US3128632A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Force-balanced multiple position seals for valves and the like
Assignee: Calmec Manufacturing Corp
•
Filing: 1961-02-24
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Granted: 1964-04-14
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Expires: 1981-02-24
Abstract
No abstract record available.
Inventors
- 👤 Leland W Green
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:17
CPC Classifications
F; F16; F16K; F16K41/00; F16K41/10; F16K41/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
153 words
A FORCE-BALANCED SEAL ADAPTED FOR USE IN CONJUNCTION WITH A STEM, CONTROL ROD OR THE LIKE MOVABLY ASSOCIATED WITH A STATIONARY WALL BODY, COMPRISING: A WALL BODY PROVIDED WITH A BORE AND A STEM EXTENDING INTO SAID BORE; A THIN, FLEXIBLE CORROSION-RESISTANT ANNULAR DIAPHRAGM HAVING ITS OUTER EDGE FIRMLY ATTACHED TO SAID WALL BODY AT SAID BORE AND ITS INNER EDGE FIRMLY ATTACHED TO SAID STEM TO SEAL SAID BORE; A BODY OF MOBILE, VIRTUALLY INCOMPRESSIBLE BACK-UP MATERIAL WITHIN SAID BORE AND IN CONTACT WITH THE OUTER ANNULAR FACE OF SAID THIN DIAPHRAGM; THE INNER ANNULAR FACE OF SAID THIN DIAPHRAGM BEING SUBJECTED TO A PREDETERMINED PRESSURE WITHIN SAID WALL BODY; AND PREDETERMINED CONTROLLABLE FORCE APPLYING MEANS FOR CONTINUOUSLY RETAINING SAID BODY OF MATERIAL IN CONTACT WITH AND SUPPORT FOR SAID OUTER ANNULAR FACE OF SAID DIAPHRAGM AT ALL POSITIONS OF MOVEMENT OF SAID STEM AND DIAPHRAGM SO AS TO PROVIDE BALANCED PRES-
Claim 2
Dependent Claim
153 words
A FORCE-BALANCED SEAL ADAPTED FOR USE IN CONJUNCTION WITH A STEM, CONTROL ROD OR THE LIKE MOVABLY ASSOCIATED WITH A STATIONARY WALL BODY, COMPRISING: A WALL BODY PROVIDED WITH A BORE AND A STEM EXTENDING INTO SAID BORE; A THIN, FLEXIBLE CORROSION-RESISTANT ANNULAR DIAPHRAGM HAVING ITS OUTER EDGE FIRMLY ATTACHED TO SAID WALL BODY AT SAID BORE AND ITS INNER EDGE FIRMLY ATTACHED TO SAID STEM TO SEAL SAID BORE; A BODY OF MOBILE, VIRTUALLY INCOMPRESSIBLE BACK-UP MATERIAL WITHIN SAID BORE AND IN CONTACT WITH THE OUTER ANNULAR FACE OF SAID THIN DIAPHRAGM; THE INNER ANNULAR FACE OF SAID THIN DIAPHRAGM BEING SUBJECTED TO A PREDETERMINED PRESSURE WITHIN SAID WALL BODY; AND PREDETERMINED CONTROLLABLE FORCE APPLYING MEANS FOR CONTINUOUSLY RETAINING SAID BODY OF MATERIAL IN CONTACT WITH AND SUPPORT FOR SAID OUTER ANNULAR FACE OF SAID DIAPHRAGM AT ALL POSITIONS OF MOVEMENT OF SAID STEM AND DIAPHRAGM SO AS TO PROVIDE BALANCED PRES-
References Cited (Backward Citations)
US1003916A
Cited
US2703016A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-04-14 | 1967-10-14 | 1968-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-14 | 1971-10-14 | 1972-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-14 | 1975-10-14 | 1976-04-14 | $7700.00 | Window Closed / Lapsed |