US3090394A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure control valves of the centrifugal type
Assignee: Austin Motor Co Ltd
•
Filing: 1960-07-06
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Granted: 1963-05-21
•
Expires: 1980-07-06
Abstract
No abstract record available.
Inventors
- 👤 Graham D Page
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:13
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/44; F16K17/00; F16K17/02; F16K17/04; F16K17/0406; F16K17/044; G; G05; G05D; G05D13/00; G05D13/08; G05D13/10; Y; Y10; Y10T; Y10T137/00; Y10T137/0971; Y10T137/108; Y10T137/1135; Y10T137/7722; Y10T137/7837; Y10T137/7876; Y10T137/7877; Y10T137/7904; Y10T137/7905
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
IN A CENTRIFUGAL TYPE FLUID PRESSURE RELIEF VALVE OF THE TYPE IN WHICH ROTATING WEIGHT MEANS ACT UPON A VARIABLE RATE SPRING SUCH THAT ITS DEFLECTION, DUE TO THE CENTRIFUGAL FORCE ON SAID WEIGHT MEANS, IS PROPORTIONAL TO THE ROTATIONAL SPEED OF THE LATTER, THE IMPROVEMENT WHICH COMPRISES A VALVE CLOSURE ELEMENT NORMALLY SUB JECTED TO FLUID PRESSURE FOR MOVING SAID ELEMENT TOWARD OPEN POSITION, AND MEANS FOR MOVING SAID ELEMENT TOWARD CLOSED POSITION WITH A FORCE SUBSTANTIALLY DIRECTLY PROPORTIONAL TO THE ROTATIONAL SPEED OF SAID WEIGHT MEANS, COMPRISING A CONNECTION BETWEEN THE WRIGHT MEANS AND THE VALVE CLOSURE ELEMENT, SAID CONNECTION INCLUDING A SECOND SPRING.
Claim 2
Dependent Claim
106 words
IN A CENTRIFUGAL TYPE FLUID PRESSURE RELIEF VALVE OF THE TYPE IN WHICH ROTATING WEIGHT MEANS ACT UPON A VARIABLE RATE SPRING SUCH THAT ITS DEFLECTION, DUE TO THE CENTRIFUGAL FORCE ON SAID WEIGHT MEANS, IS PROPORTIONAL TO THE ROTATIONAL SPEED OF THE LATTER, THE IMPROVEMENT WHICH COMPRISES A VALVE CLOSURE ELEMENT NORMALLY SUB JECTED TO FLUID PRESSURE FOR MOVING SAID ELEMENT TOWARD OPEN POSITION, AND MEANS FOR MOVING SAID ELEMENT TOWARD CLOSED POSITION WITH A FORCE SUBSTANTIALLY DIRECTLY PROPORTIONAL TO THE ROTATIONAL SPEED OF SAID WEIGHT MEANS, COMPRISING A CONNECTION BETWEEN THE WRIGHT MEANS AND THE VALVE CLOSURE ELEMENT, SAID CONNECTION INCLUDING A SECOND SPRING.
References Cited (Backward Citations)
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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) | 1966-05-20 | 1966-11-19 | 1967-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-05-20 | 1970-11-19 | 1971-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-05-20 | 1974-11-19 | 1975-05-21 | $7700.00 | Window Closed / Lapsed |