The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 19, 2026
Filed:
Mar. 27, 2023
Hitachi Construction Machinery Co., Ltd., Tokyo, JP;
Ryu Narikawa, Mito, JP;
Teppei Saitoh, Mito, JP;
Tadashi Kotani, Kashiwa, JP;
Hideaki Ito, Katori, JP;
Kei Sato, Tsuchiura, JP;
Hidefumi Ishimoto, Tsukuba, JP;
HITACHI CONSTRUCTION MACHINERY CO., LTD., Tokyo, JP;
Abstract
A work machine controller is configured to, when in a swinging operation, identify a circumferential operation start position of the tip of an arm based on a detected posture of the work device, and identify an angular interference prevention position in a swing direction that does not interfere between a vessel being loaded and the work device. A lower limit value of a height direction of the work device corresponding to the angular position in the swing direction of the arm is calculated to be within an operating range of the swing body from the identified operation start position to the interference prevention position. While the swinging body is in motion, the controller invalidates the operation of the arm and controls the movement of the boom and the swinging body so that the height of the tip of the arm does not fall below the lower limit value.