US3575066A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transmission
Assignee: Motors Liquidation Co
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Filing: 1969-09-23
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Granted: 1971-04-13
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Expires: 1989-09-23
Abstract
Abstract A transmission having a hydrostatic propulsion drive unit combined with planetary gearing to provide in both forward and reverse a full hydrostatic drive in a low-speed range and two different hydromechanical drives in successively higher speed ranges with synchronous drive-establishing device shifting, the transmission with dual output also having a separate hydrostatic steer drive unit combined with the gearing to provide steering. The invention herein described was made in the course of work under a contract or subcontract thereunder with the Department of the Army.
Inventors
- 👤 William G Livezey
- 👤 James J Mooney Jr
- 👤 William V Phillips
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:28
CPC Classifications
F; F16; F16H; F16H47/00; F16H47/02; F16H47/04; B; B62; B62D; B62D11/00; B62D11/02; B62D11/06; B62D11/10; B62D11/14; B62D11/18; F16H37/00; F16H37/02; F16H37/06; F16H37/08; F16H37/0833; F16H37/084; F16H2037/088; F16H2037/0886; F16H2047/045
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
328 words
In a transmission the combination of an input shaft; an output shaft; variable spEed ratio hydrostatic drive means drivingly connected to said input shaft; first and second planetary gear means drivingly connected to each other and to said hydrostatic drive means; third planetary gear means drivingly connected to said first planetary gear means, said second planetary gear means and said output shaft; selectively operable first drive-establishing means for selectively providing reaction in both said first planetary gear means and said third planetary gear means to establish a drive from said hydrostatic drive means through said first planetary gear means and then through said third planetary gear means to said output shaft to provide a low-speed range drive between said input shaft and said output shaft; first mechanical drive train means including selectively operable second drive-establishing means for selectively drivingly connecting said input shaft to both said first planetary gear means and said third planetary gear means to establish a hydromechanical drive from first planetary gear means to said third planetary gear means and also a mechanical drive from said input shaft to said third planetary gear means with said third planetary gear means combining the hydromechanical drive and mechanical drive to drive said output shaft to provide an intermediate speed range drive between said input shaft and said output shaft; and second mechanical drive train means including third drive-establishing means for selectively drivingly connecting said input shaft to said second planetary gear means to establish a hydromechanical drive from said second planetary gear means to said third planetary gear means and also a hydromechanical drive from said first planetary gear means to said third planetary gear means with said third planetary combining these two hydromechanical drives to drive said output shaft to provide a high-speed range drive between said input shaft and said output shaft and whereby the speed ratio in all said speed range drives is varied by varying the speed ratio of said hydrostatic drive means.
Claim 2
Dependent Claim
328 words
In a transmission the combination of an input shaft; an output shaft; variable spEed ratio hydrostatic drive means drivingly connected to said input shaft; first and second planetary gear means drivingly connected to each other and to said hydrostatic drive means; third planetary gear means drivingly connected to said first planetary gear means, said second planetary gear means and said output shaft; selectively operable first drive-establishing means for selectively providing reaction in both said first planetary gear means and said third planetary gear means to establish a drive from said hydrostatic drive means through said first planetary gear means and then through said third planetary gear means to said output shaft to provide a low-speed range drive between said input shaft and said output shaft; first mechanical drive train means including selectively operable second drive-establishing means for selectively drivingly connecting said input shaft to both said first planetary gear means and said third planetary gear means to establish a hydromechanical drive from first planetary gear means to said third planetary gear means and also a mechanical drive from said input shaft to said third planetary gear means with said third planetary gear means combining the hydromechanical drive and mechanical drive to drive said output shaft to provide an intermediate speed range drive between said input shaft and said output shaft; and second mechanical drive train means including third drive-establishing means for selectively drivingly connecting said input shaft to said second planetary gear means to establish a hydromechanical drive from said second planetary gear means to said third planetary gear means and also a hydromechanical drive from said first planetary gear means to said third planetary gear means with said third planetary combining these two hydromechanical drives to drive said output shaft to provide a high-speed range drive between said input shaft and said output shaft and whereby the speed ratio in all said speed range drives is varied by varying the speed ratio of said hydrostatic drive means.
Claim 3
Dependent Claim
195 words
The transmission set forth in claim 1 and each said planetary gear means comprising a sun gear, a ring gear and a carrier carrying a pinion in mesh with said sun gear and said ring gear; the sun gear of both said first and second planetary gear means drivingly connected to said hydrostatic drive means; the ring gears of said first and third planetary gear means and the carrier of said second planetary gear means all being drivingly connected; the carrier of said first planetary gear means drivingly connected to the sun gear of said third planetary gear means; the carrier of said third planetary gear means drivingly connected to said output shaft; said first drive-establishing means comprising a brake operatively connected to the ring gears of said first and third planetary gear means; said second drive-establishing means comprising a clutch which is operable to drivingly connect said input shaft to the carrier of said first planetary gear means and the sun gear of said third planetary gear means; said third drive-establishing means comprising a clutch which is operable to drivingly connect said input shaft to the ring gear of said second planetary gear means.
Claim 4
Dependent Claim
33 words
The transmission set forth in claim 1 and forward and reverse drive means for selectively providing a forward drive and a reverse drive between said input shaft and both said mechanical drive means.
Claim 5
Dependent Claim
174 words
The transmission set forth in claim 3 and a pair of steer planetary gear means each having a sun gear member, a ring gear member and a carrier member carrying a pinion meshing with said sun gear member and said ring gear member; means drivingly connecting said output shaft to one pair of like members of said steer planetary gear means; direction reversing gear train means operatively connecting another pair of like members of said steer planetary gear means; variable speed ratio steer hydrostatic drive means for operatively drivingly connecting said input shaft to said another pair of likE members of said steer planetary gear means whereby the remaining pair of like members, of said steer planetary gear means provide two output drives having equal speed on establishment of said speed range drives with a differential speed effected between said output drives to produce steering whenever said steer hydrostatic drive means drives said direction reversing gear train wherein said differential speed is varied by varying the speed ratio of said steer hydrostatic drive means.
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) | 1974-04-12 | 1974-10-12 | 1975-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-12 | 1978-10-12 | 1979-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-12 | 1982-10-12 | 1983-04-13 | $7700.00 | Window Closed / Lapsed |