US3414008A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure operated valve
Assignee: Anderson Greenwood and Co
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Filing: 1966-09-15
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Granted: 1968-12-03
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Expires: 1986-09-15
Abstract
No abstract record available.
Inventors
- 👤 Marvin H Greenwood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:14
CPC Classifications
F; F16; F16K; F16K17/00; F16K17/02; F16K17/04; F16K17/10; F16K17/105; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2544; Y10T137/7722; Y10T137/7758; Y10T137/7762; Y10T137/7769
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
143 words
PILOT VALVE ASSEMBLY COMPRISING, A BODY, SAID BODY DEFINING AN INLET PORT, A CONTROL PORT, AN OUTLEAT PORT, A FIRST VALVE SEAT BETWEEN SAID INLET PORT AND SAID CONTROL PORT AND A SECOND VALVE SEAT BETWEEN SAID CONTROL PORT AND SAID OUTLET PORT, A PILOT VALVE MOVABLY POSITIONED WITHIN SAID BODY AND ADAPTED TO SEAT ON SAID SECOND VALVE SEAT, A SECOND VALVE MOVABLY POSITIONED WITHIN SAID BODY AND ADAPTED TO SEAT ON SAID FIRST VALVE SEAT, MEANS CONNECTING SAID PILOT VALVE AND SAID SECOND VALVE TO HOLD SAID SECOND VALVE UNSEATED WHEN SAID PILOT VALVE IS SEATED, MEANS EXERTING A FORCE ON SAID PILOT VALVE TO BIAS SAID PILOT VALVE TOWARD SEATED POSITION, AND BLOWDOWN CONTROL MEANS EXERTING A FORCE ON SAID PILOT VALVE ONLY WHEN THE PILOT VALVE IS AT LEAST PARTICULARLY UNSEATED TO BIAS SAID PILOT VALVE TOWARD SEATED POSITION.
Claim 2
Dependent Claim
143 words
PILOT VALVE ASSEMBLY COMPRISING, A BODY, SAID BODY DEFINING AN INLET PORT, A CONTROL PORT, AN OUTLEAT PORT, A FIRST VALVE SEAT BETWEEN SAID INLET PORT AND SAID CONTROL PORT AND A SECOND VALVE SEAT BETWEEN SAID CONTROL PORT AND SAID OUTLET PORT, A PILOT VALVE MOVABLY POSITIONED WITHIN SAID BODY AND ADAPTED TO SEAT ON SAID SECOND VALVE SEAT, A SECOND VALVE MOVABLY POSITIONED WITHIN SAID BODY AND ADAPTED TO SEAT ON SAID FIRST VALVE SEAT, MEANS CONNECTING SAID PILOT VALVE AND SAID SECOND VALVE TO HOLD SAID SECOND VALVE UNSEATED WHEN SAID PILOT VALVE IS SEATED, MEANS EXERTING A FORCE ON SAID PILOT VALVE TO BIAS SAID PILOT VALVE TOWARD SEATED POSITION, AND BLOWDOWN CONTROL MEANS EXERTING A FORCE ON SAID PILOT VALVE ONLY WHEN THE PILOT VALVE IS AT LEAST PARTICULARLY UNSEATED TO BIAS SAID PILOT VALVE TOWARD SEATED POSITION.
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) | 1971-12-03 | 1972-06-03 | 1972-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-03 | 1976-06-03 | 1976-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-03 | 1980-06-03 | 1980-12-03 | $7700.00 | Window Closed / Lapsed |