US3128675A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic well pump
Assignee: Individual
•
Filing: 1961-12-01
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Granted: 1964-04-14
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Expires: 1981-12-01
Abstract
No abstract record available.
Inventors
- 👤 Richard O Dulaney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:23
CPC Classifications
F; F03; F03C; F03C1/00; F03C1/02; F01; F01L; F01L25/00; F01L25/02; F01L25/04; F01L25/06; F01L25/063; F03C1/22; F04; F04B; F04B47/00; F04B47/02; F04B47/04; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18056; Y10T74/18184
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
129 words
A HYDRAULIC WELL PUMP COMPRISING A BASE, AN UPSTANDING SAMSON POST ON THE BASE, A GENERALLY HORIZONTAL WALKING BEAM PIVOTED INTERMEDIATE ITS ENDS ON THE POST, A WELL STRING SECURED TO ONE END OF THE WALKING BEAM, A COUNTERBALANCE WEIGHT SECURED ON THE OTHER END OF THE WALKING BEAM, VERTICALLY EXTENSIBLE AND CONTRACTIBLE HYDRAULIC RAMS PIVOTED TO THE WALKING BEAM AT OPPOSITE SIDES OF THE SAMSON POST AND PIVOTED ON THE BASE, DISTRIBUTING VALVE MEANS CONNECTED BETWEEN THE RAMS, A VERTICALLY EXTENSIBLE AND CONTRACTIBLE HYDRAULIC VALVE OPERATOR PIVOTED TO THE WALKING BEAM AT ONE SIDE OF SAID POST AND PIVOTED ON SAID POST, A HYDRAULIC RETURN LINE CONNECTED TO THE DISTRIBUTING VALVE MEANS AND TO THE VALVE OPERATOR, AND A FLUID PRESSURE LINE LEADING TO THE DISTRIBUTING VALVE MEANS.
Claim 2
Dependent Claim
129 words
A HYDRAULIC WELL PUMP COMPRISING A BASE, AN UPSTANDING SAMSON POST ON THE BASE, A GENERALLY HORIZONTAL WALKING BEAM PIVOTED INTERMEDIATE ITS ENDS ON THE POST, A WELL STRING SECURED TO ONE END OF THE WALKING BEAM, A COUNTERBALANCE WEIGHT SECURED ON THE OTHER END OF THE WALKING BEAM, VERTICALLY EXTENSIBLE AND CONTRACTIBLE HYDRAULIC RAMS PIVOTED TO THE WALKING BEAM AT OPPOSITE SIDES OF THE SAMSON POST AND PIVOTED ON THE BASE, DISTRIBUTING VALVE MEANS CONNECTED BETWEEN THE RAMS, A VERTICALLY EXTENSIBLE AND CONTRACTIBLE HYDRAULIC VALVE OPERATOR PIVOTED TO THE WALKING BEAM AT ONE SIDE OF SAID POST AND PIVOTED ON SAID POST, A HYDRAULIC RETURN LINE CONNECTED TO THE DISTRIBUTING VALVE MEANS AND TO THE VALVE OPERATOR, AND A FLUID PRESSURE LINE LEADING TO THE DISTRIBUTING VALVE MEANS.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-04-14 | 1967-10-14 | 1968-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-14 | 1971-10-14 | 1972-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-14 | 1975-10-14 | 1976-04-14 | $7700.00 | Window Closed / Lapsed |