ALEXANDRIA, Va., Jan. 28 -- United States Patent no. 12,534,882, issued on Jan. 27, was assigned to Caterpillar SARL (Geneva).
"Hydraulic circuit for a construction machine" was invented by Hideki Nakajima (Akashi, Japan) and Koichi Kiyasu (Akashi, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "Problem to be solved: To provide a hydraulic circuit for a construction machine capable of supplying hydraulic oil to a closed circuit without a charge pump. Means for solving the problem: The open circuit of the hydraulic circuit includes a hydraulic pump, a hydraulic actuator operated by hydraulic oil discharged from the hydraulic pump, a directional switching valve for switching a flow direction of the hydrau...