US3175500A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electro-hydraulic actuator
Assignee: Fisher Governor Co
•
Filing: 1962-05-14
•
Granted: 1965-03-30
•
Expires: 1982-05-14
Abstract
No abstract record available.
Inventors
- 👤 Ralph W Zeigler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:53
CPC Classifications
F; F15; F15B; F15B15/00; F15B15/18; F04; F04B; F04B17/00; F04B17/03; F04B17/04; F04B17/046; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86919
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
FOR USE WITH CONTROL MECHANISM INCLUDING AN ELECTROHYDRAULIC ACTUATOR COMPRISING A POWER MEMBER ADAPTED TO BE CONNECTED TO MOVE A CONTROL MEMBER AND MEANS FOR BIASING THE POWER MEMBER IN ONE DIRECTION, THE IMPROVEMENT COMPRISING VIBRATOR PUMP MEANS FOR ACTUATING THE POWER MEMBER IN A SECOND DIRECTION, SAID VIBRATOR PUMP MEANS COMPRISING A HOUSING HAVING AN OUTLET AND A LONGITUDINAL BORE THEREIN, AN ELONGATED RECIPROCABLE PLUNGER MOVABLE IN SAID LONGITUDINAL BORE AND HAVING A PASSAGE THERETHROUGH, A CORE DEFINING AN INLET OPENING INTO SAID HOUSING, SAID INLET OPENING COMMUNICATING WITH SAID LONGITUDINAL BORE AND SAID PASSAGE, A COIL ADAPTED TO
Claim 2
Dependent Claim
100 words
FOR USE WITH CONTROL MECHANISM INCLUDING AN ELECTROHYDRAULIC ACTUATOR COMPRISING A POWER MEMBER ADAPTED TO BE CONNECTED TO MOVE A CONTROL MEMBER AND MEANS FOR BIASING THE POWER MEMBER IN ONE DIRECTION, THE IMPROVEMENT COMPRISING VIBRATOR PUMP MEANS FOR ACTUATING THE POWER MEMBER IN A SECOND DIRECTION, SAID VIBRATOR PUMP MEANS COMPRISING A HOUSING HAVING AN OUTLET AND A LONGITUDINAL BORE THEREIN, AN ELONGATED RECIPROCABLE PLUNGER MOVABLE IN SAID LONGITUDINAL BORE AND HAVING A PASSAGE THERETHROUGH, A CORE DEFINING AN INLET OPENING INTO SAID HOUSING, SAID INLET OPENING COMMUNICATING WITH SAID LONGITUDINAL BORE AND SAID PASSAGE, A COIL ADAPTED TO
References Cited (Backward Citations)
US1150800A
Cited
US2330739A
Cited
US2752453A
Cited
US2948118A
Cited
US2942581A
Cited
US3120103A
Cited
US3018735A
Cited
US3069855A
Cited
US3113523A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-03-29 | 1968-09-28 | 1969-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-29 | 1972-09-28 | 1973-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-29 | 1976-09-28 | 1977-03-30 | $7700.00 | Window Closed / Lapsed |