Fluid pump
Abstract
Abstract FLUID PUMP HAVING UPPER AND LOWER PAIRS OF LATERALLY DISPOSED CHAMBERS WITH LIQUID RECEIVING OPENINGS IN LOWER CHAMBERS. LIQUID DISCHARGE CONDUITS EXTEND ABOVE UPPER CHAMBERS AND COMMUNICATE WITH LOWER PORTION OF UPPER CHAMBERS. LOWER PORTION OF ONE CHAMBER OF UPPER CHAMBERS COMMUNICATES WITH LOWER PORTION OF ONE CHAMBER OF LOWER CHAMBERS WHILE LOWER PORTION OF OTHER CHAMBER OF UPPER CHAMBERS COMMUNICATES WITH LOWER PORTION OF OTHER CHAMBER OF LOWER CHAMBERS WITH CHECK VALVES PREVENTING FLOW OF LIQUID FROM UPPER CHAMBER TO LOWER CHAMBER. A FIRST CONDUIT COMMUNICATES WITH UPPER PORTION OF SAID ONE CHAMBER OF UPPER CHAMBERS AND UPPER PORTION OF SAID OTHER CHAMBER OF LOWER CHAMBERS WHILE A SECOND CONDUIT COMMUNICATES WITH UPPER PORTION OF SAID OTHER CHAMBER OF UPPER CHAMBERS AND UPPER PORTION OF SAID ONE CHAMBER OF LOWER CHAMBERS. GAS INTRODUCED ALTERNATELY INTO FIRST CONDUIT AS EXHAUSTED THROUGH SECOND CONDUIT AND ALTERNATELY INTO SECOND CONDUIT AS EXHAUSTED THROUGH FIRST CONDUIT.
Inventors
- 👤 Douglas R Self
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) | 1975-07-11 | 1976-01-10 | 1976-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-11 | 1980-01-10 | 1980-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-11 | 1984-01-10 | 1984-07-11 | $7700.00 | Window Closed / Lapsed |