Patent US3177665A successfully refreshed from Google Patents.
US3177665A
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Hydrostatic transmission
Assignee: Sundstrand Corp
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Filing: 1963-11-20
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Granted: 1965-04-13
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Expires: 1983-11-20
Abstract
No abstract record available.
Inventors
- 👤 Russell L Power
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:54
CPC Classifications
F; F16; F16H; F16H39/00; F16H39/02; Y; Y10; Y10S; Y10S60/00; Y10S60/912; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2564; Y10T137/2703
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
169 words
IN A HYDROSTATIC TRANSMISSION, A FIRST PUMP HAVING AN INLET AND AN OUTLET; A MOTOR HAVING AN INLET AND AN OUTLET; A FIRST CONDUIT CONNECTING THE FIRST PUMP OUTLET AND THE MOTOR INLET SO THAT THE FIRST PUMP DELIVERS FLUID UNDER PRESSURE TO DRIVE THE MOTOR; A SECOND CONDUIT CONNECTING THE MOTOR OUTLET AND THE FIRST PUMP INLET SO THAT THE MOTOR RETURNS FLUID TO THE FIRST PUMP; A MAKEUP PUMP FOR SUPPLYING MAKEUP AND COOLING FLUID; A MAKEUP CONDUIT LEADING FROM THE MAKEUP PUMP; A VALVE MEMBER CONTROLLING COMMUNICATION BETWEEN THE MAKEUP CONDUIT AND THE FIRST AND SECOND CONDUITS AND RESPONSIVE TO PRESSURE IN THE HIGHER PRESSURE CONDUIT OF THE FIRST AND SECOND CONDUITS TO CONNECT THE MAKEUP CONDUIT TO THE LOWER PRESSURE CONDUIT OF THE FIRST AND SECOND CONDUITS FOR DELIVERING MAKEUP AND COOLING FLUID TO THE LOWER PRESSURE CONDUIT; A HEATED FLUID DISCHARGE CONDUIT; AND VALVING ON SAID VALVE MEMBER FOR CONNECTING THE LOWER PRESSURE CONDUIT TO THE HEATED FLUID DISCHARGE CONDUIT FOR WITHDRAWING HEATED FLUID.
Claim 2
Dependent Claim
169 words
IN A HYDROSTATIC TRANSMISSION, A FIRST PUMP HAVING AN INLET AND AN OUTLET; A MOTOR HAVING AN INLET AND AN OUTLET; A FIRST CONDUIT CONNECTING THE FIRST PUMP OUTLET AND THE MOTOR INLET SO THAT THE FIRST PUMP DELIVERS FLUID UNDER PRESSURE TO DRIVE THE MOTOR; A SECOND CONDUIT CONNECTING THE MOTOR OUTLET AND THE FIRST PUMP INLET SO THAT THE MOTOR RETURNS FLUID TO THE FIRST PUMP; A MAKEUP PUMP FOR SUPPLYING MAKEUP AND COOLING FLUID; A MAKEUP CONDUIT LEADING FROM THE MAKEUP PUMP; A VALVE MEMBER CONTROLLING COMMUNICATION BETWEEN THE MAKEUP CONDUIT AND THE FIRST AND SECOND CONDUITS AND RESPONSIVE TO PRESSURE IN THE HIGHER PRESSURE CONDUIT OF THE FIRST AND SECOND CONDUITS TO CONNECT THE MAKEUP CONDUIT TO THE LOWER PRESSURE CONDUIT OF THE FIRST AND SECOND CONDUITS FOR DELIVERING MAKEUP AND COOLING FLUID TO THE LOWER PRESSURE CONDUIT; A HEATED FLUID DISCHARGE CONDUIT; AND VALVING ON SAID VALVE MEMBER FOR CONNECTING THE LOWER PRESSURE CONDUIT TO THE HEATED FLUID DISCHARGE CONDUIT FOR WITHDRAWING HEATED FLUID.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-04-12 | 1968-10-12 | 1969-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-12 | 1972-10-12 | 1973-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-12 | 1976-10-12 | 1977-04-13 | $7700.00 | Window Closed / Lapsed |