.00 | Window Closed / Lapsed |