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US 5,737,996 AGranted
Hydraulic axial piston machine
AssigneeDanfoss Inc.
InventorOve Thorbo.o slashed.l Hansen
Life of this patent
Estimating the term…
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AssigneeDanfoss Inc.
InventorOve Thorbo.o slashed.l Hansen
Estimating the term…
A hydraulic axial piston machine (1) is disclosed, having a cylinder drum (2), which has at least one cylinder (5) in which a piston (9) is arranged to move back and forth, and having a control plate (3), which on rotation of the cylinder drum (2) and control plate (3) relative to one another connects the cylinder (5), in dependence on its position, to a fluid inlet and a fluid outlet (4), a pressure plate (6) being arranged between the cylinder drum (2) and the control plate (3) and having for each cylinder (5) a fluid path (14) between the control plate (3) and the cylinder drum (2). It is desirable for such a machine to be capable of operation also with a hydraulic fluid that has no or only slight lubricating properties. To that end, the cylinder (5) is lined with a bushing (10) of a friction-reducing plastics material which projects from the cylinder drum (2) and is inserted in the pressure plate (6).
A hydraulic axial piston machine having a cylinder drum having at least one cylinder in which a piston is arranged to move back and forth, and having a control plate, which on rotation of the cylinder drum and control plate relative to one another connects the cylinder, in dependence on its position, to a fluid inlet and a fluid outlet, a pressure plate located between the cylinder drum and the control plate and having for each cylinder a fluid path between the control plate and the cylinder drum, the cylinder being lined with a bushing of a friction-reducing plastics material which projects from the cylinder drum and includes a portion which extends into pressure plate.
Dependencies are inferred from the claim text.