ALEXANDRIA, Va., Sept. 30 -- United States Patent no. 12,428,817, issued on Sept. 30, was assigned to Caterpillar SARL (Geneva).
"Hydraulic circuit of a construction machinery" 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: Provide a hydraulic circuit of a construction machinery that can effectively use the excess flow rate of the first hydraulic pump. Solution: In the hydraulic circuit, when signals are output from the first travel operator, the second travel operator, and the actuator operator, hydraulic oil is supplied from the first hydraulic pump to the actuator switch valve. Hydraulic oil is also supplied from the...