Hydrostatic ring seal construction
Abstract
Abstract A SHAFT IS SURROUNDED BY AN FIXED WITH A FIRST ANNULAR SEALING MEMBER, AND THE LATTER IN TURN IS SURROUNDED BY A PAIR OF SECOND ANNULAR SEALING MEMBERS. THESE SECOND ANNULAR SEALING MEMBERS HAVE JUXTAPOSED AXIAL SEALING FACES WHICH DEFINE WITH ONE ANOTHER A RADIAL GAP. EACH OF THE SECOND MEMBERS INCLUDES AN ANNULAR SUPPORTING PORTION, AND ANNULAR SEALING PORTION FIXED WITH THE SUPPORTING PORTION AND HAVING ONE OF THE AXIAL SEALING FACES MENTIONED BEFORE, AND AN ANNULAR STABILIZING PORTION. ONE OF THE PORTIONS IS FLANKED AT ITS OPPOSITE AXIAL SIDES BY THE OTHER TWO ANNULAR PORTIONS AND IS COMPOSED OF A MATERIAL THE COEFFICIENT OF THERMAL EXPANSION OF WHICH IS EIGHER LARGER OR SMALLER THAN THAT OF THE OTHER TWO ANNULAR PORTIONS.
Inventors
- 👤 R Dernedde
- 👤 H Freese
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) | 1976-02-27 | 1976-08-28 | 1977-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-27 | 1980-08-28 | 1981-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-27 | 1984-08-28 | 1985-02-27 | $7700.00 | Window Closed / Lapsed |