US3249053A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control system for hydraulic pumps and intensifiers
Assignee: Farrel Corp
•
Filing: 1961-10-30
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Granted: 1966-05-03
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Expires: 1981-10-30
Abstract
No abstract record available.
Inventors
- 👤 William L Govan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:58
CPC Classifications
F; F04; F04B; F04B9/00; F04B9/08; F04B9/10; F04B9/109; F04B9/117; F04B9/1172; F01; F01L; F01L23/00; F04B9/111; F04B9/113; F15; F15B; F15B3/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
A FLUID PUMPING SYSTEM INCLUDING AN INTENSIFIER OF TWO OUTPUT FLUID CYLINDERS CONNECTED TO TWO INPUT FLUID CYLINDERS, A REVERSIBLE VARIABLE DISPLACEMENT PUMP, MEANS CONNECTING ONE PUMP DELIVERY PORT TO ONE OF SAID INPUT FLUID CYLINDERS AND THE OTHER PUMP DELIVERY PORT TO THE OTHER OF SAID INPUT FLUID CYLINDERS, MEANS CONNECTING THE OUTPUT PORTS OF SAID OUTPUT FLUID CYLINDERS, PUMP CONTROL MEANS FOR REVERSING AND VARYING THE OUTPUT OF SAID PUMP, A SINGLE CONTROLLER, MEANS CONNECTING THE OUTPUT OF SAID CONTROLLER TO SAID PUMP CONTROL MEANS SO THAT THE OUTPUT OF EACH SAID OUTPUT FLUID CYLINDERS VARIES IN TURN PROPORTIONALLY WITH THE SINGLE CONTROLLER''S OUTPUT.
Claim 2
Dependent Claim
106 words
A FLUID PUMPING SYSTEM INCLUDING AN INTENSIFIER OF TWO OUTPUT FLUID CYLINDERS CONNECTED TO TWO INPUT FLUID CYLINDERS, A REVERSIBLE VARIABLE DISPLACEMENT PUMP, MEANS CONNECTING ONE PUMP DELIVERY PORT TO ONE OF SAID INPUT FLUID CYLINDERS AND THE OTHER PUMP DELIVERY PORT TO THE OTHER OF SAID INPUT FLUID CYLINDERS, MEANS CONNECTING THE OUTPUT PORTS OF SAID OUTPUT FLUID CYLINDERS, PUMP CONTROL MEANS FOR REVERSING AND VARYING THE OUTPUT OF SAID PUMP, A SINGLE CONTROLLER, MEANS CONNECTING THE OUTPUT OF SAID CONTROLLER TO SAID PUMP CONTROL MEANS SO THAT THE OUTPUT OF EACH SAID OUTPUT FLUID CYLINDERS VARIES IN TURN PROPORTIONALLY WITH THE SINGLE CONTROLLER''S OUTPUT.
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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) | 1969-05-02 | 1969-11-01 | 1970-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-02 | 1973-11-01 | 1974-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-02 | 1977-11-01 | 1978-05-03 | $7700.00 | Window Closed / Lapsed |