US3763718A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydromechanical transmission
Assignee: Motors Liquidation Co
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Filing: 1972-07-28
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Granted: 1973-10-09
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Expires: 1992-07-28
Abstract
Abstract A hydromechanical transmission providing a hydrostatic drive in low range and a hydromechanical drive in high range. The output of the hydrostatic portion drives a pair of clutches, one of which is selectively engageable to provide a drive to the transmission output and the other is selectively engageable to provide an input to a planetary gear set which combines the hydrostatic drive with a mechanical input which combined drive is directed to the transmission output. The shift point for the interchange of the clutches occurs at a synchronous speed point.
Inventors
- 👤 R Tipping
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:34
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; F16H2037/106
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
229 words
A hydromechanical transmission comprising in combination, input means for providing a drive thereto; output means for providing a drive therefrom; variable ratio hydrostatic transmission means drivingly connected with said input means being operable to provide infinitely variable ratios within a range of ratios; and drive means for transmitting drives from said input means and said hydrostatic transmission to said output means including first selectively engageable and disengageable clutch means having an input member drivingly connected with said hydrostatic transmission and an output member, gear reduction means drivingly connected between said first clutch means output member and said output means, second selectively engageable and disengageable clutch means having an input member drivingly connected with said hydrostatic transmission and an output member, and planetary gear means having a first planetary member drivingly connected with said second clutch means output member, a second planetary member drivingly connected with said input means, and a third planetary member drivingly connected with said output means; said first and second clutch means being selectively and synchronously interchangeable at a predetermined ratio in said hydrostatic transmission to provide a hydrostatic drive between said input and output means when said first clutch means is engaged and said second clutch means is disengaged and to provide a hyDromechanical drive between said input and output means when said second clutch means is engaged and said first clutch means is disengaged.
Claim 2
Dependent Claim
229 words
A hydromechanical transmission comprising in combination, input means for providing a drive thereto; output means for providing a drive therefrom; variable ratio hydrostatic transmission means drivingly connected with said input means being operable to provide infinitely variable ratios within a range of ratios; and drive means for transmitting drives from said input means and said hydrostatic transmission to said output means including first selectively engageable and disengageable clutch means having an input member drivingly connected with said hydrostatic transmission and an output member, gear reduction means drivingly connected between said first clutch means output member and said output means, second selectively engageable and disengageable clutch means having an input member drivingly connected with said hydrostatic transmission and an output member, and planetary gear means having a first planetary member drivingly connected with said second clutch means output member, a second planetary member drivingly connected with said input means, and a third planetary member drivingly connected with said output means; said first and second clutch means being selectively and synchronously interchangeable at a predetermined ratio in said hydrostatic transmission to provide a hydrostatic drive between said input and output means when said first clutch means is engaged and said second clutch means is disengaged and to provide a hyDromechanical drive between said input and output means when said second clutch means is engaged and said first clutch means is disengaged.
Claim 3
Dependent Claim
264 words
A hydromechanical transmission comprising in combination, input means for providing a drive thereto; output means for providing a drive therefrom; variable ratio hydrostatic transmission means drivingly connected with said input means being operable to provide infinitely variable ratios within a range of ratios; drive means for transmitting drives from said input means and said hydrostatic transmission to said output means including first selectively engageable and disengageable clutch means having an input member drivingly connected with said hydrostatic transmission and an output member, gear reduction means drivingly connected between said first clutch means output member and said output means, second selectively engageable and disengageable clutch means having an input member drivingly connected with said hydrostatic transmission and an output member, and planetary gear means having a sun gear drivingly connected with said second clutch means output member, a planet carrier drivingly connected with said input means, and a ring gear drivingly connected with said output means; and third clutch means selectively engageable between said hydrostatic transmission and said output means in parallel with a portion of said gear reduction means for providing a high speed-low torque reverse drive ratio between said input and output means; said first and second clutch means being selectively and synchronously interchangeable at a predetermined ratio in said hydrostatic transmission to provide a hydrostatic drive between said input and output means when said first clutch means is engaged and said second clutch means is disengaged, and to provide a hydromechanical drive between said input and output means when said second clutch means is engaged and said first clutch means is disengaged.
Claim 4
Dependent Claim
264 words
A hydromechanical transmission comprising in combination, input means for providing a drive thereto; output means for providing a drive therefrom; variable ratio hydrostatic transmission means drivingly connected with said input means being operable to provide infinitely variable ratios within a range of ratios; drive means for transmitting drives from said input means and said hydrostatic transmission to said output means including first selectively engageable and disengageable clutch means having an input member drivingly connected with said hydrostatic transmission and an output member, gear reduction means drivingly connected between said first clutch means output member and said output means, second selectively engageable and disengageable clutch means having an input member drivingly connected with said hydrostatic transmission and an output member, and planetary gear means having a sun gear drivingly connected with said second clutch means output member, a planet carrier drivingly connected with said input means, and a ring gear drivingly connected with said output means; and third clutch means selectively engageable between said hydrostatic transmission and said output means in parallel with a portion of said gear reduction means for providing a high speed-low torque reverse drive ratio between said input and output means; said first and second clutch means being selectively and synchronously interchangeable at a predetermined ratio in said hydrostatic transmission to provide a hydrostatic drive between said input and output means when said first clutch means is engaged and said second clutch means is disengaged, and to provide a hydromechanical drive between said input and output means when said second clutch means is engaged and said first clutch means is disengaged.
Claim 5
Dependent Claim
224 words
A hydromechanical transmission comprising in combination, input means for providing an input drive thereto; output means for providing a drive therefrom; variable ratio hydrostatic transmission means drivingly connected with said input means being operable to provide infinitely variable ratios within a range of ratios; and drive means for transmitting drives from said input means to said output means including first selectively engageable and disengageable clutch means having an input member drivingly connected with said hydrostatic transmission and an output member, gear reduction means drivingly connected between said first clutch means output member and said output means, second selectively engageable and disengageable clutch means having an input member drivingly connected with said hydrostatic transmission and an output member, and planetary gear means having a sun gear drivingly connected with said second clutch means output member, a planetary carrier continuously drivingly connected with said input means, and a ring gear drivingly connected with said output means; said first and second clutch means being selectively and synchronously interchangeable at a predetermined ratio in said hydrostatic transmission to provide a hydrostatic drive between said input and output means when said first clutch means is engaged and said second clutch means is disengaged, and to provide a hydromechanical drive between said input and output means when said second clutch means is engaged and said first clutch means is disengaged.
Claim 6
Dependent Claim
224 words
A hydromechanical transmission comprising in combination, input means for providing an input drive thereto; output means for providing a drive therefrom; variable ratio hydrostatic transmission means drivingly connected with said input means being operable to provide infinitely variable ratios within a range of ratios; and drive means for transmitting drives from said input means to said output means including first selectively engageable and disengageable clutch means having an input member drivingly connected with said hydrostatic transmission and an output member, gear reduction means drivingly connected between said first clutch means output member and said output means, second selectively engageable and disengageable clutch means having an input member drivingly connected with said hydrostatic transmission and an output member, and planetary gear means having a sun gear drivingly connected with said second clutch means output member, a planetary carrier continuously drivingly connected with said input means, and a ring gear drivingly connected with said output means; said first and second clutch means being selectively and synchronously interchangeable at a predetermined ratio in said hydrostatic transmission to provide a hydrostatic drive between said input and output means when said first clutch means is engaged and said second clutch means is disengaged, and to provide a hydromechanical drive between said input and output means when said second clutch means is engaged and said first clutch means is disengaged.
Claim 7
Dependent Claim
258 words
A hydromechanical transmission comprising; input means; output means; variable ratio hydraulic transmission means including pump means drivingly connected with said input means, motor means in fluid communication with said pump means, and an output member drivingly connected with said motor means; drive reduction gear means including a first reduction gear member drivingly connected with said output member, cluster gear means having first and second cluster gear members, said first cluster gear member meshing with said first reductioN gear member, a second reduction gear member meshing with said second cluster gear member, first selectively operable clutch means drivingly connected with said second reduction gear member, second selectively operable clutch means drivingly connected with said cluster gear means, a third reduction gear member drivingly connected to said first clutch means, and drive gear means drivingly connected to said third reduction gear means and said output means for providing a drive therebetween; and planetary gear means including a first planetary member drivingly connected with said second clutch means, a second planetary member drivingly connected with said output means through said drive gear means, and a third planetary member continuously drivingly connected with said input means; said hydraulic transmission, and said drive reduction gear means being operable to provide a variable ratio hydraulic drive between said input and output means when said first clutch means is operated; said hydraulic transmission, said drive reduction gear means, and said planetary gear means being operable to provide a variable ratio hydromechanical drive between said input and output means when said second clutch means is operated.
Claim 8
Dependent Claim
258 words
A hydromechanical transmission comprising; input means; output means; variable ratio hydraulic transmission means including pump means drivingly connected with said input means, motor means in fluid communication with said pump means, and an output member drivingly connected with said motor means; drive reduction gear means including a first reduction gear member drivingly connected with said output member, cluster gear means having first and second cluster gear members, said first cluster gear member meshing with said first reductioN gear member, a second reduction gear member meshing with said second cluster gear member, first selectively operable clutch means drivingly connected with said second reduction gear member, second selectively operable clutch means drivingly connected with said cluster gear means, a third reduction gear member drivingly connected to said first clutch means, and drive gear means drivingly connected to said third reduction gear means and said output means for providing a drive therebetween; and planetary gear means including a first planetary member drivingly connected with said second clutch means, a second planetary member drivingly connected with said output means through said drive gear means, and a third planetary member continuously drivingly connected with said input means; said hydraulic transmission, and said drive reduction gear means being operable to provide a variable ratio hydraulic drive between said input and output means when said first clutch means is operated; said hydraulic transmission, said drive reduction gear means, and said planetary gear means being operable to provide a variable ratio hydromechanical drive between said input and output means when said second clutch means is operated.
Claim 9
Dependent Claim
265 words
A hydromechanical transmission comprising; input means; output means; variable ratio hydraulic transmission means including pump means drivingly connected with said input means, motor means in fluid communication with said pump means, and an output member drivingly connected with said motor means; drive reduction gear means including a first reduction gear member drivingly connected with said output member, cluster gear means having first and second cluster gear means, said first cluster gear member meshing with said first reduction gear member, a second reduction gear member meshing with said second cluster gear member, first selectively operable clutch means drivingly connected with said second reduction gear member, second selectively operable clutch means drivingly connected with said cluster gear means, a third reduction gear member drivingly connected to said first clutch means, and drive gear means drivingly connected to said third reduction gear means and said output means for providing a drive therebetween; planetary gear means including a sun gear member drivingly connected with said second clutch means, a ring gear member drivingly connected with said output means through said drive gear means, and a planet carrier member; and input reduction gear means continuously drivingly connecting said input means and said planet carrier; said hydraulic transmission, and said drive reduction gear means being operable to provide a variable ratio hydraulic drive between said input and output means when said first clutch means is operated; said hydraulic transmission, said drive reduction gear means, and said planetary gear means being operable to provide a variable ratio hydromechanical drive between said input and output means when said second clutch means is operated.
