Hydrostatic motor

Details Hydrostatic motor Hydrostatic motor

1978-08-15

1981-04-07

Freeh, William L.

Motors: expansible chamber type

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

Motive fluid bypass to or from assembly

91491, F01B 1306

Patent

active

042598940

ABSTRACT:
There is disclosed a hydrostatic motor provided with radially arranged hydraulic cylinders provided with radial pistons composed of pairs of pistons with different diameters fitted one into the other. The motor is selectively operable in either of two operating conditions, in a first of which the large and small pistons move as a unit in a heavy duty operation, and in a second of which only the small pistons move in a low duty operation. The motor includes a rotor and a stator, duct means arranged in the stator for the supply of pressure fluid to the pistons, a change-over unit within the motor, and a fluid distributor unit housed in the stator. The motor of the invention employs virtually the same distributing circuits during its operation in both its heavy duty and its low duty modes of operation.

REFERENCES:
patent: 3369457 (1968-02-01), Guinot
patent: 3618467 (1969-06-01), Faisandier

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