Piston roller alignment configuration for a radial piston mechan

Details Piston roller alignment configuration for a radial piston mechan Piston roller alignment configuration for a radial piston mechan

1995-11-13

1997-05-27

Thorpe, Timothy

Motors: expansible chamber type

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

Radially disposed cylinders

417273, 417462, 92 72, 92165R, 92165PR, F04B 1107, F16J 110

Patent

active

056321910

ABSTRACT:
The invention relates to a hydraulic mechanism comprising: a cam; a cylinder block; cylinders formed in the cylinder block; pistons slidably mounted in the cylinders; thrust rollers for the pistons acting on the cam and axially defined by two transverse faces; two wedging parts for each roller, each wedging part being disposed in a recess between the end face of the roller and the inside face of the cylinder, thereby holding the roller in position, one of the wedging parts extending to the bottom portion of the recess and including a groove parallel to the axis of the piston, and a projection that is fixed relative to the cylinder being received in the groove. According to the invention, a hole formed in the cylinder block opens out into its peripheral face and a generally U-shaped part having two branches is mounted on the cylinder block by inserting a first branch thereof in the hole and by fixing the first branch relative to the cylinder block, its second branch being inserted in the groove and constituting said projection, the web of the U-shape overlying the peripheral face. An application of the invention lies in making a hydraulic motor that is reliable and that is of reduced manufacturing cost.

REFERENCES:
patent: 4719843 (1988-01-01), Noel
patent: 4747339 (1988-05-01), Wusthof et al.
patent: 5081906 (1992-01-01), Lemaire et al.

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