The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 12, 2021
Filed:
Jun. 11, 2019
Caterpillar Inc., Deerfield, IL (US);
Travis Neale Richards, Chillicothe, IL (US);
Ernest Everett Stoops, Decatur, IL (US);
Michael Lemoyne Repscher, Taylorville, IL (US);
Matthew David Roley, Morton, IL (US);
Ramalho Stive, Isle d'Abeau, FR;
Michael Robert Kunde, Decatur, IL (US);
Dwanz Mwalimu Mwasi, Seco Green Valley, AZ (US);
Charles Eric Nail, Macon, IL (US);
Bart Jerome Bradford, Mt. Zion, IL (US);
Caterpillar Inc., Peoria, IL (US);
Abstract
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.