Hydraulic cylinder and biased wear ring assembly for use therein

Details Hydraulic cylinder and biased wear ring assembly for use therein Hydraulic cylinder and biased wear ring assembly for use therein

1994-10-26

1995-11-21

Ryznic, John E.

Expansible chamber devices

Piston

277 70, 277165, 277221, 277222, F16J 100, F16J 906, F02F 500

Patent

active

054676894

ABSTRACT:
A linear hydraulic cylinder (11) is provided of the type having a cylinder barrel (13;113) and a piston (21;121) reciprocally disposed in the barrel. There is a main piston seal member (55) which seals between the piston and an interior surface (37) of the cylinder barrel. Disposed adjacent the piston seal is a wear ring (61;161) defining a substantially cylindrical outer surface (67) bounded by a pair of substantially square corners (66). A loader member (69) biases the wear ring into sufficiently tight engagement with the interior surface of the barrel to prevent passage of contaminant particles between the surface and the wear ring. The result is substantially reduced cylinder "drift" in the presence of contaminant particles.

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