US3168902A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Constant volume flow control valve
Assignee: RTX Corp
•
Filing: 1961-09-05
•
Granted: 1965-02-09
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Expires: 1981-09-05
Abstract
No abstract record available.
Inventors
- 👤 David R Pearl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:39
CPC Classifications
F; F02; F02C; F02C9/00; F02C9/26; F02C9/263; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7781; Y10T137/7784; Y10T137/7787; Y10T137/7788; Y10T137/7837; Y10T137/7869
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
A VALVE ADAPTED TO CONTROL THE FLOW OF FLUID AT A CONSTANT VALUE COMPRISING A HOUSING HAVING AN INLET AND OUTLET, A FIXED METERING ORIFICE DISPOSED BETWEEN THE INLET AND OUTLET, ADJUSTING MEANS INCLUDING A MOVABLE MEMBER ADAPTED TO MOVE IN THE VALVE FOR RESTRICTING FLUID FLOW FOR MAINTAINING THE PRESSURE DROP CROSS THE ORIFICE AT A CONSTANT VALUE, A CONTOURED PLUG EXTENDING THROUGH SAID ORIFICE AND CONNECTED TO SAID MOVABLE MEMBER AND MOVEABLE IN RESPONSE TO SAID ADJUSTING MEANS.
Claim 2
Dependent Claim
80 words
A VALVE ADAPTED TO CONTROL THE FLOW OF FLUID AT A CONSTANT VALUE COMPRISING A HOUSING HAVING AN INLET AND OUTLET, A FIXED METERING ORIFICE DISPOSED BETWEEN THE INLET AND OUTLET, ADJUSTING MEANS INCLUDING A MOVABLE MEMBER ADAPTED TO MOVE IN THE VALVE FOR RESTRICTING FLUID FLOW FOR MAINTAINING THE PRESSURE DROP CROSS THE ORIFICE AT A CONSTANT VALUE, A CONTOURED PLUG EXTENDING THROUGH SAID ORIFICE AND CONNECTED TO SAID MOVABLE MEMBER AND MOVEABLE IN RESPONSE TO SAID ADJUSTING MEANS.
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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) | 1968-02-09 | 1968-08-10 | 1969-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-02-09 | 1972-08-10 | 1973-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-02-09 | 1976-08-10 | 1977-02-09 | $7700.00 | Window Closed / Lapsed |