Cam follower piston

Details Cam follower piston Cam follower piston

1975-07-22

1977-08-23

Cohen, Irwin C.

Expansible chamber devices

With lubricating means

Piston has lubricant retaining or conducting means

91488, 92181P, 92248, F16J 108, F16J 110

Patent

active

040432556

ABSTRACT:
A piston for a hydrostatic machine comprises a cam follower ball in a seating in a piston body. An aperture through the piston body provides access for working fluid to reach the seating to give lubrication and hydrostatic support. A low friction insert of synthetic plastics material in the seating provides a bearing surface for the ball. The insert is retained in the piston body by a lip which prevents or inhibits extrusion of the plastics material under working load pressure.

REFERENCES:
patent: 2712794 (1955-07-01), Humphreys
patent: 2954992 (1960-10-01), Baker
patent: 3125004 (1964-03-01), White
patent: 3186352 (1965-06-01), Anderson

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