Claim 10
Dependent Claim
265 words
A hydromechanical transmission comprising; input means; output means; variable ratio hydraulic transmission means including pump means drivingly connected with said input means, motor means in fluid communication with said pump means, and an output member drivingly connected with said motor means; drive reduction gear means including a first reduction gear member drivingly connected with said output member, cluster gear means having first and second cluster gear means, said first cluster gear member meshing with said first reduction gear member, a second reduction gear member meshing with said second cluster gear member, first selectively operable clutch means drivingly connected with said second reduction gear member, second selectively operable clutch means drivingly connected with said cluster gear means, a third reduction gear member drivingly connected to said first clutch means, and drive gear means drivingly connected to said third reduction gear means and said output means for providing a drive therebetween; planetary gear means including a sun gear member drivingly connected with said second clutch means, a ring gear member drivingly connected with said output means through said drive gear means, and a planet carrier member; and input reduction gear means continuously drivingly connecting said input means and said planet carrier; said hydraulic transmission, and said drive reduction gear means being operable to provide a variable ratio hydraulic drive between said input and output means when said first clutch means is operated; said hydraulic transmission, said drive reduction gear means, and said planetary gear means being operable to provide a variable ratio hydromechanical drive between said input and output means when said second clutch means is operated.
Claim 11
Dependent Claim
288 words
A hydromechanical transmission comprising; input means; output means; variable ratio hydraulic transmission means including pump means drivingly connected with said input means, motor means in fluid communication with said pump means, and an output member drivingly connected with said motor means; drive reduction gear means including a first reduction gear member drivingly connected with said output member, cluster gear means having first and second cluster gear members, said first cluster gear member meshing with said first reduction gear member, a second reduction gear member meshing with said second cluster gear member, first selectively operable clutch means drivingly connected with said second reduction gear member, second selectively operable clutch means drivingly connected with said cluster gear means, a third reduction gear member drivingly connected to said first clutch means, and drive gear means drivingly connected to said third reduction gear means and said output means for providing a drIve therebetween; planetary gear means including a first planetary member drivingly connected with said second clutch means, a second planetary gear member drivingly connected with said output means through said drive gear means, and a third planetary gear member continuously drivingly connected with said input means; and third selectively engageable clutch means in parallel with said cluster gear means for providing a high speed, low torque reverse drive ratio between said input and output means; said hydraulic transmission, and said drive reduction gear means being operable to provide a variable ratio hydraulic drive between said input and output means when said first clutch means is operated; said hydraulic transmission, said drive reduction gear means, and said planetary gear means being operable to provide a variable ratio hydromechanical drive between said input and output means when said second clutch means is operated.
Claim 12
Dependent Claim
288 words
A hydromechanical transmission comprising; input means; output means; variable ratio hydraulic transmission means including pump means drivingly connected with said input means, motor means in fluid communication with said pump means, and an output member drivingly connected with said motor means; drive reduction gear means including a first reduction gear member drivingly connected with said output member, cluster gear means having first and second cluster gear members, said first cluster gear member meshing with said first reduction gear member, a second reduction gear member meshing with said second cluster gear member, first selectively operable clutch means drivingly connected with said second reduction gear member, second selectively operable clutch means drivingly connected with said cluster gear means, a third reduction gear member drivingly connected to said first clutch means, and drive gear means drivingly connected to said third reduction gear means and said output means for providing a drIve therebetween; planetary gear means including a first planetary member drivingly connected with said second clutch means, a second planetary gear member drivingly connected with said output means through said drive gear means, and a third planetary gear member continuously drivingly connected with said input means; and third selectively engageable clutch means in parallel with said cluster gear means for providing a high speed, low torque reverse drive ratio between said input and output means; said hydraulic transmission, and said drive reduction gear means being operable to provide a variable ratio hydraulic drive between said input and output means when said first clutch means is operated; said hydraulic transmission, said drive reduction gear means, and said planetary gear means being operable to provide a variable ratio hydromechanical drive between said input and output means when said second clutch means is operated.
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) | 1976-10-08 | 1977-04-09 | 1977-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-08 | 1981-04-09 | 1981-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-08 | 1985-04-09 | 1985-10-09 | $7700.00 | Window Closed / Lapsed |