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:
Dec. 06, 2016
Filed:
Mar. 11, 2015
Sumitomo Heavy Industries, Ltd., Tokyo, JP;
Tetsuji Ono, Chiba, JP;
Sumitomo Heavy Industries, Ltd., Tokyo, JP;
Abstract
An electric swiveling type construction machine includes a lower travelling body, an upper swivel body which is turnably mounted on the lower travelling body, a boom in which one end is rotatably attached to the upper swivel body, an arm in which one end is rotatably attached to the other end of the boom, a working element which is rotatably attached to the other end of the arm, a brake mechanism which holds the upper swivel body, a swiveling motor which swivels and drives the upper swivel body, a state monitoring unit which monitors the state of the brake mechanism, and a controller which detects releasing of braking performed by the brake mechanism based on the monitor by the state monitoring unit. The swiveling motor does not generate a force until the controller detects the releasing of the brake.