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:
Mar. 18, 2014
Filed:
May. 20, 2011
Tatsuo Takishita, Koka, JP;
Katsuyoshi Nasu, Konan, JP;
Hajime Kurikuma, Koka, JP;
Hitachi Construction Machinery Co., Ltd., Tokyo, JP;
Abstract
A construction machine that can limit consumption of battery electric power is provided. The construction machine includes: air-cooled heat exchangers; a cooling fanfor generating cooling air for the heat exchangers; a fan electric drive motorthat is driven by electric power of a batteryfor rotating the cooling fan; an inverter unitfor drivingly controlling the fan electric drive motor; a lock leverdisposed at a boarding-alighting port and configured to be operated into an unlocked position and a locked position; and a lock valvefor making an operation of an operating deviceor the like ineffective or the operating device inoperative when the lock leveris operated into the locked position. The inverter unitstops the fan electric drive motorwhen the lock leveris operated into the locked position.