Patent US3394731A successfully refreshed from Google Patents.
US3394731A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Check valve having improved valve seat
Assignee: TESORO PUMP & VALVE Co A CORP OF
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Filing: 1964-01-06
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Granted: 1968-07-30
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Expires: 1984-01-06
Abstract
No abstract record available.
Inventors
- 👤 Robert E Elliott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:40
CPC Classifications
F; F16; F16K; F16K15/00; F16K15/02; F16K15/03; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7898; Y10T137/7903
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
165 words
A VALVE COMPRISING: A BODY HAVING A FLUID PASSAGE DEFINED IN PART BY A INTEGRAL REDUCED INTERNAL DIAMETER CIRCUMFERENTIAL BODY SEATING FLANGE HAVING A FORWARD AND REARWARDLY SURFACE, THE REARWARD SURFACE BEING DEFINED SUBSTANTIALLY BY A TRUNCATED CONE; A REMOVABLE TUBULAR VALVE SEAT RECEIVED BY SAID SEATING FLANGE, SAID SEAT INCLUDING AN INTEGRAL FORWARD CIRCULAR FLANGE PORTION IN A PLANE SUBSTANTIALLY PERPENDICULAR THE TUBULAR AXIS OF SAID VALVE SEAT, SAID FLANGE PORTION SEALABLY ENGAGING SAID BODY SEATING FLANGE, SAID TUBULAR VALVE SEAT IN THE REARWARD PORTION THEREOF HAVING A MULIPLICITY OF THREADED SPACED APART OPENINGS THEREIN, THE AXIS OF EACH OF SAID THREADED OPENINGS BEING DISPOSED TO INTERSECT SAID REARWARD SURFACE OF SAID SEATING FLANGE SUBSTANTIALLY PERPENDICULARLY THERETO; A SETSCREW THREADED INTO EACH OF SAID OPENINGS, THE INNER END OF EACH OF SAID SETSCREWS ENGAGING, WHEN SAID SETSCREW IS IN THE THREADABLY ADVANCED POSITION, SAID SEATING FLANGE; AND CLOSURE MEANS IN SAID VALVE BODY SEALABLY ENGAGEABLE IN THE CLOSED POSITION THEREOF WITH SAID VALVE SEAT.
Claim 2
Dependent Claim
165 words
A VALVE COMPRISING: A BODY HAVING A FLUID PASSAGE DEFINED IN PART BY A INTEGRAL REDUCED INTERNAL DIAMETER CIRCUMFERENTIAL BODY SEATING FLANGE HAVING A FORWARD AND REARWARDLY SURFACE, THE REARWARD SURFACE BEING DEFINED SUBSTANTIALLY BY A TRUNCATED CONE; A REMOVABLE TUBULAR VALVE SEAT RECEIVED BY SAID SEATING FLANGE, SAID SEAT INCLUDING AN INTEGRAL FORWARD CIRCULAR FLANGE PORTION IN A PLANE SUBSTANTIALLY PERPENDICULAR THE TUBULAR AXIS OF SAID VALVE SEAT, SAID FLANGE PORTION SEALABLY ENGAGING SAID BODY SEATING FLANGE, SAID TUBULAR VALVE SEAT IN THE REARWARD PORTION THEREOF HAVING A MULIPLICITY OF THREADED SPACED APART OPENINGS THEREIN, THE AXIS OF EACH OF SAID THREADED OPENINGS BEING DISPOSED TO INTERSECT SAID REARWARD SURFACE OF SAID SEATING FLANGE SUBSTANTIALLY PERPENDICULARLY THERETO; A SETSCREW THREADED INTO EACH OF SAID OPENINGS, THE INNER END OF EACH OF SAID SETSCREWS ENGAGING, WHEN SAID SETSCREW IS IN THE THREADABLY ADVANCED POSITION, SAID SEATING FLANGE; AND CLOSURE MEANS IN SAID VALVE BODY SEALABLY ENGAGEABLE IN THE CLOSED POSITION THEREOF WITH SAID VALVE SEAT.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-07-30 | 1972-01-29 | 1972-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-30 | 1976-01-29 | 1976-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-30 | 1980-01-29 | 1980-07-30 | $7700.00 | Window Closed / Lapsed |