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:
Jul. 14, 2026
Filed:
Dec. 16, 2021
Hitachi Construction Machinery Co., Ltd., Tokyo, JP;
HITACHI CONSTRUCTION MACHINERY CO., LTD., Tokyo, JP;
Abstract
Provided are a machine controller that controls operation of the hydraulic excavator, an external operation controller that executes control of unattended operation that does not require operation through riding of an operator in a cab, by generating a control signal according to an operation signal received from the external through a communication terminal and sending out the control signal to the machine controller, an operation indicator light that indicates that the unattended operation of the hydraulic excavator is normally in operation, and an approach permission indicator light that indicates permission of approach of a worker to the hydraulic excavator. The external operation controller, according to information collected into the machine controller, turns on the operation indicator light when determining that the hydraulic excavator is normally operating, and turns on the approach permission indicator light when determining that approach of the worker to the hydraulic excavator is permissible.