Geared traction unit

Details Geared traction unit Geared traction unit

1993-06-11

1995-10-10

Look, Edward K.

Planetary gear transmission systems or components

Fluid drive or control of planetary gearing

Fluid resistance inhibits relative rotation

475159, F16H 4704, F16H 1306

Patent

active

054566428

ABSTRACT:
A geared torque transfer device is provided having a planetary type gear arrangement disposed within a housing that is substantially filled with a viscous fluid. Rotation of the planetary gear members within the housing in response to differential input and output rotational velocity causes the viscous fluid to be pumped through passages formed within the housing. Hydraulic resistance to this pumping action resists the free rotation of the unit for causing torque to be transferred from the input to the output.

REFERENCES:
patent: 2454694 (1908-11-01), Gregg
patent: 2743628 (1956-05-01), Scharaffa
patent: 4084654 (1978-04-01), Dudek
patent: 4157668 (1979-06-01), Fukuma et al.
patent: 4389908 (1983-06-01), Dudek
patent: 4472984 (1989-09-01), Cook
patent: 4882950 (1989-11-01), Gausrab et al.
patent: 4916973 (1990-04-01), Fuelberth et al.
patent: 4944195 (1990-07-01), Takahashi et al.
patent: 5147252 (1992-09-01), Mace et al.
"PDS (Porsche Dynamic Slip Control Clutch)-A New Inter-Axle Coupling Device For 4WD-Cars", Muer et al., SAE Paper No. 880698, Copyright 1988.
"Meshed Planetary Trains Give Gear Limited Slip Differential", Design News, Mar. 22, 1976, pp. 96-97.
TrueTrac Sales Literature, "Torque Proportioning Differential", 1979 Tractech, Inc.

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