Hydraulic mechanism, such as a motor or a pump, having radial pi

Motors: expansible chamber type – Three or more cylinders arranged in parallel radial or... – Control valve seating surface contact maintained by fluid...

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91491, F01B 1306

Patent

active

039496473

ABSTRACT:
In a pump or motor having a plurality of radial pistons adapted to perform a plurality of strokes per revolution, a stator, a rotor and a fluid-distributor slide valve fast with the stator and having a radially extending plane face opposite a radially extending plane face of said rotor, said slide valve is provided in a chamber which communicates with the interface between said faces and, by a pressure-maintaining device, with a substantially unpressurised enclosure such that the effect on said slide valve of the pressure of fluid in said chamber will substantially balance the effect of pressure of fluid acting on said interface between said faces.

REFERENCES:
patent: 2231361 (1941-02-01), Ferris
patent: 2284111 (1942-05-01), Vickers
patent: 2861552 (1958-11-01), Creighton et al.
patent: 2970578 (1961-02-01), Kohtaki
patent: 3181477 (1965-05-01), Matthews
patent: 3274898 (1966-09-01), Faisandier
patent: 3403599 (1968-10-01), Guinot
patent: 3780624 (1973-12-01), Webb
patent: 3796136 (1974-05-01), Oguni

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