Radial piston machine

Details Radial piston machine Radial piston machine

1975-05-19

1976-10-12

Freeh, William L.

Motors: expansible chamber type

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

Radially disposed cylinders

F01B 1306

Patent

active

039850650

ABSTRACT:
A radial piston machine, such as a pump or a motor, has a housing in which a cylinder body is rotatable. The cylinder body has radial cylinder bores which accommodate reciprocable pistons. A shaft mounts the cylinder body for rotation and is formed with two axially spaced circumferential grooves between which it is also formed with a high-pressure control opening and with a diametrically opposite low-pressure control opening; these openings communicate intermittently with the inner ends of the cylinder bores. Sealing lands are formed on the shaft intermediate the grooves and the openings, and supporting lands are formed axially outwardly of the grooves. The supporting lands are formed with four part-circumferential recesses arranged in pairs, the recesses of each pair axially flanking one of the control openings, and the recesses of one pair being communicated with a space having a fluid pressure lower than that of the control opening which they flank and/or the recesses of the other pair being communicated with the circumferential grooves.

REFERENCES:
patent: 3082696 (1963-03-01), Henrichsen
patent: 3875852 (1975-04-01), Bosch

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