US3667767A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Seal with variable sealing lip pressure
Assignee: Motors Liquidation Co
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Filing: 1970-09-14
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Granted: 1972-06-06
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Expires: 1990-09-14
Abstract
Abstract A SEAL FOR A LIQUID FILLED CHAMBER HAS A RADIALLY OPEN CAVITY BEHIND A FLEXIBLE WALL WHICH CARRIES ANNULAR SEALING LIPS. UNDER STATIC CONDITIONS THE CAVITY IS FILLED WITH LIQUID UNDER POSITIVE PRESSURE AND INCREASES THE SEALING LIP CONTACT PRESSURE. UNDER DYNAMIC CONDITIONS THE LIQUID IS EXPELLED FROM THE CAVITY, THE PRESSURE OF THE LIQUID IN THE SEAL AREA IS REDUCED, AND THE SEALING LIP CONTACT PRESSURE IS LIGHTER.
Inventors
- 👤 Thomas W Bakewell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 03:40
CPC Classifications
F; F01; F01P; F01P5/00; F01P5/10; F16; F16J; F16J15/00; F16J15/16; F16J15/34; F16J15/3436; F16J15/3456
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-06 | 1975-12-06 | 1976-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-06 | 1979-12-06 | 1980-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-06 | 1983-12-06 | 1984-06-06 | $7700.00 | Window Closed / Lapsed |