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:
Aug. 10, 2021
Filed:
Apr. 27, 2018
Hitachi Construction Machinery Co., Ltd., Tokyo, JP;
Satoshi Nakamura, Hitachinaka, JP;
Kunitsugu Tomita, Kashiwa, JP;
Kazunori Hoshino, Tsukuba, JP;
Yousuke Yamanobe, Ushiku, JP;
Youhei Toriyama, Kashiwa, JP;
HITACHI CONSTRUCTION MACHINERY CO., LTD., Tokyo, JP;
Abstract
A hydraulic excavator () including a controller () having a load computing section () configured to compute a load of a work target material on the basis of thrust information about a boom cylinder () during the period when a front work implement () is performing a transporting operation of a work target material, the controller () further including: a velocity limiting value computing section () configured to compute a limiting value (Vlim) of a velocity of a boom cylinder () on the basis of posture information about the work implement () at a time of starting the transporting operation; a velocity command correction section () configured to correct a velocity command in such a manner that the velocity of the boom cylinder is equal to the limiting value (Vlim) when the velocity of the boom cylinder exceeds the limiting value and output the corrected velocity command; and a drive signal generation section () configured to generate and output a drive signal for the boom cylinder on the basis of the velocity command output from a velocity command correction section.