Patent US3383088A successfully refreshed from Google Patents.
US3383088A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plug valves
Assignee: Flowserve Corp
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Filing: 1966-02-03
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Granted: 1968-05-14
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Expires: 1986-02-03
Abstract
No abstract record available.
Inventors
- 👤 Donn W Duffey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:17
CPC Classifications
F; F16; F16K; F16K5/00; F16K5/02; F16K5/0257; F16K5/0271; F16K27/00; F16K27/06; F16K27/062; F16K39/00; F16K39/06; F16K5/0207; F16K5/0264; F16K5/08; F16K5/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
205 words
A PLUG VALVE INCLUDING A BODY HAVING A BORE, PORTS OPENING INTO SAID BORE, A FLUOROCARBON RESIN SLEEVE RECEIVED IN SAID BORE, SAID SLEEVE HAVING OPENINGS THEREIN COMMUNICATING WITH SAID PORTS, A VALVE PLUG RECEIVED IN SEALING RELATION IS SAID SLEEVE, A PORT IN SAID PLUG COMMUNICATING WITH SAID BODY PORTS IN THE OPEN POSITION OF THE VALVE AND SEALED BY SAID SLEEVE IN THE CLOSED POSITION OF SAID VALVE, SAID SLEEVE BEING DEFORMABLE INTO SAID PLUG PORT IN THE CLOSED POSITION OF THE VALVE BY ACCUMULATION OF PRESSURE BETWEEN THE BODY AND THE OPPOSED FACING PORTION OF THE SLEEVE, SAID SLEEVE INCLUDING MEANS DEFINING A PRESSURE RELIEF AREA WHICH BURSTS AT A PRESSURE ABOVE A PREDETERMINED MINIMUM TO RELIEVE SAID ACCUMULATED PRESSURE INTO THE PLUG PORT, PORTIONS OF SAID SLEEVE OTHER THAN THE RELIEF AREA BEING CAPABLE OF WITHSTANDING PRESSURE ABOVE SAID PREDETERMINED MINIMUM, AND SAID PRESSURE RELIEF AREA BEING SO LOCATED IN SAID SLEEVE THAT IN THE EVENT OF PRESSURE CONDITIONS ABOVE SAID PREDETERMINED MINIMUM THE PRESSURE BETWEEN THE BODY AND THE PORTION OF THE SLEEVE FACING THE PLUG PORT IS REDUCED BELOW SAID PREDETERMINED MINIMUM THEREBY PREVENTING TURNING OR TEARING OF THE SLEEVE AS THE PLUG IS ROTATED TO THE OPEN POSITION.
Claim 2
Dependent Claim
205 words
A PLUG VALVE INCLUDING A BODY HAVING A BORE, PORTS OPENING INTO SAID BORE, A FLUOROCARBON RESIN SLEEVE RECEIVED IN SAID BORE, SAID SLEEVE HAVING OPENINGS THEREIN COMMUNICATING WITH SAID PORTS, A VALVE PLUG RECEIVED IN SEALING RELATION IS SAID SLEEVE, A PORT IN SAID PLUG COMMUNICATING WITH SAID BODY PORTS IN THE OPEN POSITION OF THE VALVE AND SEALED BY SAID SLEEVE IN THE CLOSED POSITION OF SAID VALVE, SAID SLEEVE BEING DEFORMABLE INTO SAID PLUG PORT IN THE CLOSED POSITION OF THE VALVE BY ACCUMULATION OF PRESSURE BETWEEN THE BODY AND THE OPPOSED FACING PORTION OF THE SLEEVE, SAID SLEEVE INCLUDING MEANS DEFINING A PRESSURE RELIEF AREA WHICH BURSTS AT A PRESSURE ABOVE A PREDETERMINED MINIMUM TO RELIEVE SAID ACCUMULATED PRESSURE INTO THE PLUG PORT, PORTIONS OF SAID SLEEVE OTHER THAN THE RELIEF AREA BEING CAPABLE OF WITHSTANDING PRESSURE ABOVE SAID PREDETERMINED MINIMUM, AND SAID PRESSURE RELIEF AREA BEING SO LOCATED IN SAID SLEEVE THAT IN THE EVENT OF PRESSURE CONDITIONS ABOVE SAID PREDETERMINED MINIMUM THE PRESSURE BETWEEN THE BODY AND THE PORTION OF THE SLEEVE FACING THE PLUG PORT IS REDUCED BELOW SAID PREDETERMINED MINIMUM THEREBY PREVENTING TURNING OR TEARING OF THE SLEEVE AS THE PLUG IS ROTATED TO THE OPEN POSITION.
References Cited (Backward Citations)
US2994504A
Cited
US3066909A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-05-14 | 1971-11-13 | 1972-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-14 | 1975-11-13 | 1976-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-14 | 1979-11-13 | 1980-05-14 | $7700.00 | Window Closed / Lapsed |