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. 19, 2021
Filed:
Jul. 26, 2018
Hitachi Construction Machinery Co., Ltd., Tokyo, JP;
Hitachi Construction Machinery Co., Ltd., Tokyo, JP;
Abstract
An electric drive vehicle provided with a current collecting device, the current collecting device including: a framework having an underframe, a lower frame that is pivotably linked to the underframe, and an upper frame that is pivotably linked to the lower frame; a current collecting portion that is supported by the upper frame; and a lock mechanism that holds the framework in a predetermined posture, in which the framework is capable of moving up and down between a standing posture in which the current collecting portion is ascended and a folded posture in which the current collecting portion is descended, and the lock mechanism includes an adsorption plate made of a magnetic material provided in the upper frame, and a hook device which is equipped with an electromagnet and adsorbs to hold the adsorption plate by a magnetic force to hold the framework in the folded posture.