Planetary gear transmission systems or components – Fluid drive or control of planetary gearing – Fluid resistance inhibits relative rotation
Patent
1993-11-05
1994-10-25
Look, Edward K.
Planetary gear transmission systems or components
Fluid drive or control of planetary gearing
Fluid resistance inhibits relative rotation
475 91, 192 4R, F16H 374
Patent
active
053584546
ABSTRACT:
A geared torque transfer device is provided having a planetary type gear arrangement disposed within a sealed housing that is filled with a viscous fluid. In operation, rotation of the planet gears within the housing in response to a speed differential between the input and output members causes the viscous fluid to be forcibly pumped through passages formed within the housing. Valves responsive to changes in the operating temperature and/or viscous fluid pressure of the geared traction unit adjust the amount of resistance to the flow of the fluid as it is pumped through the passages. The hydraulic resistance created by pumping the viscous fluid is adapted to resist the free rotation of the device, thereby causing torque to be transferred between the input and output members as a function of the differential speed therebetween.
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Bowen Thomas
Frost Barry L.
Look Edward K.
New Venture Gear Inc.
Nguyen Hoang
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