US3224461A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Propellant charging valve having plastic head construction
Assignee: Individual
•
Filing: 1961-09-14
•
Granted: 1965-12-21
•
Expires: 1981-09-14
Abstract
No abstract record available.
Inventors
- 👤 Frank L Kurek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:51
CPC Classifications
B; B65; B65D; B65D83/00; B65D83/14; B65D83/42; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7781; Y10T137/7835
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
IN A VALVE WHICH OPENS IN RESPONSE TO AN INCREASE IN UPSTREAM PRESSURE: A SEAT, A CYLINDRICAL BORE HAVING AN AXIS PERPENDICULAR TO SAID SEAT, A SINGLE TUBULAR PASSAGE OPENING OUT OF SAID BORE, THROUGH SUBSTANTIALLY THE CENTER OF SAID SEAT, A PISTON OF RESILIENT PLASTIC HAVING A GENERALLY CYLINDRICAL OUTER SURFACE SLIDABLY RECEIVED IN SAID BORE, A SURFACE ON ONE END OF SAID PISTON TO SEAL AGAINST SAID SEAT, A CONICAL SURFACE IN THE OTHER END OF SAID PISTON, A PISTON-HOLDING MEMBER BIASEDLY URGED AGAINST SAID PISTON, SAID PISTON-HOLDING MEMBER HAVING ONE END SURFACE THEREOF ENGAGED WITH SAID CONICAL SURFACE OF SAID PISTON, SAID END SURFACE BEING CONICAL, AND A PLURALITY OF CONICAL SLITS IN THE OUTER CYLINDRICAL WALL OF SAID
Claim 2
Dependent Claim
122 words
IN A VALVE WHICH OPENS IN RESPONSE TO AN INCREASE IN UPSTREAM PRESSURE: A SEAT, A CYLINDRICAL BORE HAVING AN AXIS PERPENDICULAR TO SAID SEAT, A SINGLE TUBULAR PASSAGE OPENING OUT OF SAID BORE, THROUGH SUBSTANTIALLY THE CENTER OF SAID SEAT, A PISTON OF RESILIENT PLASTIC HAVING A GENERALLY CYLINDRICAL OUTER SURFACE SLIDABLY RECEIVED IN SAID BORE, A SURFACE ON ONE END OF SAID PISTON TO SEAL AGAINST SAID SEAT, A CONICAL SURFACE IN THE OTHER END OF SAID PISTON, A PISTON-HOLDING MEMBER BIASEDLY URGED AGAINST SAID PISTON, SAID PISTON-HOLDING MEMBER HAVING ONE END SURFACE THEREOF ENGAGED WITH SAID CONICAL SURFACE OF SAID PISTON, SAID END SURFACE BEING CONICAL, AND A PLURALITY OF CONICAL SLITS IN THE OUTER CYLINDRICAL WALL OF SAID
References Cited (Backward Citations)
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Cited
GB387919A
Cited
US2462642A
Cited
US2616504A
Cited
US2697446A
Cited
US2973983A
Cited
US3108779A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-12-20 | 1969-06-21 | 1969-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-20 | 1973-06-21 | 1973-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-20 | 1977-06-21 | 1977-12-21 | $7700.00 | Window Closed / Lapsed |