US3176593A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure responsive servo valve
Assignee: Individual
•
Filing: 1962-06-21
•
Granted: 1965-04-06
•
Expires: 1982-06-21
Abstract
No abstract record available.
Inventors
- 👤 Robert J Bernstein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:56
CPC Classifications
F; F15; F15B; F15B13/00; F15B13/02; F15B13/04; F15B13/042; F15B13/043; F15B13/0438; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86574; Y10T137/86582; Y10T137/8659; Y10T137/86598; Y10T137/86606; Y10T137/86622; Y10T137/8663
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
A FLUID PRESSURE SERVO VALVE COMPRISING IN COMBINATION, A HOUSING HAVING FLUID PASSAGEWAYS FOR CONNECTION WITH PRESSURE RESPONSIVE MEANS, A FLOW CONTROL MEMBER ROTATABLY MOUNTED ON SAID HOUSING FORMING A PAIR OF SEPARATED FLUID CHAMBERS THEREWITH AND HAVING MEANS CONTROLLING THE FLUID FLOW THROUGH SAID PASSAGEWAYS, SEPARATE PASSAGE MEANS FORMED IN SAID HOUSING AFFORDING FLUID FLOW THROUGH SAID CHAMBERS, AND CONDITION, RESPONSIVE MEANS IN SAID PASSAGE MEANS FOR VARYING THE PRESSURE DIFFERENTIAL IN SAID CHAMBERS TO THEREBY CAUSE SAID FLOW CONTROL MEMBER TO VARY ACCORDINGLY THE FLUID FLOW THROUGH SAID PASSAGEWAYS, SAID FLOW CONTROL MEMBER BEING FORMED WITH A FLOW CONTROL OPENING FOR EACH OF SAID PASSAGE MEANS TO COOPERATE RESPECTIVELY THEREWITH TO INVERSELY VARY FLUID FLOW TO SAID CHAMBERS UPON ROTATION OF SAID FLOW CONTROL MEMBER.
Claim 2
Dependent Claim
127 words
A FLUID PRESSURE SERVO VALVE COMPRISING IN COMBINATION, A HOUSING HAVING FLUID PASSAGEWAYS FOR CONNECTION WITH PRESSURE RESPONSIVE MEANS, A FLOW CONTROL MEMBER ROTATABLY MOUNTED ON SAID HOUSING FORMING A PAIR OF SEPARATED FLUID CHAMBERS THEREWITH AND HAVING MEANS CONTROLLING THE FLUID FLOW THROUGH SAID PASSAGEWAYS, SEPARATE PASSAGE MEANS FORMED IN SAID HOUSING AFFORDING FLUID FLOW THROUGH SAID CHAMBERS, AND CONDITION, RESPONSIVE MEANS IN SAID PASSAGE MEANS FOR VARYING THE PRESSURE DIFFERENTIAL IN SAID CHAMBERS TO THEREBY CAUSE SAID FLOW CONTROL MEMBER TO VARY ACCORDINGLY THE FLUID FLOW THROUGH SAID PASSAGEWAYS, SAID FLOW CONTROL MEMBER BEING FORMED WITH A FLOW CONTROL OPENING FOR EACH OF SAID PASSAGE MEANS TO COOPERATE RESPECTIVELY THEREWITH TO INVERSELY VARY FLUID FLOW TO SAID CHAMBERS UPON ROTATION OF SAID FLOW CONTROL MEMBER.
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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) | 1968-04-05 | 1968-10-05 | 1969-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-05 | 1972-10-05 | 1973-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-05 | 1976-10-05 | 1977-04-06 | $7700.00 | Window Closed / Lapsed |