ALEXANDRIA, Va., Oct. 28 -- United States Patent no. 12,454,252, issued on Oct. 28, was assigned to KOBELCO CONSTRUCTION MACHINERY Co. LTD. (Hiroshima, Japan).
"Jack device and work machine equipped with same" was invented by Ryuichi Arita (Hyogo, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "Provided is a jack device rendering an operation of changing the posture of a jack cylinder easy without using a device that actively changes the posture. The jack device includes an arm, a jack body including the jack cylinder, and a reaction-force application unit supported by the arm. The reaction-force application unit makes a reaction-force moment act on the jack body in all postures from the upright posture...