US3336933A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic valve system including a pilot valve and a main unloader valve
Assignee: MERCIER JACQUES H 180 GLENBROOK ROAD STAMFORD
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Filing: 1966-03-14
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Granted: 1967-08-22
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Expires: 1986-03-14
Abstract
No abstract record available.
Inventors
- 👤 Mercier Jean
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:03
CPC Classifications
F; F15; F15B; F15B1/00; F15B1/02; F15B1/027; G; G05; G05D; G05D16/00; G05D16/04; G05D16/10; G05D16/101; G05D16/14; G05D16/16; G05D16/166; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2574; Y10T137/2605; Y10T137/2612; Y10T137/2615; Y10T137/2622; Y10T137/2625; Y10T137/7722; Y10T137/7781; Y10T137/7784; Y10T137/7834
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
130 words
A VALVE SYSTEM COMPRISING A MAIN UNLOADER VALVE, AND A PILOT VALVE, SAID MAIN VALVE HAVING A HOUSING, WITH A PISTON SLIDABLE THEREIN, SAID MAIN VALVE HAVING A PRESSURE INLET PORT, A PRESSURE OUTLET PORT AND A DISCHARGE PORT, RESILIENT MEANS NORMALLY URGING SAID PISTON IN DIRECTION TO CONNECT SAID INLET AND OUTLET PORTS AND TO CLOSE SAID DISCHARGE PORT, A PRESSURE CHAMBER ON THE SIDE OF THE PISTON OPPOSED TO SAID RESILIENT MEANS, SAID PILOT VALVE COMPRISING A HOUSING HAVING A PISTON SLIDABLE THEREIN, A PRESSURE CHAMBER IN SAID PILOT VALVE HAVING A PORT IN COMMUNICATION WITH THE OUTLET PORT OF SAID MAIN VALVE, A VALVE CONTROLLING SAID PRESSURE CHAMBER PORT, MEANS PROVIDING COMMUNICATION BETWEEN SAID PRESSURE CHAMBER OF SAID PILOT VAVLE AND THE PREESURE CHAMBER OF SAID UNLOADER
Claim 2
Dependent Claim
130 words
A VALVE SYSTEM COMPRISING A MAIN UNLOADER VALVE, AND A PILOT VALVE, SAID MAIN VALVE HAVING A HOUSING, WITH A PISTON SLIDABLE THEREIN, SAID MAIN VALVE HAVING A PRESSURE INLET PORT, A PRESSURE OUTLET PORT AND A DISCHARGE PORT, RESILIENT MEANS NORMALLY URGING SAID PISTON IN DIRECTION TO CONNECT SAID INLET AND OUTLET PORTS AND TO CLOSE SAID DISCHARGE PORT, A PRESSURE CHAMBER ON THE SIDE OF THE PISTON OPPOSED TO SAID RESILIENT MEANS, SAID PILOT VALVE COMPRISING A HOUSING HAVING A PISTON SLIDABLE THEREIN, A PRESSURE CHAMBER IN SAID PILOT VALVE HAVING A PORT IN COMMUNICATION WITH THE OUTLET PORT OF SAID MAIN VALVE, A VALVE CONTROLLING SAID PRESSURE CHAMBER PORT, MEANS PROVIDING COMMUNICATION BETWEEN SAID PRESSURE CHAMBER OF SAID PILOT VAVLE AND THE PREESURE CHAMBER OF SAID UNLOADER
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-08-21 | 1971-02-20 | 1971-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-21 | 1975-02-20 | 1975-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-21 | 1979-02-20 | 1979-08-22 | $7700.00 | Window Closed / Lapsed |