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US3356336A
Expired / Lapsed
US
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Air-tight sealing device for a valve seat of a butterfly valve
Assignee: Maenaka Valve Works Co Ltd
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Filing: 1965-12-21
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Granted: 1967-12-05
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Expires: 1985-12-21
Abstract
No abstract record available.
Inventors
- 👤 Maenaka Yoshio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:41
CPC Classifications
F; F16; F16K; F16K1/00; F16K1/16; F16K1/18; F16K1/22; F16K1/226; F16K1/2263
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
154 words
IN A BUTTERFLY VALVE INCLUDING A VALVE BODY, A VALVE SEAT IN SAID BODY, AND A VALVE PLATE ADAPTED TO MOVE BETWEEN OPEN AND CLOSED POSITIONS, THE IMPROVED AIR-TIGHT SEALING DEVICE FOR SAID VALVE SEAT OF SAID BUTTERFLY VALVE, SAID VALVE SEAT INCLUDING A GROOVE IN THE INNER WALL OF SAID VALVE BODY AND AN ANNULAR RUBBER RING WHOSE SECTION HAS A CIRCULAR SURFACE AT THE UPPER PORTION THEREOF AND A CENTRAL PROJECTED PORTION AND PROJECTED EDGE PORTIONS AT BOTH SIDES OF THE BOTTOM OF SAID RING, SAID RING BEING EMBEDDED INTO SAID GROOVE IN THE INNER WALL OF SAID VALVE BODY AT A LOCATION WHERE THE PERIPHERAL END OF SAID VALVE PLATE IS IN VERY CLOSE CONTACT WHEN THE BUTTERFLY VALVE IS CLOSED WHEREBY THE CIRCULAR SUFACE OF THE ANNULAR RUBBER RING IS IN CONTACT WITH THE PERIPHERAL SURFACE OF THE VALVE PLATE WHEN THE VALVE PLATE IS MOVED TO ITS CLOSED POSITION.
Claim 2
Dependent Claim
154 words
IN A BUTTERFLY VALVE INCLUDING A VALVE BODY, A VALVE SEAT IN SAID BODY, AND A VALVE PLATE ADAPTED TO MOVE BETWEEN OPEN AND CLOSED POSITIONS, THE IMPROVED AIR-TIGHT SEALING DEVICE FOR SAID VALVE SEAT OF SAID BUTTERFLY VALVE, SAID VALVE SEAT INCLUDING A GROOVE IN THE INNER WALL OF SAID VALVE BODY AND AN ANNULAR RUBBER RING WHOSE SECTION HAS A CIRCULAR SURFACE AT THE UPPER PORTION THEREOF AND A CENTRAL PROJECTED PORTION AND PROJECTED EDGE PORTIONS AT BOTH SIDES OF THE BOTTOM OF SAID RING, SAID RING BEING EMBEDDED INTO SAID GROOVE IN THE INNER WALL OF SAID VALVE BODY AT A LOCATION WHERE THE PERIPHERAL END OF SAID VALVE PLATE IS IN VERY CLOSE CONTACT WHEN THE BUTTERFLY VALVE IS CLOSED WHEREBY THE CIRCULAR SUFACE OF THE ANNULAR RUBBER RING IS IN CONTACT WITH THE PERIPHERAL SURFACE OF THE VALVE PLATE WHEN THE VALVE PLATE IS MOVED TO ITS CLOSED POSITION.
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) | 1970-12-04 | 1971-06-05 | 1971-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-12-04 | 1975-06-05 | 1975-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-12-04 | 1979-06-05 | 1979-12-05 | $7700.00 | Window Closed / Lapsed |