US3104589A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic control
Assignee: Flo Tork Inc
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Filing: 1960-11-14
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Granted: 1963-09-24
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Expires: 1980-11-14
Abstract
No abstract record available.
Inventors
- 👤 Edward H Rudd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:11
CPC Classifications
F; F15; F15B; F15B15/00; F15B15/02; F15B15/06; F15B15/065; F15B11/00; F15B11/08; F15B11/12; F15B11/121; F15B11/123
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
207 words
IN A HYDRAULIC ACTUATOR HAVING A ROTATABLE GEAR ELEMENT JOURNALED IN A HOUSING ELEMENT HAVING FIRST AND SECOND PISTON CHAMBERS ON TWO SIDES OF THE GEAR ELEMENT AND FIRST AND SECOND RACK PISTON ELEMENTS IN THE PISTON CHAMBERS AND ENGAGED WITH THE GEAR ELEMENT, THE COMBINATION OF, PASSAGES IN THE HOUSING ELEMENT COMMUNICATING WITH THE CHAMBERS, FLUID ENERGIZED VALVE MEANS FOR CONTROL BY FLUID UNDER PRESSURE APPLIED TO TWO SYSTEMS AND CONNECTED TO THE PASSAGES FOR CONTROLLING THE FLOW OF FLUID UNDER PRESSURE THROUGH SAID PASSAGES, SAID VALVE MEANS HAVING A FIRST POSITION TO CAUSE MOVEMENT OF SAID PISTON ELEMENTS IN SAID CHAMBERS FOR MAXIMUM TRAVEL IN ONE DIRECTION, SAID VALVE MEANS HAVING A SECOND POSITION TO CAUSE MOVEMENT OF SAID PISTON ELEMENTS IN SAID CHAMBER FOR MAXIMUM TRAVEL IN A DIRECTION OPPOSITE TO SAID ONE DIRECTION, SAID VALVE MEANS HAVING A THIRD POSITION TO CAUSE MOVEMENT OF THE SAID PISTON ELEMENTS IN SAID CHAMBERS RESPECTIVELY IN OPPOSITE DIRECTIONS EACH FOR A LESSER AMOUNT OF TRAVEL, AND ONE OF SAID ELEMENTS INCLUDING MEANS FORMING STOPS TO LIMIT THE TRAVEL OF THE PISTON ELEMENTS IN EITHER DIRECTION WHEN THE VALVE MEANS IS IN THE THIRD POSITION TO LIMIT THE PISTON ELEMENT MOVEMENT TO SUCH LESSER AMOUNT OF TRAVEL.
Claim 2
Dependent Claim
207 words
IN A HYDRAULIC ACTUATOR HAVING A ROTATABLE GEAR ELEMENT JOURNALED IN A HOUSING ELEMENT HAVING FIRST AND SECOND PISTON CHAMBERS ON TWO SIDES OF THE GEAR ELEMENT AND FIRST AND SECOND RACK PISTON ELEMENTS IN THE PISTON CHAMBERS AND ENGAGED WITH THE GEAR ELEMENT, THE COMBINATION OF, PASSAGES IN THE HOUSING ELEMENT COMMUNICATING WITH THE CHAMBERS, FLUID ENERGIZED VALVE MEANS FOR CONTROL BY FLUID UNDER PRESSURE APPLIED TO TWO SYSTEMS AND CONNECTED TO THE PASSAGES FOR CONTROLLING THE FLOW OF FLUID UNDER PRESSURE THROUGH SAID PASSAGES, SAID VALVE MEANS HAVING A FIRST POSITION TO CAUSE MOVEMENT OF SAID PISTON ELEMENTS IN SAID CHAMBERS FOR MAXIMUM TRAVEL IN ONE DIRECTION, SAID VALVE MEANS HAVING A SECOND POSITION TO CAUSE MOVEMENT OF SAID PISTON ELEMENTS IN SAID CHAMBER FOR MAXIMUM TRAVEL IN A DIRECTION OPPOSITE TO SAID ONE DIRECTION, SAID VALVE MEANS HAVING A THIRD POSITION TO CAUSE MOVEMENT OF THE SAID PISTON ELEMENTS IN SAID CHAMBERS RESPECTIVELY IN OPPOSITE DIRECTIONS EACH FOR A LESSER AMOUNT OF TRAVEL, AND ONE OF SAID ELEMENTS INCLUDING MEANS FORMING STOPS TO LIMIT THE TRAVEL OF THE PISTON ELEMENTS IN EITHER DIRECTION WHEN THE VALVE MEANS IS IN THE THIRD POSITION TO LIMIT THE PISTON ELEMENT MOVEMENT TO SUCH LESSER AMOUNT OF TRAVEL.
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) | 1966-09-23 | 1967-03-25 | 1967-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-09-23 | 1971-03-25 | 1971-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-09-23 | 1975-03-25 | 1975-09-24 | $7700.00 | Window Closed / Lapsed |