Centrifugal liquid pump means
Abstract
Abstract CENTRIFUGAL LIQUID PUMP MEANS PARTIALLY INCLUDING MEANS FOR SEALING THE IMPELLER SHAFT OF THE PUMP AGAINST AIR OR LIQUID LEAKAGE. THE IMPELLER SHAFT EXTENDS THROUGH A PAIR OF ANNULAR SEALING UNITS WHICH IN TURN ARE STATIONARILY SEALINGLY SECURED IN THE PUMP HOUSING. THE PAIR OF SEALS EACH INCLUDE A SEMI-RESILIENT SEAL ELEMENT HAVING A LIP PORTION RUNNINGLY CIRCUMFERENTIALLY EMBRACING THE IMPELLER SHAFT. THE PAIR OF SEALING UNITS ARE SPACED AXIALLY WIDE APART AND ARE ARRANGED WITH THE LIP PORTIONS THEREOF CONFRONTINGLY ARRANGED. THE SPACE BETWEEN THE PAIR OF SEAL UNITS DEFINES A LUBRICANT CHAMBER ADAPTED FOR CONTAINING LUBRICANT FOR LUBRICATING THE RUNNING ENGAGEMENT OF THE SEALING LIP EDGES OF THE SEALING UNITS ON THE IMPELLER SHAFT.
Inventors
- 👤 William J Bond Jr
Bibliographic Details
Claims Analysis
Total Claims: 0References 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) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |