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:
Jul. 19, 2022
Filed:
Apr. 05, 2017
Hitachi Construction Machinery Co., Ltd., Tokyo, JP;
Ryu Narikawa, Tokyo, JP;
Manabu Edamura, Tsuchiura, JP;
Kouji Ishikawa, Tsuchiura, JP;
Shiho Izumi, Tsuchiura, JP;
HITACHI CONSTRUCTION MACHINERY CO., LTD., Tokyo, JP;
Abstract
A hydraulic excavator includes a controller () that executes region limiting control to forcibly raise a boom () in such a manner that a position of a tip end of a bucket () is kept on a target excavation surface and within a region above the target excavation surface if an operation device () issues an action direction to an arm () or the bucket. The controller determines which is selected as a control mode over a raising speed of the boom at a time of executing region limiting control, a first mode or a second mode specified by a raising speed lower than a raising speed of the first mode if the tip end of the bucket is located below the target excavation surface, and controls the raising speed of the boom based on a result of determination.