Self-purging regenerative turbine pump
Abstract
Abstract A SELF-PURGING REGENERATIVE TURBINE PUMP SO CONSTRUCTED THAT INTERNAL CLEARANCE SPACES AND CAVITIES ARE CONTINUOUSLY PURGED DURING OPERATION OF THE PUMP, THEREBY PERMITTING THE PUMPING OF CONTAMINATED LIQUIDS. CLEARANCE SPACES BETWEEN THE ENDS OF THE IMPELLER AND THE ADJACENT SURFACES OF THE HOUSING, AND BETWEEN THE PERIPHERY OF THE IMPELLER AND THE STRIPPER WALL OF THE HOUSING ARE SLIGHTLY THICKER THAN THE SIZE OF CONTAMINANTS ENTRAINED IN THE LIQUID BEING PUMPED. THE FIRST-MENTIONED SPACES COMMUNICATE WITH A SEAL CAVITY, AND THE SEAL CAVITY HAS MEANS OF THE FREE HYDRAULIC COMMUNICATION WITH THE INLET OF THE PUMP TO INSURE A CONTINUOUS FLOW OF PURGING LIQUID AS LONG AS THE PUMP IS IN OPERATION.
Inventors
- 👤 Simon Bylsma
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) | 1974-01-25 | 1974-07-27 | 1975-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-25 | 1978-07-27 | 1979-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-25 | 1982-07-27 | 1983-01-26 | $7700.00 | Window Closed / Lapsed |