Planetary gear transmission systems or components – Fluid drive or control of planetary gearing – Fluid pump and motor in one of plural paths to or from...
Patent
1991-08-12
1992-04-07
Lorence, Richard
Planetary gear transmission systems or components
Fluid drive or control of planetary gearing
Fluid pump and motor in one of plural paths to or from...
475 93, 475900, F16H 374
Patent
active
051023768
ABSTRACT:
A hydromechanical transmission includes a first shaft having a drive source end and a transmission end which receives torque from a drive source, a planet gear mounting structure joined to the transmission end of the first shaft, at least one planet gear rotatably mounted on the planet gear mounting structure, a ring gear surrounding and meshing with the at least one planet gear and joined by a connecting structure to a second shaft to which the transmission delivers torque, an annular sun gear slidably surrounding the transmission end of the first shaft and meshing with the at least one planet gear, a first pump having a pump operating shaft, the pump operating shaft being joined to the sun gear through gears, fluid to pump through the first pump, a valve for controlling the flow of fluid out of the first pump. A second pump and second planet gear assembly provide reverse drive, and provision is also made for neutral and park modes.
REFERENCES:
patent: 2890604 (1959-06-01), Campbell
patent: 3796111 (1974-03-01), Schauer
patent: 3969957 (1976-07-01), DeLalio
patent: 4164156 (1979-08-01), Reed
patent: 4183264 (1980-01-01), Reed
patent: 4368653 (1983-01-01), Mizuno et al.
patent: 4776233 (1988-10-01), Kita et al.
patent: 4941371 (1990-07-01), Koyama et al.
Lorence Richard
Trousdell William O.
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