US3381931A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fast release valve
Assignee: Weston Instruments Inc
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Filing: 1966-09-30
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Granted: 1968-05-07
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Expires: 1986-09-30
Abstract
No abstract record available.
Inventors
- 👤 Julius C Boonshaft
- 👤 Kenneth W Zeuner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:54
CPC Classifications
F; F15; F15B; F15B13/00; F15B13/02; F15B13/04; F15B13/042; F15B13/043; F15B13/0431; F16; F16K; F16K31/00; F16K31/12; F16K31/36; F16K31/40; F16K31/406; F16K31/408
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
A FAST RELEASE HYDRAULIC VALVE COMPRISING A WAFER SOLENOID HAVING A CERTAIN HOLDING FORCE WHEN CLOSED, A VALVE STEM CONNECTED TO AND MOVABLE BY SAID WAFER SOLENOID, A PLUNGER HEAD CONNECTED TO SAID VALVE STEM, A VALVE SEAT AGAINST WHICH SAID PLUNGER HEAD SELECTIVELY SEATS, A TRIGGER BIAS SPRING BETWEEN SAID PLUNGER HEAD AND SAID VALVE STEM, A CHANNEL FROM SAID VALVE SEAT COMMUNICATING TO A SOURCE OF HYDRAULIC FLUID UNDER PRESSURE, SAID VALVE BEING CLOSED WHEN SAID WAFER SOLENOID IS ENERGIZED AND CLOSED, SAID TRIGGER-BIASED SPRING BEING AT LEAST PARTIALLY COMPRESSED WHEN SAID VALVE IS CLOSED, THE SUM OF THE FORCE OF SAID TRIGGER BIAS SPRING BEING LESS THAN SAID HOLDING FORCE OF SAID WAFER SOLENOID WHEN SAID WAFER SOLENOID IS CLOSED.
Claim 2
Dependent Claim
123 words
A FAST RELEASE HYDRAULIC VALVE COMPRISING A WAFER SOLENOID HAVING A CERTAIN HOLDING FORCE WHEN CLOSED, A VALVE STEM CONNECTED TO AND MOVABLE BY SAID WAFER SOLENOID, A PLUNGER HEAD CONNECTED TO SAID VALVE STEM, A VALVE SEAT AGAINST WHICH SAID PLUNGER HEAD SELECTIVELY SEATS, A TRIGGER BIAS SPRING BETWEEN SAID PLUNGER HEAD AND SAID VALVE STEM, A CHANNEL FROM SAID VALVE SEAT COMMUNICATING TO A SOURCE OF HYDRAULIC FLUID UNDER PRESSURE, SAID VALVE BEING CLOSED WHEN SAID WAFER SOLENOID IS ENERGIZED AND CLOSED, SAID TRIGGER-BIASED SPRING BEING AT LEAST PARTIALLY COMPRESSED WHEN SAID VALVE IS CLOSED, THE SUM OF THE FORCE OF SAID TRIGGER BIAS SPRING BEING LESS THAN SAID HOLDING FORCE OF SAID WAFER SOLENOID WHEN SAID WAFER SOLENOID IS CLOSED.
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) | 1971-05-07 | 1971-11-06 | 1972-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-07 | 1975-11-06 | 1976-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-07 | 1979-11-06 | 1980-05-07 | $7700.00 | Window Closed / Lapsed |