ALEXANDRIA, Va., June 6 -- United States Patent no. 12,280,990, issued on April 22, was assigned to KOBELCO CONSTRUCTION MACHINERY Co. LTD. (Hiroshima, Japan).
"Winch drive device in crane" was invented by Masaki Okubo (Hyogo, Japan), Hitoshi Sakurai (Hyogo, Japan), Yoshiki Kamon (Hyogo, Japan) and Taisuke Tsunoo (Hyogo, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "When an engine is started in a state where a support member of a multi-coupler is attached to a mating support member, the pressure of hydraulic oil increases in a detection target pipeline part. A pressure detection unit detects the pressure of the hydraulic oil in the detection target pipeline part. A connection state determining unit de...