Rotary seal
Abstract
Abstract A LOW PRESSURE ROTARY SEAL HAVING A PLURALITY OF SEALING SEGMENTS AND SPACERS WHICH ENCIRCLE AN ESSENTIALLY CYLINDRICAL MEMBER AND WHICH OBSTRUCT AN OVERSIZE OPENING THROUGH WHICH THE CYLINDRICAL MEMBER EXTENDS INTO A CHAMBER ENCLOSURE. EITHER THE CYLINDRICAL MEMBER OR THE ENCLOSURE MAY ROTATE. THE SEALING SEGMENTS ARE RADIALLY MOVABLE WITH RESPECT TO THE AXIS OF THE CYLINDRICAL MEMBER, HAVE PARALLEL END EDGES AND AN ARCUATE INNER EDGE WHICH CONFORMS TO THE PERIPHERY OF THE MEMBER. THE SEALING SPACERS ARE FIXEDLY MOUNTED WEDGES WHICH ARE LOCATED BETWEEN THE SEGMENTS AND HAVE END EDGES WHICH ARE PARALLEL TO AND IN SLIDABLE CONTACT WITH THE END EDGES OF ADJACENT SEGMENTS. AUTOMATIC COMPENSATION FOR WEAR IS EFFECTED BY CONTINUOUSLY URGING THE SEGMENTS INTO CONTACT WITH THE CYLINDRICAL MEMBER.
Inventors
- 👤 Ray M Rickerson
Bibliographic Details
Claims Analysis
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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) | 1974-03-01 | 1974-08-31 | 1975-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-01 | 1978-08-31 | 1979-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-01 | 1982-08-31 | 1983-03-02 | $7700.00 | Window Closed / Lapsed |