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:
Nov. 05, 2024
Filed:
Sep. 29, 2020
Hitachi Construction Machinery Co., Ltd., Tokyo, JP;
Tarou Akita, Tsuchiura, JP;
Takahiro Kobayashi, Tsuchiura, JP;
Akihiro Narazaki, Tsukuba, JP;
Masamichi Ito, Toride, JP;
HITACHI CONSTRUCTION MACHINERY CO., LTD., Tokyo, JP;
Abstract
When an operation amount of an operation lever corresponding to a boom cylinder is equal to or smaller than an operation amount of an operation lever corresponding to an arm cylinder, an estimated velocity of the arm cylinder used for region limiting control is computed on the basis of a first condition defining, in advance, a relation between the operation amount of the operation lever and the estimated velocity of the arm cylinder. When the operation amount of the operation lever corresponding to the boom cylinder is larger than the operation amount of the operation lever corresponding to the arm cylinder, the estimated velocity of the arm cylinder used for the region limiting control is computed as a velocity higher than the estimated velocity of the arm cylinder computed on the basis of the first condition. The behavior of the work device can thereby be stabilized.