Variable displacement motor

Details Variable displacement motor Variable displacement motor

1983-03-07

1985-01-15

Vrablik, John J.

Rotary expansible chamber devices

Working member has planetary or planetating movement

Adjustable or resiliently biased working member

418 60, 418 61B, 417310, 464 82, 464156, F03C 200

Patent

active

044936222

ABSTRACT:
A hydraulic motor which varies its displacement in accordance with varying torque loads on its output shaft. The motor is biased to a low displacement, low torque, high speed mode, and changes to a high displacement, high torque, low speed mode when the torque load on its output shaft increases. The motor has eccentrically disposed gerotor gears that rotate and orbit relative to each other to expand and contract fluid chambers on opposite sides of a center line of eccentricity. The gerotor gears can change their orientation relative to each other in response to changes in the torque load on the output shaft, changed, in order to change the displacement of the motor.

REFERENCES:
patent: 3200756 (1965-08-01), Ratliff, Jr. et al.
patent: 3687578 (1972-08-01), White, Jr. et al.
patent: 3784336 (1974-01-01), Schultz
patent: 3871798 (1975-03-01), Berlich
patent: 4082480 (1978-04-01), McDermott

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