Seal for circular slots
Abstract
Abstract A SEAL ADAPTED TO BE MOUNTED ON A ROTATABLE SHAFT OR THE LIKE AND PROVIDE A SEAL WITH A MEMBER HAVING A SEALING SURFACE COMPRISING AN ANNULAR BODY PORTION, A BELLOWS SECTIONS PROJECTING FROM SAID BODY PORTION, A SEAL SECTION INCLUDING AT LEAST TWO SEALING LIPS PROJECTING FROM SAID BELLOWS SECTION AND DISPOSED AT AN ANGLE OTHER THAN 90* TO THE SEALING SURFACE, SAID SEAL SECTION INCLUDING A MASS PORTION OPERABLE TO GENERATE CENTRIFUGAL FORCES UPON ROTATION OF THE SHAFT TENDING TO PIVOT THE SEAL SECTION ABOUT SAID BELLOWS SECTION TO INCREASE THE PRESSURE APPLYING RELATION OF ONE OF SAID LIPS RELATIVE TO SAID SEALING SURFACE AND DECREASE THE PRESSURE APPLYING RELATION OF ANOTHER OF SAID LIPS RELATIVE TO SAID SEALING SURFACE.
Inventors
- 👤 Stig Lennart Hallerback
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-19 | 1975-03-21 | 1975-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-19 | 1979-03-21 | 1979-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-19 | 1983-03-21 | 1983-09-20 | $7700.00 | Window Closed / Lapsed |