Towmotor Corporation

Cameron Iron Works, Inc.

Jerry L Reeves

Container handler with programmed electro-hydraulic control circuit

This invention relates to a pump arrangement (54) for use in a linear fluid operated device having a reciprocating piston (14) separating a first active fluid chamber (30) and a second chamber (32) which eliminates the problem associated with fluid leakage buildup developing in the second chamber. The pump arrangement (54) is connected to the reciprocating piston (14) and pumps leakage fluid present in the second chamber (32) from the second chamber (32) and into the first chamber (30) in response to a force of a preselected minimum magnitude being applied to the pump arrangement (54). Thus, the problems of inefficient linear fluid operated device operation, reduced piston stroke length, external fluid leakage, and erratic piston travel speed are eliminated. The pump arrangement (54) is particularly suited for use in a single acting linear hydraulic jack (12) such as used on a material handling vehicle.

Pump arrangement for a linear fluid operated device

Speed reducing mast tilt indicator

Load lifting carriage having side shift adjustable forks

Equalizing system for load lifting apparatus

Hydraulic cylinder with spherical bearing mount

Side shift fork adjustable carriage

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Dallas, OR, United States of America

Jerry L Reeves