US3714845A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydromechanical transmission
Assignee: Motors Liquidation Co
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Filing: 1971-08-24
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Granted: 1973-02-06
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Expires: 1991-08-24
Abstract
Abstract A hydromechanical transmission having a variable ratio hydrostatic drive unit, two planetary gear sets and three friction drive establishing devices combined to provide an allhydrostatic drive in a low speed range in both forward and reverse and split power or hydromechanical drives into higher speed ranges in forward.
Inventors
- 👤 J Mooney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:56
CPC Classifications
F; F16; F16H; F16H47/00; F16H47/02; F16H47/04; F16H37/00; F16H37/02; F16H37/06; F16H37/08; F16H37/0833; F16H37/084; F16H2037/088; F16H2037/0886; F16H37/10; F16H2037/105; F16H2037/107
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
288 words
A hydromechanical transmission comprising an input shaft; an output shaft; a variable ratio hydrostatic drive unit having an input member drivingly connected to said input shaft and also having a variable speed Output member; a first and a second planetary gear set each having a sun gear member, a ring gear member and a carrier member carrying a pinion meshing with the sun and ring gear members; one member of said first gear set, one member of said second gear set and said variable speed output member all being drivingly connected; another member of said first gear set, another member of said second gear set and said output shaft all being drivingly connected; first drive train means including first drive establishing means for selectively drivingly connecting said variable speed output member and said output shaft to provide a first speed ratio drive between said input shaft and said output shaft; second drive train means including second drive establishing means for selectively drivingly connecting said input shaft and the third member of said first gear set to provide a second speed ratio drive between said input shaft and said output shaft with the drive establishment occurring at a speed synchronous condition in said second drive establishing means at predetermined speed ratio between said input shaft and said output shaft; and third drive train means including third drive establishing means for selectively drivingly connecting said input shaft and the third member of said second gear set to provide a third speed ratio drive between said input shaft and said output shaft with the drive establishment occurring at a speed synchronous condition in said third drive establishing means at another predetermined speed ratio between said input shaft and said output shaft.
Claim 2
Dependent Claim
288 words
A hydromechanical transmission comprising an input shaft; an output shaft; a variable ratio hydrostatic drive unit having an input member drivingly connected to said input shaft and also having a variable speed Output member; a first and a second planetary gear set each having a sun gear member, a ring gear member and a carrier member carrying a pinion meshing with the sun and ring gear members; one member of said first gear set, one member of said second gear set and said variable speed output member all being drivingly connected; another member of said first gear set, another member of said second gear set and said output shaft all being drivingly connected; first drive train means including first drive establishing means for selectively drivingly connecting said variable speed output member and said output shaft to provide a first speed ratio drive between said input shaft and said output shaft; second drive train means including second drive establishing means for selectively drivingly connecting said input shaft and the third member of said first gear set to provide a second speed ratio drive between said input shaft and said output shaft with the drive establishment occurring at a speed synchronous condition in said second drive establishing means at predetermined speed ratio between said input shaft and said output shaft; and third drive train means including third drive establishing means for selectively drivingly connecting said input shaft and the third member of said second gear set to provide a third speed ratio drive between said input shaft and said output shaft with the drive establishment occurring at a speed synchronous condition in said third drive establishing means at another predetermined speed ratio between said input shaft and said output shaft.
Claim 3
Dependent Claim
288 words
A hydromechanical transmission comprising an input shaft; an output shaft; a variable ratio hydrostatic drive unit having an input member drivingly connected to said input shaft and also having a variable speed Output member; a first and a second planetary gear set each having a sun gear member, a ring gear member and a carrier member carrying a pinion meshing with the sun and ring gear members; one member of said first gear set, one member of said second gear set and said variable speed output member all being drivingly connected; another member of said first gear set, another member of said second gear set and said output shaft all being drivingly connected; first drive train means including first drive establishing means for selectively drivingly connecting said variable speed output member and said output shaft to provide a first speed ratio drive between said input shaft and said output shaft; second drive train means including second drive establishing means for selectively drivingly connecting said input shaft and the third member of said first gear set to provide a second speed ratio drive between said input shaft and said output shaft with the drive establishment occurring at a speed synchronous condition in said second drive establishing means at predetermined speed ratio between said input shaft and said output shaft; and third drive train means including third drive establishing means for selectively drivingly connecting said input shaft and the third member of said second gear set to provide a third speed ratio drive between said input shaft and said output shaft with the drive establishment occurring at a speed synchronous condition in said third drive establishing means at another predetermined speed ratio between said input shaft and said output shaft.
