Hydraulic piston machine

Details Hydraulic piston machine Hydraulic piston machine

1995-04-20

1996-11-12

Freay, Charles

Pumps

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

91436, 91499, F04B 112, F04B 2708

Patent

active

055733808

ABSTRACT:
A hydraulic piston machine is disclosed, having a cylinder drum and a control plate, which control plate has at least one high-pressure "kidney" and at least one low-pressure "kidney" and also a contact surface against which the cylinder drum bears in operation, at least the contact surface being provided with a friction-reducing layer. It is desirable for such a machine to have better operational behavior and a longer service life. For that purpose, the contact surface in the region of the low-pressure kidney has a recessed region forming a gap between the cylinder drum and the control plate.

REFERENCES:
patent: 3249061 (1966-05-01), Ricketts
patent: 3585901 (1971-06-01), Moon, Jr.

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