Rotary seal,for oil pumps
Abstract
Abstract A ROTARY SEAL COMPRISES A SHAFT ROTATABLY MOUNTED IN A HOLLOW HOUSING WHICH HAS A RECESSED PORTION. WITHIN THIS RECESS THERE IS A RING-SHAPED SEAT PORTION DISPOSED COAXIALLY WITH THE SHAFT. A STATIONARY BEARING SEAT MEMBER COMPRISING A SINTERED CARBON RING HAVING A FLAT BEARING SURFACE IS PRESSED AGAINST THE RING-SHAPED SEAT BY SPRING MEANS. THE SURFACE OF THE CARBON RING OPPOSITE THE FLAT BEARING SURFACE IS PREFERABLY IMPREGNATED WITH A MATERIAL SUCH AS A METAL TO AVOID POROSITY. HOWEVER THE IMPREGNATING MATERIAL DOES NOT REACH THE FLAT BEARING SURFACE. A ROTATABLE METAL SEALING RING MEMBER IS PRESSED AGAINST THE SINTERED CARBON RING THUS PRODUCING A SEAL BETWEEN THESE MEMBERS.
Inventors
- 👤 Jorgen Hartvig Petersen
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) | 1974-06-27 | 1974-12-27 | 1975-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-27 | 1978-12-27 | 1979-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-27 | 1982-12-27 | 1983-06-28 | $7700.00 | Window Closed / Lapsed |