Patent US3122972A successfully refreshed from Google Patents.
US3122972A
Expired / Lapsed
US
⏱️ 0.0 years remaining
rasmussen
Assignee: —
•
Filing: —
•
Granted: 1964-03-03
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Expires: 1981-03-03
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:54
CPC Classifications
F; F15; F15B; F15B9/00; F15B9/02; F15B9/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
144 words
IN A HYDRAULIC SERVOMOTOR INCLUDING A HOUSING: A MANUAL INPUT MEANS; MEANS FOR POSITIONING AND LATCHING SAID MANUAL INPUT MEANS TO SAID HOUSING; AN ELECTROHYDRAULIC TRANSDUCER MEANS; AN AUXILIARY ACTUATOR; MEANS FOR POSITIONING AND HOLDING SAID AUXILIARY ACTUATOR RELATIVE TO SAID HOUSING; CONTROL VALVE MEANS; AND PARALLELOGRAM LINKAGE MEANS CONNECTING SAID MANUAL INPUT MEANS, SAID AUXILIARY ACTUATOR, AND SAID CONTROL VALVE MEANS SO THAT SAID CONTROL VALVE MEANS IS OPERABLE AS A RESULTANT OF THE MOVEMENT OF SAID MANUAL INPUT MEMBER AND SAID AUXILIARY ACTUATOR; SAID AUXILIARY ACTUATOR BEING OPERABLE IN RESPONSE TO SIGNALS FROM SAID ELECTROHYDRAULIC TRANSDUCER MEANS; A MAIN ACTUATOR; SAID SERVOMOTOR HOUSING BEING POSITIONED RELATIVE TO SAID MAIN ACTUATOR IN RESPONSE TO SIGNALS FROM SAID CONTROL VALVE MEANS TO SAID MAIN ACTUATOR; AND FEEDBACK MEANS, SAID FEEDBACK MEANS BEING OPERABLE IN RESPONSE TO THE RELATIVE POSITION OF ONE OF SAID ACTUATORS.
Claim 2
Dependent Claim
144 words
IN A HYDRAULIC SERVOMOTOR INCLUDING A HOUSING: A MANUAL INPUT MEANS; MEANS FOR POSITIONING AND LATCHING SAID MANUAL INPUT MEANS TO SAID HOUSING; AN ELECTROHYDRAULIC TRANSDUCER MEANS; AN AUXILIARY ACTUATOR; MEANS FOR POSITIONING AND HOLDING SAID AUXILIARY ACTUATOR RELATIVE TO SAID HOUSING; CONTROL VALVE MEANS; AND PARALLELOGRAM LINKAGE MEANS CONNECTING SAID MANUAL INPUT MEANS, SAID AUXILIARY ACTUATOR, AND SAID CONTROL VALVE MEANS SO THAT SAID CONTROL VALVE MEANS IS OPERABLE AS A RESULTANT OF THE MOVEMENT OF SAID MANUAL INPUT MEMBER AND SAID AUXILIARY ACTUATOR; SAID AUXILIARY ACTUATOR BEING OPERABLE IN RESPONSE TO SIGNALS FROM SAID ELECTROHYDRAULIC TRANSDUCER MEANS; A MAIN ACTUATOR; SAID SERVOMOTOR HOUSING BEING POSITIONED RELATIVE TO SAID MAIN ACTUATOR IN RESPONSE TO SIGNALS FROM SAID CONTROL VALVE MEANS TO SAID MAIN ACTUATOR; AND FEEDBACK MEANS, SAID FEEDBACK MEANS BEING OPERABLE IN RESPONSE TO THE RELATIVE POSITION OF ONE OF SAID ACTUATORS.
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) | 1967-03-03 | 1967-09-02 | 1968-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-03-03 | 1971-09-02 | 1972-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-03-03 | 1975-09-02 | 1976-03-03 | $7700.00 | Window Closed / Lapsed |