Caterpillar Inc.

Bart Jerome Bradford

Ernest Everett Stoops

Travis Neale Richards

Ramalho Stive

Dwanz Mwalimu Mwasi

Michael Robert Kunde

Michael Lemoyne Repscher

Matthew David Roley

Charles Eric Nail

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

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Mt. Zion, IL, United States of America

Bart Jerome Bradford