US3077898A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid relief valve
Assignee: RACINE HYDRAULICS AND MACHINERY Inc
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Filing: 1959-01-28
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Granted: 1963-02-19
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Expires: 1979-01-28
Abstract
No abstract record available.
Inventors
- 👤 Robert E Raymond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:32
CPC Classifications
F; F16; F16K; F16K17/00; F16K17/02; F16K17/04; F16K17/10; F16K17/105; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7758; Y10T137/7762; Y10T137/7764; Y10T137/7766; Y10T137/7781; Y10T137/7835
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
157 words
A FLUID RELIEF VALVE COMPRISING, A VALVE BODY HAVING A VALVE CHAMBER, A FLUID INLET PASSAGE AND A FLUID OUTLET PASSAGE IN COMMUNICATION WITH SAID CHAMBER, A VALVE MEMBER IN SAID CHAMBER FOR BLOCKING COMMUNICATION BETWEEN THE INLET PASSAGE AND THE OUTLET PASSAGE, A PISTON CONNECTED TO SAID VALVE MEMBER WITH ONE FACE THEREOF SUBJECT TO THE PRESSURE OF FLUID IN SAID INLET PASSAGE, A CHAMBER FOR SAID PISTON IN RESTRICTED FLUID COMMUNICATION WITH SAID INLET PASSAGE, SAID PISTON CHAMBER BEING OF A SIZE TO HOLD SUFFICIENT FLUID WHEREBY FLUID CONTAINED THEREIN FUNCTIONS AS A FLUID SPRING ON SAID PISTON TO URGE THE VALVE MEMBER TOWARD A BLOCKING POSITION RELATIVE TO SAID PASSAGES AND YIELDABLE UPON AN EXCESSIVE RATE OF PRESSURE CHANGE, A PILOT VALVE FOR DRAINING FLUID FROM SAID PISTON CHAMBER, A FLOW RESTRICTION BETWEEN THE PISTON CHAMBER AND THE PILOT VALVE TO REJECT PRESSURE PULSATIONS IN THE FLUID SPRING, AND A FLUID ACCUMULATOR POSITIONED EX-
Claim 2
Dependent Claim
157 words
A FLUID RELIEF VALVE COMPRISING, A VALVE BODY HAVING A VALVE CHAMBER, A FLUID INLET PASSAGE AND A FLUID OUTLET PASSAGE IN COMMUNICATION WITH SAID CHAMBER, A VALVE MEMBER IN SAID CHAMBER FOR BLOCKING COMMUNICATION BETWEEN THE INLET PASSAGE AND THE OUTLET PASSAGE, A PISTON CONNECTED TO SAID VALVE MEMBER WITH ONE FACE THEREOF SUBJECT TO THE PRESSURE OF FLUID IN SAID INLET PASSAGE, A CHAMBER FOR SAID PISTON IN RESTRICTED FLUID COMMUNICATION WITH SAID INLET PASSAGE, SAID PISTON CHAMBER BEING OF A SIZE TO HOLD SUFFICIENT FLUID WHEREBY FLUID CONTAINED THEREIN FUNCTIONS AS A FLUID SPRING ON SAID PISTON TO URGE THE VALVE MEMBER TOWARD A BLOCKING POSITION RELATIVE TO SAID PASSAGES AND YIELDABLE UPON AN EXCESSIVE RATE OF PRESSURE CHANGE, A PILOT VALVE FOR DRAINING FLUID FROM SAID PISTON CHAMBER, A FLOW RESTRICTION BETWEEN THE PISTON CHAMBER AND THE PILOT VALVE TO REJECT PRESSURE PULSATIONS IN THE FLUID SPRING, AND A FLUID ACCUMULATOR POSITIONED EX-
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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) | 1966-02-18 | 1966-08-20 | 1967-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-02-18 | 1970-08-20 | 1971-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-02-18 | 1974-08-20 | 1975-02-19 | $7700.00 | Window Closed / Lapsed |