Claim 4
Dependent Claim
288 words
A hydromechanical transmission comprising an input shaft; an output shaft; a variable ratio hydrostatic drive unit having an input member drivingly connected to said input shaft and also having a variable speed Output member; a first and a second planetary gear set each having a sun gear member, a ring gear member and a carrier member carrying a pinion meshing with the sun and ring gear members; one member of said first gear set, one member of said second gear set and said variable speed output member all being drivingly connected; another member of said first gear set, another member of said second gear set and said output shaft all being drivingly connected; first drive train means including first drive establishing means for selectively drivingly connecting said variable speed output member and said output shaft to provide a first speed ratio drive between said input shaft and said output shaft; second drive train means including second drive establishing means for selectively drivingly connecting said input shaft and the third member of said first gear set to provide a second speed ratio drive between said input shaft and said output shaft with the drive establishment occurring at a speed synchronous condition in said second drive establishing means at predetermined speed ratio between said input shaft and said output shaft; and third drive train means including third drive establishing means for selectively drivingly connecting said input shaft and the third member of said second gear set to provide a third speed ratio drive between said input shaft and said output shaft with the drive establishment occurring at a speed synchronous condition in said third drive establishing means at another predetermined speed ratio between said input shaft and said output shaft.
Claim 5
Dependent Claim
231 words
A hydromechanical transmission comprising an input shaft; and output shaft; a variable ratio hydrostatic drive unit having an input member drivingly connected to said input shaft and also having a variable speed output member; a first and a second planetary gear set each having a sun gear member, a ring gear member and a carrier member carrying a pinion meshing with the sun and ring gear members; one member of said first gear set, one member of said second gear set and said variable speed output member all being drivingly connected; another member of said first gear set, another member of said second gear set and said output shaft all being drivingly connected; first drive train means including first drive establishing means for selectively drivingly connecting said variable speed output member and said output shaft to provide a first speed ratio drive between said input shaft and said output shaft; second drive train means including second drive establishing means for selectively drivingly connecting said input shaft and the third member of said first gear set to provide a second speed ratio drive between said input shaft and said output shaft; and third drive train means including third drive establishing means for selectively drivingly connecting said input shaft and the third member of said second gear set to provide a third speed ratio drive between said input shaft and said output shaft.
Claim 6
Dependent Claim
231 words
A hydromechanical transmission comprising an input shaft; and output shaft; a variable ratio hydrostatic drive unit having an input member drivingly connected to said input shaft and also having a variable speed output member; a first and a second planetary gear set each having a sun gear member, a ring gear member and a carrier member carrying a pinion meshing with the sun and ring gear members; one member of said first gear set, one member of said second gear set and said variable speed output member all being drivingly connected; another member of said first gear set, another member of said second gear set and said output shaft all being drivingly connected; first drive train means including first drive establishing means for selectively drivingly connecting said variable speed output member and said output shaft to provide a first speed ratio drive between said input shaft and said output shaft; second drive train means including second drive establishing means for selectively drivingly connecting said input shaft and the third member of said first gear set to provide a second speed ratio drive between said input shaft and said output shaft; and third drive train means including third drive establishing means for selectively drivingly connecting said input shaft and the third member of said second gear set to provide a third speed ratio drive between said input shaft and said output shaft.
Claim 7
Dependent Claim
230 words
A hydromechanical transmission comprising an input shaft; an output shaft; a variable ratio hydrostatic drive unit having an input member drivingly connected to said input shaft and also having a variable speed output member; a first and a second planetary gear set each having a sun gear, a ring gear and a carrier carrying a pinion meshing with the sun gear and ring gear; the ring gear of said first gear set, the carrier of said second gear set and said variable speed output member all being drivingly connected; the sun gear of said first gear set, the ring gear of said second gear set and said output shaft all being drivingly connected; first drive train means including first drive establishing means for selectively drivingly connecting said variable speed output member and said output shaft to provide a first speed ratio drive between said input shaft and said output shaft; second drive train means including second drive establishing means for selectively drivingly connecting said input shaft and the carrier of saiD first gear set to provide a second speed ratio drive between said input shaft and said output shaft; and third drive train means including third drive establishing means for selectively drivingly connecting said input shaft and the sun gear of said second gear set to provide a third speed ratio drive between said input shaft and said output shaft.
Claim 8
Dependent Claim
230 words
A hydromechanical transmission comprising an input shaft; an output shaft; a variable ratio hydrostatic drive unit having an input member drivingly connected to said input shaft and also having a variable speed output member; a first and a second planetary gear set each having a sun gear, a ring gear and a carrier carrying a pinion meshing with the sun gear and ring gear; the ring gear of said first gear set, the carrier of said second gear set and said variable speed output member all being drivingly connected; the sun gear of said first gear set, the ring gear of said second gear set and said output shaft all being drivingly connected; first drive train means including first drive establishing means for selectively drivingly connecting said variable speed output member and said output shaft to provide a first speed ratio drive between said input shaft and said output shaft; second drive train means including second drive establishing means for selectively drivingly connecting said input shaft and the carrier of saiD first gear set to provide a second speed ratio drive between said input shaft and said output shaft; and third drive train means including third drive establishing means for selectively drivingly connecting said input shaft and the sun gear of said second gear set to provide a third speed ratio drive between said input shaft and said output shaft.
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) | 1976-02-06 | 1976-08-07 | 1977-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-06 | 1980-08-07 | 1981-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-06 | 1984-08-07 | 1985-02-06 | $7700.00 | Window Closed / Lapsed |