US3093159A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic control valve
Assignee: National Research Development Corp UK
•
Filing: 1959-07-20
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Granted: 1963-06-11
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Expires: 1979-07-20
Abstract
No abstract record available.
Inventors
- 👤 Royle Joseph Kenneth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:14
CPC Classifications
B; B23; B23Q; B23Q5/00; B23Q5/22; B23Q5/26; B23Q5/266
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
A PRESSURE CONTROL VALVE COMPRISING A VALVE BODY, A VALVE MEMBER MOVABLE WITHIN SAID VALVE BODY, SAID VALVE BODY HAVING AT LEAST ONE INLET FOR FLUID UNDER A FIRST HIGH PRESSURE AND AT LEAST ONE EXHAUST OUTLET FOR FLUID AT A SECOND LOWER PRESSURE, A PRESSURE TAKE OFF OUTLET FROM SAID VALVE, AND MEANS FOR VARYING THE PRESSURE AT SAID TAKE OFF OUTLET BETWEEN THE FIRST AND SECOND PRESSURES, SAID MEANS INCLUDING A RESTRICTED PATH PROVIDING RESISTANCE FOR FLUID FLOW BETWEEN SAID INLET AND EXHAUST OUTLET AND MEANS FOR SHIFTING SAID VALVE MEMBER TO VARY THE EFFECTIVE LENGTH OF SAID RESTRICTED PATH BETWEEN SAID INLET AND SAID TAKE OFF OUTLET THEREBY VARYING THE PROPORTION OF THE PRESSURE AT THE INLET APPEARING AT THE TAKE OFF OUTLET.
Claim 2
Dependent Claim
126 words
A PRESSURE CONTROL VALVE COMPRISING A VALVE BODY, A VALVE MEMBER MOVABLE WITHIN SAID VALVE BODY, SAID VALVE BODY HAVING AT LEAST ONE INLET FOR FLUID UNDER A FIRST HIGH PRESSURE AND AT LEAST ONE EXHAUST OUTLET FOR FLUID AT A SECOND LOWER PRESSURE, A PRESSURE TAKE OFF OUTLET FROM SAID VALVE, AND MEANS FOR VARYING THE PRESSURE AT SAID TAKE OFF OUTLET BETWEEN THE FIRST AND SECOND PRESSURES, SAID MEANS INCLUDING A RESTRICTED PATH PROVIDING RESISTANCE FOR FLUID FLOW BETWEEN SAID INLET AND EXHAUST OUTLET AND MEANS FOR SHIFTING SAID VALVE MEMBER TO VARY THE EFFECTIVE LENGTH OF SAID RESTRICTED PATH BETWEEN SAID INLET AND SAID TAKE OFF OUTLET THEREBY VARYING THE PROPORTION OF THE PRESSURE AT THE INLET APPEARING AT THE TAKE OFF OUTLET.
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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) | 1966-06-10 | 1966-12-10 | 1967-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-06-10 | 1970-12-10 | 1971-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-06-10 | 1974-12-10 | 1975-06-11 | $7700.00 | Window Closed / Lapsed |