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:
Jan. 09, 2018
Filed:
Jan. 06, 2015
Hitachi Construction Machinery Co., Ltd., Tokyo, JP;
Takako Satake, Ishioka, JP;
Tomoaki Kaneta, Kasumigaura, JP;
Kouji Ishikawa, Kasumigaura, JP;
Hidetoshi Satake, Ishioka, JP;
Shinya Imura, Toride, JP;
Hitachi Construction Machinery Co., Ltd., Tokyo, JP;
Abstract
A construction machine is characterized by including: a track structurea swing structureprovided on the track structurein a swingable manner; swing motorsthat drive and swing the swing structure; a boomconnected to the swing structurea boom cylinderthat moves the boomvertically; a swing operation systemthat instructs a swing operation of the swing structurea boom operation systemthat instructs a vertical movement of the booma detectorthat detects a bottom pressure of the boom cylinderand a controllerthat reduces swing speed of the swing structureaccording to a signal from the detectorwith respect to a reference swing speed according to a signal of the swing operation, while signals of the swing operation and a boom raising operation are being inputted. This ensures that a load acting on the boom can be felt on the basis of motion of a front work implement, and, on the other hand, the front work implement can be operated along a locus according to operation without being affected by the load on the boom.