Patent US3094842A successfully refreshed from Google Patents.
US3094842A
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Hydraulic pumping system
Assignee: Individual
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Filing: 1961-04-21
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Granted: 1963-06-25
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Expires: 1981-04-21
Abstract
No abstract record available.
Inventors
- 👤 Rufus B Johnston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:31
CPC Classifications
F; F04; F04B; F04B9/00; F04B9/08; F04B9/10; F04B9/109; F04B9/117; F04B9/1176; F04B9/1178; F01; F01L; F01L25/00; F01L25/02; F01L25/04; F01L25/06; F01L25/066; F04B47/00; F04B47/02; F04B47/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
AN HYDRAULIC PUMPING SYSTEM, COMPRISING A PAIR OF CYLINDERS EACH HAVING A PISTON RECIPROCABLE THEREIN, A ROD EXTENDING FROM EACH PISTON THROUGH THE CYLINDER FOR CONNECTION TO A LOAD TO BE RAISED, A BALANCE LINE FLUIDLY CONNECTING THE CYLINDERS TO ONE ANOTHER BELOW THE PISTONS, MEANS SHIFTABLE BETWEEN POSITIONS FOR ALTERNATELY DELIVERING HYDRAULIC FLUID TO THE UPPER END OF ONE PISTON WHILE EXHAUSTING IT FROM THE UPPER END OF THE OTHER PISTON SO AS TO RECIPROCATE THE PISTONS IN OPPOSITE DIRECTIONS, A FIRST LINE CONNECTING WITH THE ONE CYLINDER BELOW THE UPPER
Claim 2
Dependent Claim
92 words
AN HYDRAULIC PUMPING SYSTEM, COMPRISING A PAIR OF CYLINDERS EACH HAVING A PISTON RECIPROCABLE THEREIN, A ROD EXTENDING FROM EACH PISTON THROUGH THE CYLINDER FOR CONNECTION TO A LOAD TO BE RAISED, A BALANCE LINE FLUIDLY CONNECTING THE CYLINDERS TO ONE ANOTHER BELOW THE PISTONS, MEANS SHIFTABLE BETWEEN POSITIONS FOR ALTERNATELY DELIVERING HYDRAULIC FLUID TO THE UPPER END OF ONE PISTON WHILE EXHAUSTING IT FROM THE UPPER END OF THE OTHER PISTON SO AS TO RECIPROCATE THE PISTONS IN OPPOSITE DIRECTIONS, A FIRST LINE CONNECTING WITH THE ONE CYLINDER BELOW THE UPPER
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) | 1966-06-24 | 1966-12-24 | 1967-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-06-24 | 1970-12-24 | 1971-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-06-24 | 1974-12-24 | 1975-06-25 | $7700.00 | Window Closed / Lapsed |