US3250290A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Servo operated valves
Assignee: Koehler Dayton Inc
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Filing: 1963-04-10
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Granted: 1966-05-10
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Expires: 1983-04-10
Abstract
No abstract record available.
Inventors
- 👤 Richard J Becht
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:43
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/12; F16K31/18; F16K31/20; F16K31/24; G; G05; G05D; G05D9/00; G05D9/04; Y; Y10; Y10T; Y10T137/00; Y10T137/7287; Y10T137/7303; Y10T137/7358; Y10T137/7368; Y10T137/7371; Y10T137/7374; Y10T137/8593; Y10T137/86928
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
154 words
A SERVO OPERATED VALVE DEVICE COMPRISING A BODY ADAPTED TO MOUNTING ON A TANK AND HAVING MEANS FORMING A MAIN FLUID PASSAGE INCLUDING A VALVE CHAMBER, MEANS FORMING INLET AND OUTLET PORTS AT OPPOSITE SIDES OF SAID VALVE CHAMBER, SAID OUTLET PORT BEING ARRANGED FOR CONNECTION TO THE TANK, A PAIR OF FLUID PRESSURE OPERATED INLET AND OUTLET VALVE MEMBERS MOUNTED IN SAID CHAMBER, SAID INLET VALVE MEMBER CONTROLLING THE FLOW OF FLUID THROUGH SAID INLET PORT AND SAID VALVE CONTROLLING THE FLOW OF FLUID THROUGH SAID OUTLET PORT, SEPARATE SERVO MOTORS EACH INCLUDING A CONTROL CHAMBER ASSOCIATED WITH RESPECTIVE ONES OF SAID VALVES, SEPARATE FIRST AND SECOND CONTROL DUCTS LEADING FROM SAID CONTROL CHAMBERS, FIRST AND SECOND PILOT VALVES CONTROLLING THE PASSAGE OF FLUID FROM SAID CHAMBERS THROUGH SAID CONTROL DUCTS, PRESSURE FLUID SUPPLY DUCTS CONNECTING EACH OF SAID CONTROL CHAMBERS TO SAID INLET PORT FOR CLOSING EACH OF SAID VALVE MEMBERS INDE-
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) | 1969-05-09 | 1969-11-08 | 1970-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-09 | 1973-11-08 | 1974-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-09 | 1977-11-08 | 1978-05-10 | $7700.00 | Window Closed / Lapsed |