ALEXANDRIA, Va., Aug. 20 -- United States Patent no. 12,390,900, issued on Aug. 19, was assigned to KOKI HOLDINGS Co. LTD. (Tokyo).
"Work machine" was invented by Kentaro Hatakeyama (Ibaraki, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "The work machine includes: a gear housing; a spindle protruding in a first direction from the gear housing; a bearing held by the gear housing and including an inner race and an outer race, the bearing rotatably supporting the spindle; a tip tool attachment portion to which a tip tool is attachable, the tip tool attachment portion being provided at the spindle; a sealing member positioned further in the first direction than the bearing; and a restricting member for re...