US3606900A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety valve
Assignee: Rucker Co
•
Filing: 1969-09-22
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Granted: 1971-09-21
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Expires: 1989-09-22
Abstract
Abstract THE APPLICATION DISCLOSES A DUAL SAFETY VALVE FOR THE FUEL SYSTEMS OF AIRCRAFT OR THE LIKE IN WHICH A PAIR OF WOUND CLOCK SPRING ACTUATORS ENCASED IN BOOTS AND LOCATED IN FUEL PASSAGES ARE INTERCONNECTED BY MEANS NORMALLY HOLDING THE SPRINGS WOUND BUT SUBJECT TO RELEASING THE SPRINGS AND PERMITTING THEM TO UNWIND AND EXPANDTHEIR COVERING BOOTS AND THEREBY CLOSE THE FLUID PASSAGES IN WHICH THEY ARE LOCATED WHEN THE INTERCONNECTING MEANS ARE SUBJECTED TO UNDER EXTERNAL FORCE.
Inventors
- 👤 Wolfgang Wunderlich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 02:46
CPC Classifications
F; F16; F16K; F16K17/00; Y; Y10; Y10T; Y10T137/00; Y10T137/1624; Y10T137/1632; Y10T137/1654; Y10T137/1662; Y10T137/8593; Y10T137/87917; Y10T137/87925
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-20 | 1975-03-22 | 1975-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-20 | 1979-03-22 | 1979-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-20 | 1983-03-22 | 1983-09-21 | $7700.00 | Window Closed / Lapsed |