Caterpillar Inc.

Charles Eric Nail

Ernest Everett Stoops

Travis Neale Richards

Ramalho Stive

Dwanz Mwalimu Mwasi

Michael Robert Kunde

Michael Lemoyne Repscher

Matthew David Roley

Bart Jerome Bradford

A hydraulic circuit for a pair of cylinders of an articulation system includes a pump, a reservoir, a directional control valve (DCV), a pair of actuator valves (AVs) and an articulation charge circuit (ACC). The DCV is fluidly coupled to the pump, the reservoir and the pair of cylinders via a supply line, a fluid return line and a pair of cylinder supply lines (CSLs) respectively. Each CSL has a load check valve (LCV) therein. The AVs are fluidly coupled with the DCV and the pump via a pilot supply line (PSL) for actuating movement of the DCV. The ACC, associated with the PSL and each cylinder supply line downstream of the associated LCV, charges a corresponding CSL with fluid from the PSL for increasing a pressure in the corresponding CSL when the pressure in the corresponding CSL falls below the pressure of fluid associated with the PSL.

Articulation system for an earthmoving machine

Growing community of inventors

Macon, IL, United States of America

Charles Eric Nail