Motor or pump mechanism having at least two distinct active cyli

Details Motor or pump mechanism having at least two distinct active cyli Motor or pump mechanism having at least two distinct active cyli

1986-10-16

1988-02-16

Freeh, William L.

Motors: expansible chamber type

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

Radially disposed cylinders

91497, F01B 1306

Patent

active

047247428

ABSTRACT:
The invention relates to a hydraulic motor having an undulating cam and at least one large and one small selectable operating cylinder capacity. In the motor, cylinder feed orifices (41a, 42a) are distributed around the circumference of a circle about the axis of rotation (5), and the small cylinder capacity corresponds to an irregular angular distribution of active cylinder orifices (41a) which continue to be fed. This configuration makes it possible to provide a constant velocity motor with at least two different cylinder capacities and which is mechanically long-lasting.

REFERENCES:
patent: 3369457 (1968-02-01), Guinof
patent: 3593621 (1971-07-01), Praddaude
patent: 3760691 (1973-09-01), Alecrner
patent: 4157056 (1979-06-01), Allart et al.
patent: 4404896 (1983-09-01), Allart et al.
patent: 4532854 (1985-08-01), Foster

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