US3554569A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dynamic pressure seal devices
Assignee: Individual
•
Filing: 1969-08-04
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Granted: 1971-01-12
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Expires: 1989-08-04
Abstract
Abstract SEAL DEVICES OF GENERALLY ANNULAR FORM HAVING INNER AND OUTER SIDES EACH CARRYING ONE OR MORE SEALING LIPS, A CLOSED END FACE, AND AN OPEN END FACE, THE OPENINGS OF WHICH ARE ENTRIES TO CAVITIES WHICH ARE SEPARATED BY RIBS THAT ARE SYMMETRICALLY DISPOSED ABOUT THE SEAL DEVICE CENTRAL AXIS. IN SOME EMBODIMENTS, THE TOTAL AREA OF THE CAVITY INNER AND OUTER SIDEWALLS IS SPECIALLY RELATED TO THE TOTAL AREA OF THE OPEN END FACE TO ESTABLISH A "CONTROLLED COUNTERPRESSURE" CONDITION. IN A PREFERRED EMBODIMENT, THE RIBS ARE SLANTED TO ACHIEVE AN INTERNAL SPRING ACTION.
Inventors
- 👤 Gerald W Gorman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:10
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/32; F16J15/3204; F16J15/3232; F16J15/3236
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) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |