Hydrostatic piston machine

Details Hydrostatic piston machine Hydrostatic piston machine

1980-04-03

1985-05-14

Hershkovitz, Abraham

Expansible chamber devices

Rotating cylinder

Plural cylinders

92 58, 92 71, 92 72, 92158, 91488, F01B 1304

Patent

active

045164754

ABSTRACT:
A hydrostatic piston machine has a housing, a rotor, a plurality of pistons rotatable with the rotor, and a displacing element operative for effecting reciprocation of the pistons and having a surface which is in sliding contact with the latter. Means is provided for reducing friction between the surface of the displacing element and the pistons during the sliding contact. This means includes a recess formed in the surface of the displacing element and communicating with a space which is under pressure so that a cushion of pressure fluid develops between the surface and the piston. The space under pressure may be constituted by a low pressure zone of the machine or by the low pressure and a high pressure zone of the machine.

REFERENCES:
patent: 2821932 (1958-02-01), Lucien
patent: 3744380 (1973-07-01), Steiger
patent: 3803985 (1974-04-01), Maistrelli
patent: 3818803 (1974-06-01), Scott
patent: 3866518 (1975-02-01), Miyao
patent: 3898917 (1975-08-01), Adams
patent: 4183288 (1980-01-01), Miyao

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