ALEXANDRIA, Va., Oct. 6 -- United States Patent no. 12,753,575, issued on Oct. 6, was assigned to KOMATSU LTD. (Tokyo).
"Power feeding unit and swivel joint" was invented by Masato Kageyama (Tokyo) and Jun Nabata (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "Provided is a power feeding unit mounted on a swivel joint, the power feeding unit including: a rotary transformer that is coupled to an upper swing body and a lower traveling body of a work vehicle, respectively; an oscillation circuit that is coupled to the upper swing body, converts electric power into an alternating current, and supplies the alternating current to the rotary transformer; and a smoothing circuit that is coupled to the lower tr...