US Patent Issued to Hitachi Construction Machinery on Nov. 3 for "Work machine" (Japanese Inventors)

ALEXANDRIA, Va., Nov. 3 -- United States Patent no. 12,781,474, issued on Nov. 3, was assigned to Hitachi Construction Machinery Co. Ltd. (Tokyo).

"Work machine" was invented by Daijirou Arai (Tsuchiura, Japan), Kazuo Takiguchi (Tsuchiura, Japan) and Kyousuke Akiyama (Tsuchiura, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A work machine is provided with a first hydraulic actuator that uses a plurality of hydraulic pumps as hydraulic fluid sources; a plurality of pump combiner valves that controls each supply flow rate of hydraulic fluid from the plurality of hydraulic pumps to the first hydraulic actuator; a second hydraulic actuator that shares a hydraulic fluid source with the first hydraulic actu...