Method of and device for power transmission

Endless belt power transmission systems or components – Control for variable input to output speed-ratio

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474 70, F16H 5900

Patent

active

054217857

ABSTRACT:
Method of and device for power transmission using a circulating fluid under pressure delivered from a hydraulic pump in proportion to the number of revolutions of an engine output shaft. In order to intermittently transmit a rotational force of an engine output shaft to a gear box input shaft, the internal gear of the planetary gear drive is changed in its state between a rotatable state, a slip state and a fixed state in accordance with the number of revolutions of the engine output shaft. The planetary gear drive comprises a sun gear mounted on the engine output shaft to be rotated at the same time of rotation of the engine output shaft, a plurality of planetary gears gearing with the sun gear and rotatably mounted on a planetary gear carrier, an internal gear gearing with the plurality of planetary gears and selectively changed in its state, and the planetary gear carrier tightly connected to the input shaft such that it rotates the input shaft when it is rotated by the rotational force of the engine output shaft. In order to change the state of the internal gear between the three states, a hydraulic compressing circuit is provided for the power transmission device and cooperates with the engine output shaft.

REFERENCES:
patent: 3011353 (1961-12-01), Friedrich et al.
patent: 3610062 (1969-12-01), Hoff
patent: 3721132 (1973-03-01), Johnson
patent: 4269296 (1981-05-01), Flotow et al.
patent: 4305326 (1981-12-01), Sallach et al.
patent: 4740191 (1988-04-01), Takano et al.
patent: 4950208 (1990-08-01), Tomlinson

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