Caterpillar Inc.

Mark D Miller

Russell William Strong

Alan Dale Gustafson

Elmer R Crabb

Samuel B Stevens

Lynn A Sutton

Robert L Stamate

Jeffrey A Moore

Robert C Bastian

William C Boroski

Melvin P Busch, Jr

Patrick W Friede

David C Koch

James R Oldham

Joseph M Tucker, Iii

A pressure regulating valve usable in combination with a hydraulic steering system has a spring mechanism axially disposed between a pair of axially aligned valve spools. Movement of the spring mechanism in a first direction resiliently moves one of the valve spools to a position for communicating an inlet port with a control port and regulating the pressure in the the control port so that the pressure is proportional to the degree of movement of the spring mechanism. Conversely, movement of the spring mechanism in a second direction resiliently moves the other valve spool to a position for communicating the inlet port with another control port and regulating the pressure in the other control port so that the pressure is proportional to the degree of movement of the spring mechanism.

Pressure regulating valve

Work machine having endless ground engaging drive belts

Growing community of inventors

Montgomery, IL, United States of America

Mark D Miller