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:
Oct. 02, 2018
Filed:
Dec. 25, 2014
Hitachi Construction Machinery Co., Ltd., Tokyo, JP;
Ryota Yamasaki, Tokyo, JP;
Yoshinori Ookura, Tokyo, JP;
Tomoyuki Hamada, Tsuchiura, JP;
Tsutomu Yamada, Tokyo, JP;
Hitachi Construction Machinery Co., Ltd., Tokyo, JP;
Abstract
To provide a technology that enables dump trucks to travel smoothly even in a mine where electromagnetic wave conditions are bad. The invention is a vehicle travel system in which haulage vehiclestraveling in a premise of a mine along predetermined travel routesand a fleet management server for managing operations of haulage vehicles are connected in communication together via wireless communication network and that sets a travel-permitted segment n+1 so that difference between a communication timing at which the haulage vehicle-transmits permission request information to the fleet management server from a provisional permission-requesting point RP and communication timing at which other haulage vehicle transmits the permission request information to the same wireless base station may become more than or equal to a predetermined threshold value.