US3245424A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Servo valve
Assignee: Individual
•
Filing: 1963-05-31
•
Granted: 1966-04-12
•
Expires: 1983-05-31
Abstract
No abstract record available.
Inventors
- 👤 Olsen Zenny
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:03
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; Y10T137/86509; Y10T137/86517; Y10T137/86533; Y10T137/86541; Y10T137/86574; Y10T137/86582; Y10T137/8659; Y10T137/86614
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
179 words
A SERVO VALVE, COMPRISING: PILOT VALVE MEANS INCLUDING A VARIABLE PRESSURE PILOT CHAMBER HAVING AN INPUT ORIFICE FOR THE FLOW OF FLUID UNDER PRESSURE AND AN OUTPUT FIXED ORIFICE FOR PROVIDING A CONSTANT PRESSURE DROP; MOTOR MEANS HAVING A CANTILEVERED MEMBER FOR VARYING THE FLOW OF SAID FLUID THROUGH SAID INPUT ORIFICE TO VARY THE PRESSURE IN SAID PILOT CHAMBER IN RESPONSE TO AN INPUT SIGNAL; CONTROL VALVE MEANS INCLUDING A CONTROL CYLINDER COUPLED TO A SOURCE OF FLUID UNDER PRESSURE AND HAVING OUTPUT CONTROL PORTS; A COANTROL PISTON SLIDABLY MOUNTED IN SAID CONTROL CYLINDER FOR CONTROLLING FLUID FLOW IN SAID OUTPUT COANTROL PORTS IN ACCORDANCE WITH THE RELATIVE POSITION OF SAID CONTROL PISTON AND SAID CONTROL CYLINDER, SAID CONTROL PISTON BEING COUPLED TO SAID PILOT CHAMBER; FOR MOVEMENT IN ACCORDANCE WITH THE PRESSURE THEREIN; AND FEED-BACK MEANS COUPLING SAID CONTROL PISTON AND SAID CANTILEVER MEMBER WHEREBY MOTION OF SAID CANTILEVER MEMBER SO VARIES THE PRESSURE IN SAID PILOT CHAMBER AS TO DISPLACE SAID CONTROL PISTON IN A DIRECTION TENDING TO RESTORE SAID CANTILEVER MEMBER IN A NULL POSITION.
Claim 2
Dependent Claim
179 words
A SERVO VALVE, COMPRISING: PILOT VALVE MEANS INCLUDING A VARIABLE PRESSURE PILOT CHAMBER HAVING AN INPUT ORIFICE FOR THE FLOW OF FLUID UNDER PRESSURE AND AN OUTPUT FIXED ORIFICE FOR PROVIDING A CONSTANT PRESSURE DROP; MOTOR MEANS HAVING A CANTILEVERED MEMBER FOR VARYING THE FLOW OF SAID FLUID THROUGH SAID INPUT ORIFICE TO VARY THE PRESSURE IN SAID PILOT CHAMBER IN RESPONSE TO AN INPUT SIGNAL; CONTROL VALVE MEANS INCLUDING A CONTROL CYLINDER COUPLED TO A SOURCE OF FLUID UNDER PRESSURE AND HAVING OUTPUT CONTROL PORTS; A COANTROL PISTON SLIDABLY MOUNTED IN SAID CONTROL CYLINDER FOR CONTROLLING FLUID FLOW IN SAID OUTPUT COANTROL PORTS IN ACCORDANCE WITH THE RELATIVE POSITION OF SAID CONTROL PISTON AND SAID CONTROL CYLINDER, SAID CONTROL PISTON BEING COUPLED TO SAID PILOT CHAMBER; FOR MOVEMENT IN ACCORDANCE WITH THE PRESSURE THEREIN; AND FEED-BACK MEANS COUPLING SAID CONTROL PISTON AND SAID CANTILEVER MEMBER WHEREBY MOTION OF SAID CANTILEVER MEMBER SO VARIES THE PRESSURE IN SAID PILOT CHAMBER AS TO DISPLACE SAID CONTROL PISTON IN A DIRECTION TENDING TO RESTORE SAID CANTILEVER MEMBER IN A NULL POSITION.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-04-11 | 1969-10-11 | 1970-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-11 | 1973-10-11 | 1974-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-11 | 1977-10-11 | 1978-04-12 | $7700.00 | Window Closed / Lapsed |