US3207471A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gate valve having seat removable through flow passage
Assignee: Individual
•
Filing: 1962-03-12
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Granted: 1965-09-21
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Expires: 1982-03-12
Abstract
No abstract record available.
Inventors
- 👤 John L Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:27
CPC Classifications
F; F16; F16K; F16K3/00; F16K3/02; F16K3/0227
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
155 words
IN A GATE VALVE HAVING A BODY PROVIDED WITH END FLANGES FOR SECUREEMENT TO THE FLANGES OF PIPES TO BE ASSOCIATED WITH SAID VALVE, SAID BODY HAVING A FLOW PASSAGE, A GATE BLADE MOVABLE ACROSS SAID FLOW PASSAGE, AND AN ELASTOMER SEAT UNIT MOUNTED WITHIN SAID FLOW PASSAGE INTERMEDIATE THE ENDS THEREOF, SAID UNIT BEING A SIZE TO BE ENTIRELY PASSED INTO SAID FLOW PASSAGE TO ITS FINAL POSITION, SAID UNIT BEING SEPARATE FROM SAID BODY FLANGES, SAID UNIT INCLUDING A RIGID ANNULAR MOUNTING MEMBER WELDED TO THE WALL OF SAID BODY WHICH DEFINES THE FLOW PASSAGE, SAID UNIT INCLUDING AN ANNULAR ELASTOMER ELEMENT PROJECTING INTO THE PATH OF TRAVEL OF SAID BLADE AND FORMING A CONTINUOUS ANNULAR SEAL WITH SAID MOUNTING MEMBER, AND MEANS INDEPENDENT OF SAID GATE BLADE FOR ADJUSTING THE POSITION OF THE BLADE-CONTACTING PORTION OF THE ELASTOMER ELEMENT TO VARY THE PRESSURE OF CONTACT BETWEEN THE ELASTOMER ELEMENT AND THE BLADE.
References Cited (Backward Citations)
GB762830A
Cited
US3081974A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-09-20 | 1969-03-22 | 1969-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-20 | 1973-03-22 | 1973-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-20 | 1977-03-22 | 1977-09-21 | $7700.00 | Window Closed / Lapsed |