ALEXANDRIA, Va., June 12 -- United States Patent no. 12,297,620, issued on May 13, was assigned to HITACHI CONSTRUCTION MACHINERY Co. LTD. (Tokyo).
"Work machine" was invented by Masatoshi Morikawa (Ushiku, Japan), Shinji Nishikawa (Kasumigaura, Japan) and Hiroaki Tanaka (Kasumigaura, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "An object of the present invention is to provide a work machine that is capable of flexibly setting an entry-prohibited area for a work device according to an operator's intention. To achieve this, a controller 40 sets, as a first position, the position of a work tool 8 that is located when a setting switch 33 is operated, and sets, as a second position, the position of the w...