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:
Nov. 05, 2019
Filed:
Oct. 30, 2015
Hitachi Construction Machinery Tierra Co., Ltd., Koka-shi, Shiga, JP;
Takuya Nomura, Ritto, JP;
Tatsuo Takishita, Koka, JP;
Masayuki Yunoue, Koka, JP;
Yuta Nakamura, Koka, JP;
Keisuke Sakisaka, Koka, JP;
Hitachi Construction Machinery Tierra Co., Ltd., Koka-shi, JP;
Abstract
A hydraulic excavator () includes a wireless authentication device () performing wireless authentication with a portable key device () and a vehicle body controller () for starting an engine () based on authentication by the wireless authentication device () and an operation of a start switch (). The wireless authentication device () transmits a request signal within an authenticable range and performs authentication when it receives an ID code for authentication replied from the portable key device () based on the transmitted request signal. The vehicle body controller () prohibits driving of a hydraulic actuator (E,F,G,H,E,F,A) when the portable key device () is outside of the authenticable range even if a gate lock lever () has been switched to an unlock position.