US3391901A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High vacuum leak valve
Assignee: Varian Medical Systems Inc
•
Filing: 1964-09-30
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Granted: 1968-07-09
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Expires: 1984-09-30
Abstract
No abstract record available.
Inventors
- 👤 William R Wheeler
- 👤 Paul W Hait
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:40
CPC Classifications
F; F16; F16K; F16K51/00; F16K51/02; F16K1/00; F16K1/32; F16K1/34; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19535
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
145 words
A HIGH VACUUM LEAK VALVE COMPRISING: A VALVE SHELL PROVIDED WITH AN INLET OPENING AND AN OUTLET PASSAGE; A VALVE SEAT DISPOSED WITHIN SAID OUTLET PASSAGE; A VALVE MEMBER DISPOSED WITHIN SAID SHELL ADAPTED FOR MOVEMENT RELATIVE TO SAID VALVE SEAT AND TO BE ENGAGED BY SAID VALVE SEAT UPON VALVE CLOSURE; SAID SEAT INCLUDING A RETAINING SLEEVE, A SOFT METAL GASKET HAVING AN UPPER AND LOWER PORTION DISPOSED TIGHTLY ABOUT SAID SLEEVE, AND A COLLAR DISPOSED TIGHTLY ABOUT SAID GASKET RING UPPER PORTION, SAID GASKET HAVING A SEATING SURFACE EXTENDING ABOVE SAID COLLAR AND SLEEVE; SAID GASKET RING LOWER PORTION EXTENDING OUTWARDLY BEYOND SAID COLLAR IN TIGHT FITTING RELATIONSHIP WITH SAID VALVE SHELL; SAID VALVE MEMBER BEING PROVIDED WITH A HIGHLY POLISHED CLOSURE SURFACE FACING SAID SEATING SURFACE; AND, UPON VALVE CLOSURE SAID SEATING SURFACE AND SAID CLOSURE SURFACE FORMING A VACUUM-TIGHT SEAL THEREBETWEEN.
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) | 1971-07-09 | 1972-01-08 | 1972-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-09 | 1976-01-08 | 1976-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-09 | 1980-01-08 | 1980-07-09 | $7700.00 | Window Closed / Lapsed |