US3236049A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrostatic transmission
Assignee: Sundstrand Corp
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Filing: 1963-10-24
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Granted: 1966-02-22
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Expires: 1983-10-24
Abstract
No abstract record available.
Inventors
- 👤 Donald B Reinke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:22
CPC Classifications
F; F16; F16H; F16H61/00; F16H61/38; F16H61/40; F16H61/42; F16H61/439; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86574; Y10T137/8667; Y10T137/86694; Y10T137/8671
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
184 words
IN A HYDROSTATIC TRANSMISSION, IN COMBINATION, A VARIABLE DISPLACEMENT AXIAL PISTON PUMP HAVING A REVERSIBLE SWASH PLATE, AN AXIAL PISTON MOTOR, CONDUIT MEANS CONNECTING THE PUMP OUTLET WITH THE MOTOR INLET AND CONNECTING THE MOTOR OUTLET WITH THE PUMP INLET SO THAT THE PUMP SUPPLIES FLUID UNDER PRESSURE TO DRIVE THE MOTOR, HYDRAULIC MEANS FOR VARYING THE DISPLACEMENT OF THE PUMP INCLUDING A SERVO MECHANISM FOR SELECTIVELY POSITIONING THE SWASH PLATE TO VARY THE PUMP DISPLACEMENT AND THEREBY VARY THE SPEED OF THE MOTOR, MEANS BIASING THE DISPLACEMENT MEANS TO A MINIMUM DISPLACEMENT POSITION, MEANS PROVIDING A SOURCE OF CONTROL FLUID UNDER PRESSURE, AND VALVE MEANS CONTROLLING THE FLOW OF FLUID TO AND FROM THE DISPLACEMENT VARYING MEANS INCLUDING A VALVE MEMBER MOVABLE BETWEEN A VALVE OPEN POSITION SUPPLYING CONTROL FLUID UNDER PRESSURE FROM SAID SOURCE TO SAID DISPLACEMENT VARYING MEANS TO ADJUST THE LATTER, A VALVE CLOSED POSITION BLOCKING THE FLOW OF FLUID RELATIVE TO THE DISPLACEMENT VARYING MEANS TO LOCK THE LATTER, AND A NEUTRAL POSITION DRAINING FLUID UNDER PRESSURE FROM THE DISPLACEMENT VARYING MEANS TO POSITION THE PUMP AT MINIMUM DISPLACEMENT.
Claim 2
Dependent Claim
184 words
IN A HYDROSTATIC TRANSMISSION, IN COMBINATION, A VARIABLE DISPLACEMENT AXIAL PISTON PUMP HAVING A REVERSIBLE SWASH PLATE, AN AXIAL PISTON MOTOR, CONDUIT MEANS CONNECTING THE PUMP OUTLET WITH THE MOTOR INLET AND CONNECTING THE MOTOR OUTLET WITH THE PUMP INLET SO THAT THE PUMP SUPPLIES FLUID UNDER PRESSURE TO DRIVE THE MOTOR, HYDRAULIC MEANS FOR VARYING THE DISPLACEMENT OF THE PUMP INCLUDING A SERVO MECHANISM FOR SELECTIVELY POSITIONING THE SWASH PLATE TO VARY THE PUMP DISPLACEMENT AND THEREBY VARY THE SPEED OF THE MOTOR, MEANS BIASING THE DISPLACEMENT MEANS TO A MINIMUM DISPLACEMENT POSITION, MEANS PROVIDING A SOURCE OF CONTROL FLUID UNDER PRESSURE, AND VALVE MEANS CONTROLLING THE FLOW OF FLUID TO AND FROM THE DISPLACEMENT VARYING MEANS INCLUDING A VALVE MEMBER MOVABLE BETWEEN A VALVE OPEN POSITION SUPPLYING CONTROL FLUID UNDER PRESSURE FROM SAID SOURCE TO SAID DISPLACEMENT VARYING MEANS TO ADJUST THE LATTER, A VALVE CLOSED POSITION BLOCKING THE FLOW OF FLUID RELATIVE TO THE DISPLACEMENT VARYING MEANS TO LOCK THE LATTER, AND A NEUTRAL POSITION DRAINING FLUID UNDER PRESSURE FROM THE DISPLACEMENT VARYING MEANS TO POSITION THE PUMP AT MINIMUM DISPLACEMENT.
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) | 1969-02-21 | 1969-08-23 | 1970-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-21 | 1973-08-23 | 1974-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-21 | 1977-08-23 | 1978-02-22 | $7700.00 | Window Closed / Lapsed |