Pilot controlled variable displacement fluid motor

Details Pilot controlled variable displacement fluid motor Pilot controlled variable displacement fluid motor

1977-12-15

1978-12-26

Geoghegan, Edgar W.

Motors: expansible chamber type

Three or more cylinders arranged in parallel radial or...

Radially disposed cylinders

91498, F01B 106

Patent

active

041310560

ABSTRACT:
A pilot controlled variable displacement fluid motor is disclosed wherein fluid under pressure, received from a fluid pressure source such as a closed-center type system, is convertible selectively into bi-directional rotary motion at infinitely variably controlled speeds and torques. The motor is further characterized in that a change in the positional relationship of an arcuately movable control input member with relation to the position of an arcuately movable power output member, in combination with power transfer means, is effective for adjusting the power output speed to that of the control input member. Furthermore, the torque output is automatically adjusted to the load demand, whereby only the quantity of fluid, required to satisfy the speed selection and the torque demand, at a predetermined pressure level, is used by the motor.

REFERENCES:
patent: 3339460 (1967-09-01), Birdwell
patent: 3357362 (1967-12-01), Orr
patent: 3899958 (1975-08-01), Spencer

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