US3156259A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Relief valve
Assignee: Kralinator Filters Ltd
•
Filing: 1962-03-19
•
Granted: 1964-11-10
•
Expires: 1982-03-19
Abstract
No abstract record available.
Inventors
- 👤 Otakar R Havelka
- 👤 Kampf Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:42
CPC Classifications
F; F16; F16K; F16K17/00; F16K17/02; F16K17/04; B; B01; B01D; B01D35/00; B01D35/14; B01D35/147; F16K17/0413; Y; Y10; Y10S; Y10S55/00; Y10S55/19; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7859; Y10T137/7861; Y10T137/7862; Y10T137/7865; Y10T137/7904; Y10T137/7922; Y10T137/7929; Y10T137/7935; Y10T137/7938
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
A RELIEF VALVE COMPRISING A PLASTIC VALVE BODY HAVING A PLURALITY OF PORTS, A VALVE PLATE, SAID VALVE BODY HAVING A VALVE SEAT AGAINST WHICH SAID PLATE IS ADAPTED TO CLOSE AND HAVING SAID PORTS OPENING THROUGH SAID SEAT AND MEANS FOR URGING SAID VALVE PLATE TO CLOSE SAID PORTS COMPRISING A PAIR OF RESILIENT ARMS INTEGRAL WITH SAID VALVE BODY SAID ARMS HAVING HOOKED ENDS AND A COIL COMPRESSION SPRING BEARING AGAINST SAID VALVE PLATE AND SUPPORTED BY SAID HOOKED ENDS.
Claim 2
Dependent Claim
82 words
A RELIEF VALVE COMPRISING A PLASTIC VALVE BODY HAVING A PLURALITY OF PORTS, A VALVE PLATE, SAID VALVE BODY HAVING A VALVE SEAT AGAINST WHICH SAID PLATE IS ADAPTED TO CLOSE AND HAVING SAID PORTS OPENING THROUGH SAID SEAT AND MEANS FOR URGING SAID VALVE PLATE TO CLOSE SAID PORTS COMPRISING A PAIR OF RESILIENT ARMS INTEGRAL WITH SAID VALVE BODY SAID ARMS HAVING HOOKED ENDS AND A COIL COMPRESSION SPRING BEARING AGAINST SAID VALVE PLATE AND SUPPORTED BY SAID HOOKED ENDS.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-11-10 | 1968-05-11 | 1968-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-10 | 1972-05-11 | 1972-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-10 | 1976-05-11 | 1976-11-10 | $7700.00 | Window Closed / Lapsed |