Patent US3153387A successfully refreshed from Google Patents.
US3153387A
Expired / Lapsed
US
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Pumping unit
Assignee: E V A G SOC DI RESPONSABILIDAD
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Filing: 1963-03-14
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Granted: 1964-10-20
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Expires: 1983-03-14
Abstract
No abstract record available.
Inventors
- 👤 Georges H Sadouet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:47
CPC Classifications
F; F04; F04B; F04B47/00; F04B47/02; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18056; Y10T74/18176; Y10T74/18182; Y10T74/21; Y10T74/2142; Y10T74/2154; Y10T74/2156
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
134 words
IN COMBINATION WITH A WELL PUMP HAVING A CYLINDER AND PISTON AND A CASING EXTENDING UP FROM SAID CYLINDER AND RECEIVING LIQUID DISCHARGED FROM SAID PUMP, A PUMPING STRING CONNECTED TO SAID PISTON AND EXTENDING UP THROUGH SAID CASING, FIRST COUNTERWEIGHT MEANS CONNECTED TO THE UPPER END OF SAID PUMPING STRING PARTIALLY TO COUNTERBALANCE THE WEIGHT OF SAID PUMPING STRING, DRIVE MEANS FOR MOVING SAID PUMPING STRING UPWARDLY, SECOND COUNTERWEIGHT MEANS CONNECTED WITH SAID DRIVE MEANS, AND MEANS FOR TRANSMITTING FORCE FROM SAID DRIVE MEANS AND SAID SECOND COUNTERWEIGHT MEANS TO SAID PUMPING STRING AND FIRST COUNTERWEIGHT MEANS TO MOVE SAID PUMPING STRING IN AN UPWARD DIRECTION ONLY, DOWNWARD MOVEMENT OF SAID PUMPING STRING BEING EFFECTED SOLELY BY GRAVITY SAID DRIVE MEANS AND SECOND COUNTERWEIGHT MEANS BEING MOVABLE THROUGH A COMPLETE STROKE WITHOUT MOVEMENT
Claim 2
Dependent Claim
134 words
IN COMBINATION WITH A WELL PUMP HAVING A CYLINDER AND PISTON AND A CASING EXTENDING UP FROM SAID CYLINDER AND RECEIVING LIQUID DISCHARGED FROM SAID PUMP, A PUMPING STRING CONNECTED TO SAID PISTON AND EXTENDING UP THROUGH SAID CASING, FIRST COUNTERWEIGHT MEANS CONNECTED TO THE UPPER END OF SAID PUMPING STRING PARTIALLY TO COUNTERBALANCE THE WEIGHT OF SAID PUMPING STRING, DRIVE MEANS FOR MOVING SAID PUMPING STRING UPWARDLY, SECOND COUNTERWEIGHT MEANS CONNECTED WITH SAID DRIVE MEANS, AND MEANS FOR TRANSMITTING FORCE FROM SAID DRIVE MEANS AND SAID SECOND COUNTERWEIGHT MEANS TO SAID PUMPING STRING AND FIRST COUNTERWEIGHT MEANS TO MOVE SAID PUMPING STRING IN AN UPWARD DIRECTION ONLY, DOWNWARD MOVEMENT OF SAID PUMPING STRING BEING EFFECTED SOLELY BY GRAVITY SAID DRIVE MEANS AND SECOND COUNTERWEIGHT MEANS BEING MOVABLE THROUGH A COMPLETE STROKE WITHOUT MOVEMENT
References 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) | 1967-10-20 | 1968-04-20 | 1968-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-10-20 | 1972-04-20 | 1972-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-10-20 | 1976-04-20 | 1976-10-20 | $7700.00 | Window Closed / Lapsed |