US3143969A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid pump and meter
Assignee: ROY S SANFORD AND CO
•
Filing: 1961-05-11
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Granted: 1964-08-11
•
Expires: 1981-05-11
Abstract
No abstract record available.
Inventors
- 👤 Eames James Owen
- 👤 Roy S Sanford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:49
CPC Classifications
F; F04; F04B; F04B53/00; F04B53/10; F04B53/12; F04B53/123; F02; F02M; F02M59/00; F04B49/00; F04B49/02; F04B49/022; F04B5/00; F02M2700/00; F02M2700/13; F02M2700/1317
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
154 words
A PUMP FOR LIQUID INCLUDING A SUCTION CHAMBER HAVING AN INLET VALVE AND A RETURN VALVE, SAID CHAMBER BEING ADAPTED TO RECEIVE LIQUID FROM A LIQUID SUPPLY THROUGH THE INLET VALVE AND TO RETURN A PORTION OF THE LIQUID TO THE SUPPLY THROUGH THE RETURN VALVE, A PUMPING CHAMBER HAVING A DISCHARGE VALVE, MEANS CONNECTING SAID CHAMBERS INCLUDING A ONE-WAY VALVE FOR CONDUCTING LIQUID FROM THE SUCTION CHAMBER TO THE PUMPING CHAMBER, MOVABLE DIFFERENTIAL LIQUID DISPLACING MEANS ASSOCIATED WITH SAID CHAMBERS MOVABLE IN ONE DIRECTION TO DRAW LIQUID INTO SAID SUCTION CHAMBER FROM A SUPPLY AND TO DISCHARGE LIQUID FROM THE PUMPING CHAMBER THROUGH SAID DISCHARGE VALVE AND MOVABLE IN THE OPPOSITE DIRECTION TO TRANSFER A PORTION OF THE LIQUID DRAWN INTO THE SUCTION CHAMBER TO SAID PUMPING CHAMBER THROUGH SAID CONNECTING MEANS AND TO RETURN THE REST OF THE LIQUID SO DRAWN IN TO THE LIQUID SUPPLY THROUGH SAID RETURN VALVE, SAID DIS-
Claim 2
Dependent Claim
154 words
A PUMP FOR LIQUID INCLUDING A SUCTION CHAMBER HAVING AN INLET VALVE AND A RETURN VALVE, SAID CHAMBER BEING ADAPTED TO RECEIVE LIQUID FROM A LIQUID SUPPLY THROUGH THE INLET VALVE AND TO RETURN A PORTION OF THE LIQUID TO THE SUPPLY THROUGH THE RETURN VALVE, A PUMPING CHAMBER HAVING A DISCHARGE VALVE, MEANS CONNECTING SAID CHAMBERS INCLUDING A ONE-WAY VALVE FOR CONDUCTING LIQUID FROM THE SUCTION CHAMBER TO THE PUMPING CHAMBER, MOVABLE DIFFERENTIAL LIQUID DISPLACING MEANS ASSOCIATED WITH SAID CHAMBERS MOVABLE IN ONE DIRECTION TO DRAW LIQUID INTO SAID SUCTION CHAMBER FROM A SUPPLY AND TO DISCHARGE LIQUID FROM THE PUMPING CHAMBER THROUGH SAID DISCHARGE VALVE AND MOVABLE IN THE OPPOSITE DIRECTION TO TRANSFER A PORTION OF THE LIQUID DRAWN INTO THE SUCTION CHAMBER TO SAID PUMPING CHAMBER THROUGH SAID CONNECTING MEANS AND TO RETURN THE REST OF THE LIQUID SO DRAWN IN TO THE LIQUID SUPPLY THROUGH SAID RETURN VALVE, SAID DIS-
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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) | 1967-08-11 | 1968-02-10 | 1968-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-11 | 1972-02-10 | 1972-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-11 | 1976-02-10 | 1976-08-11 | $7700.00 | Window Closed / Lapsed |