US3592079A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic speed change gear
Assignee: Nissan Motor Co Ltd
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Filing: 1969-10-27
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Granted: 1971-07-13
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Expires: 1989-10-27
Abstract
Abstract An automatic speed change gear in 6 to 8 forward stages and one rearward stage of speed reduction ratio, which comprises a hydraulic torque converter and a first and a second planetary gear assemblies. The first planetary gear assembly transmits the power from said torque converter to the second planetary gear assembly in at least three forward stages and a rearward stage. The second planetary gear assembly delivers output power in at least three forward slow speed stage and a rearward stage when it is not coupled with the torque converter, while in at least three forward high speed stages when it is coupled with the torque converter.
Inventors
- 👤 Yoichi Mori
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:14
CPC Classifications
F; F16; F16H; F16H47/00; F16H47/06; F16H47/08; F16H47/085; F16H3/00; F16H3/44; F16H3/62; F16H3/66; F16H3/663; F16H3/666; F16H2200/00; F16H2200/003; F16H2200/0052; F16H2200/0056; F16H2200/006; F16H2200/20; F16H2200/2002; F16H2200/2007; F16H2200/203; F16H2200/2048; F16H2200/2051; F16H2200/2053
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
366 words
An automatic speed change gear comprising an input shaft, a hydraulic torque converter connected to said input shaft, a Ravigneaux-type first planetary gear assembly, said Ravigneauxtype first planetary gear assembly comprising a plurality of rotary elements including a first and second sun gear, a rotatable carrier, at least one first and second planet gears rotatably mounted on said carrier, said first planet gear meshing with said first sun gear and said second planet gear meshing with said second sun gear and said first planet gear, and a ring gear meshing with said first planet gear, a second planetary gear assembly positioned in axial alignment with said first planetary gear assembly and comprising a plurality of rotary elements including a sun gear, a ring gear, a rotatable carrier, and at least one first and second planet gears rotatably mounted on said carrier member, said first planet gear meshing with said sun gear and said second planet gear meshing with said first planet gear and with said ring gear, said sun gear of said second planetary gear set being drivingly connected to said ring gear of said first planetary gear assembly, first clutch means including at least one clutch connecting said Ravigneaux-type first planetary gear assembly to said torque converter, first brake means selectively engageable with rotary elements of said first planetary gear assembly, a second brake means selectively engageable with a rotary element of said second planetary gear assembly, second clutch means including at least one clutch connecting said second planetary gear assembly to said input shaft, third clutch means operatively connecting said input shaft to said first planetary gear assembly and, an output means connected to the ring gear of said second planetary gear assembly, said first planetary gear assembly being adapted to transmit input power from said torque converter to said second planetary gear assembly in at least four forward stages and a rearward stage, said second planetary gear assembly being adapted to deliver output power to said output means in at least four forward low speed stages and a rearward stage when said second brake means is actuated, and in at least four forward high speed stages when said second clutch means is actuated.
Claim 2
Dependent Claim
366 words
An automatic speed change gear comprising an input shaft, a hydraulic torque converter connected to said input shaft, a Ravigneaux-type first planetary gear assembly, said Ravigneauxtype first planetary gear assembly comprising a plurality of rotary elements including a first and second sun gear, a rotatable carrier, at least one first and second planet gears rotatably mounted on said carrier, said first planet gear meshing with said first sun gear and said second planet gear meshing with said second sun gear and said first planet gear, and a ring gear meshing with said first planet gear, a second planetary gear assembly positioned in axial alignment with said first planetary gear assembly and comprising a plurality of rotary elements including a sun gear, a ring gear, a rotatable carrier, and at least one first and second planet gears rotatably mounted on said carrier member, said first planet gear meshing with said sun gear and said second planet gear meshing with said first planet gear and with said ring gear, said sun gear of said second planetary gear set being drivingly connected to said ring gear of said first planetary gear assembly, first clutch means including at least one clutch connecting said Ravigneaux-type first planetary gear assembly to said torque converter, first brake means selectively engageable with rotary elements of said first planetary gear assembly, a second brake means selectively engageable with a rotary element of said second planetary gear assembly, second clutch means including at least one clutch connecting said second planetary gear assembly to said input shaft, third clutch means operatively connecting said input shaft to said first planetary gear assembly and, an output means connected to the ring gear of said second planetary gear assembly, said first planetary gear assembly being adapted to transmit input power from said torque converter to said second planetary gear assembly in at least four forward stages and a rearward stage, said second planetary gear assembly being adapted to deliver output power to said output means in at least four forward low speed stages and a rearward stage when said second brake means is actuated, and in at least four forward high speed stages when said second clutch means is actuated.
Claim 3
Dependent Claim
58 words
An automatic speed change gear as claimed in claim 1, wherein said input shaft comprises an engine crankshaft positioned parallel to and spaced radially from the longitudinal axis of said planetary gear sets, one end of said engine crankshaft being connected to said torque converter and the other end thereof being operatively connected with said second clutch means.
Claim 4
Dependent Claim
26 words
An automatic speed change gear as claimed in claim 2 further comprising, a fluid coupling operatively connected between said engine crankshaft and said second clutch means.
Claim 5
Dependent Claim
58 words
An automatic speed change gear as claimed in claim 1, wherein said input shaft is positioned parallel to and spaced radially outwardly from the longitudinal axis of said planetary gear sets, one end of said input shaft being connected with said torque converter and the other end of said input shaft being connected with said second clutch means.
Claim 6
Dependent Claim
145 words
An automatic speed change gear as claimed in claim 1, wherein said input shaft is comprised of an engine crankshaft portion on one side of said torque converter and an additional portion on the other side of said torque converter positioned parallel to and spaced radially from the longitudinal axis of said planetary gear sets, one end of said additional portion of said input shaft being connected with the turbine of said torque converter and the other end of sAid additional portion of said input shaft being operatively connected with said first clutch means, said second clutch means being positioned axially between said torque converter and said second planetary gear set, with said second planetary gear set being positioned axially between said second clutch means and said first planetary gear set, the pump of said torque converter being operatively connected with said second clutch means.
Claim 7
Dependent Claim
106 words
An automatic speed change gear as claimed in claim 1, wherein said torque converter and said first and said second planetary gear sets are in axial alignment with each other, said input shaft being positioned along the longitudinal axis of said planetary gear sets and having one end thereof operatively connected with the pump of said torque converter and the other end thereof operatively connected with said second clutch means, said first planetary gear set being positioned axially between said torque converter and said second planetary gear sets and said first clutch means being positioned axially between said torque converter and said first planetary gear set.
Claim 8
Dependent Claim
49 words
An automatic speed change gear as claimed in claim 6, said third clutch means being positioned axially between said first and said second planetary gear sets adjacent said first planetary gear set and said second planetary gear set is positioned axially between said second and said third clutch means.
Claim 9
Dependent Claim
35 words
An automatic speed change gear as claimed in claim 7, wherein said second clutch means comprises a fluid coupling, and said output means is in axial alignment with the longitudinal axis of said input shaft.
References Cited (Backward Citations)
US2886983A
Cited
US3411382A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-12 | 1975-01-11 | 1975-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-12 | 1979-01-11 | 1979-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-12 | 1983-01-11 | 1983-07-13 | $7700.00 | Window Closed / Lapsed |