US3223104A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electro-hydraulic servo valve
Assignee: Weston Hydraulics Ltd
•
Filing: 1962-10-26
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Granted: 1965-12-14
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Expires: 1982-10-26
Abstract
No abstract record available.
Inventors
- 👤 Robert M Cox
- 👤 Ray F Griswold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:48
CPC Classifications
F; F15; F15B; F15B13/00; F15B13/02; F15B13/04; F15B13/042; F15B13/043; F15B13/0438; Y; Y10; Y10T; Y10T137/00; Y10T137/2278; Y10T137/2409; Y10T137/8593; Y10T137/86493; Y10T137/86574; Y10T137/86582; Y10T137/8659; Y10T137/86598
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
IN A TRANSFER VALVE, AN ELECTRO RESPONSIVE TORQUE. MOTOR, AN ELONGATED FLAPPER OPERATED BY SAID TORQUE MOTOR, A BODY MEANS DEFINING AN ELONGATED OPENING IN SAID BODY, SHUTTLE MEANS IN SAID ELONGATED OPENING ADAPTED FOR RECIPROCABLE MOVEMENT THEREIN, A FLEXIBLE SEAL SEALABLY CONNECTED TO SAID FLAPPER AND SAID BODY AND DISPOSED BETWEEN SAID TORQUE MOTOR AND SAID SHUTTLE MEANS EFFECTIVE TO ISLOATE SAID TORQUE MOTOR FROM FLUID, MECHANICAL MEANS OPERATED BY MOVEMENT OF SAID SHUTTLE MEANS TO EXERT A FEEDBACK FORCE ON SAID FLAPPER AT A POINT INTERMEDIATE THE ENDS THEREOF, A PAIR OF NOZZLE ADAPTED FOR FLUID FLOW THERETHROUGH RESPECTIVELY POSITIONED AT OPPOSITE SIDES OF THAT EXTERMITY OF SAID ELONGATED FLAPPER WHICH IS SPACED FROM SAID TORQUE MOTOR AND POSITIONED IMMEDI-
Claim 2
Dependent Claim
122 words
IN A TRANSFER VALVE, AN ELECTRO RESPONSIVE TORQUE. MOTOR, AN ELONGATED FLAPPER OPERATED BY SAID TORQUE MOTOR, A BODY MEANS DEFINING AN ELONGATED OPENING IN SAID BODY, SHUTTLE MEANS IN SAID ELONGATED OPENING ADAPTED FOR RECIPROCABLE MOVEMENT THEREIN, A FLEXIBLE SEAL SEALABLY CONNECTED TO SAID FLAPPER AND SAID BODY AND DISPOSED BETWEEN SAID TORQUE MOTOR AND SAID SHUTTLE MEANS EFFECTIVE TO ISLOATE SAID TORQUE MOTOR FROM FLUID, MECHANICAL MEANS OPERATED BY MOVEMENT OF SAID SHUTTLE MEANS TO EXERT A FEEDBACK FORCE ON SAID FLAPPER AT A POINT INTERMEDIATE THE ENDS THEREOF, A PAIR OF NOZZLE ADAPTED FOR FLUID FLOW THERETHROUGH RESPECTIVELY POSITIONED AT OPPOSITE SIDES OF THAT EXTERMITY OF SAID ELONGATED FLAPPER WHICH IS SPACED FROM SAID TORQUE MOTOR AND POSITIONED IMMEDI-
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) | 1968-12-13 | 1969-06-14 | 1969-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-13 | 1973-06-14 | 1973-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-13 | 1977-06-14 | 1977-12-14 | $7700.00 | Window Closed / Lapsed |