US3213619A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrostatic transmission
Assignee: Ford Motor Co
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Filing: 1964-04-22
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Granted: 1965-10-26
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Expires: 1984-04-22
Abstract
No abstract record available.
Inventors
- 👤 John P Creighton
- 👤 Harris Dennis
- 👤 Slimm Victor Ray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:57
CPC Classifications
F; F16; F16H; F16H61/00; F16H61/38; F16H61/40; F16H61/42; F16H61/437; F16H39/00; F16H39/04; F16H39/06; F16H39/08; F16H39/10; F16H39/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
218 words
IN A HYDROSTATIC UNIT HAVING A BODY MOUNTED FOR ROTATION ABOUT A FIRST AXIS, CYLINDERS IN SAID BODY ARRANGED ON AXES PARALLEL TO SAID FIRST AXIS, PISTON IN EACH CYLINDER COOPERATING THEREWITH TO DEFINE A FLUID PRESSURE WORKING CHANBER, A SWACHPLATE HAVING A SURFACE DISPOSED AT AN ACUTE ANGLE WITH RESPECT TO SAID FIRST AXIS, SAID PISTONS BEING ENGAGEABLE WITH SAID SURFACE AND MOVABLE WITHIN SAID CYLINDER UPON ROTATION OF SAID BODY BETWEEN A TOP DEAD CENTER POSITION AND A BOTTOM DEAD CENTER POSITION, A VALVE PLATE ENGAGEABLE WITH SAID BODY, ARCUATE HIGH AND LOW PRESSURE PORTS IN SAID VAVLE PLATE IN COMMUNICATION WITH SAID WORKING CHANBERS, SAID PORTS BEING SPACED APART BY ARCS EXTENDING ACROSS THE TOP OF BOTTOM DEAD CENTER PISITIONS, EACH ARC BEIONG LONGER THAN THE DIAMETER OF A CYLINDER, A PASSAGE EXTENDING FROM ONE OF SAID PORTS TO A POINT ON A VALUE PLATE ARC BETWEEN A LOCATION CORRESPONDING TO A DEAD CENTER POSITIN AND THE ADJACENT END OF SAID ONE PORT WHEREBY BY THE PRESSURE IN SAID WORKING CHAMBERS IS CHANGED AS THE CORRESPONDING CYLINDERS PASS OVER SAID ADJACENT END OF SAID ONE PRESSURE PORT, SAID PRESSURE CHANGING APPROXIMATELY LINEARLY OVER APPROXIMATELY $/N RADIANS, WHERE N IS THE NUMBER OF CYLINDERS, AND THE PRESSURE IN EACH CYLINDER AT EACH DEAD CENTER POSITION BEING
Claim 2
Dependent Claim
218 words
IN A HYDROSTATIC UNIT HAVING A BODY MOUNTED FOR ROTATION ABOUT A FIRST AXIS, CYLINDERS IN SAID BODY ARRANGED ON AXES PARALLEL TO SAID FIRST AXIS, PISTON IN EACH CYLINDER COOPERATING THEREWITH TO DEFINE A FLUID PRESSURE WORKING CHANBER, A SWACHPLATE HAVING A SURFACE DISPOSED AT AN ACUTE ANGLE WITH RESPECT TO SAID FIRST AXIS, SAID PISTONS BEING ENGAGEABLE WITH SAID SURFACE AND MOVABLE WITHIN SAID CYLINDER UPON ROTATION OF SAID BODY BETWEEN A TOP DEAD CENTER POSITION AND A BOTTOM DEAD CENTER POSITION, A VALVE PLATE ENGAGEABLE WITH SAID BODY, ARCUATE HIGH AND LOW PRESSURE PORTS IN SAID VAVLE PLATE IN COMMUNICATION WITH SAID WORKING CHANBERS, SAID PORTS BEING SPACED APART BY ARCS EXTENDING ACROSS THE TOP OF BOTTOM DEAD CENTER PISITIONS, EACH ARC BEIONG LONGER THAN THE DIAMETER OF A CYLINDER, A PASSAGE EXTENDING FROM ONE OF SAID PORTS TO A POINT ON A VALUE PLATE ARC BETWEEN A LOCATION CORRESPONDING TO A DEAD CENTER POSITIN AND THE ADJACENT END OF SAID ONE PORT WHEREBY BY THE PRESSURE IN SAID WORKING CHAMBERS IS CHANGED AS THE CORRESPONDING CYLINDERS PASS OVER SAID ADJACENT END OF SAID ONE PRESSURE PORT, SAID PRESSURE CHANGING APPROXIMATELY LINEARLY OVER APPROXIMATELY $/N RADIANS, WHERE N IS THE NUMBER OF CYLINDERS, AND THE PRESSURE IN EACH CYLINDER AT EACH DEAD CENTER POSITION BEING
References Cited (Backward Citations)
US2619041A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-10-25 | 1969-04-26 | 1969-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-25 | 1973-04-26 | 1973-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-25 | 1977-04-26 | 1977-10-26 | $7700.00 | Window Closed / Lapsed |