Safety relief valve
Abstract
Abstract FOR USE IN A SAFETY RELIEF VALVE WICH INCORPORATES A HOLLOW BODY HAVING THEREIN A VALVE SEAT AND A VALVE MEMBER WHICH CLOSES A PASSAGE THROUGH THE VALVE SEAT, AN IMPROVEMENT WHICH INCLUDES A PLASTIC SEAL CARRIED ON SAID VALVE MEMBER AND ADAPTED TO BE CONTACTED AGAINST SAID VALVED SEAT, THE VALVE SEAT BEING TAPERED AT A PREDETERMINED ANGLE WITH RESPECT TO THE VALVE BODY AND BEARING AGAINST THE PLASTIC SEAL WITH A SIMILAR BUT DIFFERENTLY INCLINED TAPER ON THE VALVE BODY IMMEDIATELY ADJACENT AND BEHIND THE VALVE SEAL TO PROVIDE A LINE OF CONTACT AND CLOSURE WHEN THE PLASTIC SEAL BEARS AGAINST THE SEAT AND A SECONDARY BUT EQUALLY EFFECTIVE LINE OF CLOSURE BY THE DIFFERENTLY TAPERED VALVE MEMBER IMMEDIATELY TO THE REAR OF THE SEAL SO THAT WEAR OF THE SEAL DOES NOT EFFECT THE OPERATION OF THE VALVE.
Inventors
- 👤 John W Kinsel
Bibliographic Details
Claims Analysis
Total Claims: 0References 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) | 1974-09-19 | 1975-03-21 | 1975-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-19 | 1979-03-21 | 1979-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-19 | 1983-03-21 | 1983-09-20 | $7700.00 | Window Closed / Lapsed |