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:
May. 23, 2006
Filed:
Mar. 30, 2001
Hiroshi Watanabe, Ushiku, JP;
Koichi Shibata, Ibaraki, JP;
Hiroyuki Adachi, Tsuchiura, JP;
Toichi Hirata, Ushiku, JP;
Genroku Sugiyama, Ryugasaki, JP;
Hiroshi Watanabe, Ushiku, JP;
Koichi Shibata, Ibaraki, JP;
Hiroyuki Adachi, Tsuchiura, JP;
Toichi Hirata, Ushiku, JP;
Genroku Sugiyama, Ryugasaki, JP;
Hitachi Construction Machinery Co., Ltd., Tokyo, JP;
Abstract
The present invention is applied to a system comprised of large number of hydraulic excavatorsdeployed at construction sites and a base stationEach hydraulic excavatoris provided with a storage unit (memory), a control unit (CPU) for executing the work operation and receiving as input a quantitative machine status relating to the work operation, and a communications deviceThe base stationis provided with a communications devicea management serverfor identifying the serial number of the hydraulic excavatorand transferring information, and a databasefor storing various information. The control unit of the hydraulic excavatorand the management serverof the base stationtransfer information. With this system configuration, the control unit measures the duration during which the quantitative machine status satisfies a predetermined condition and stores it in the storage unit and transmits the measurement data of the duration to the management serverof the base stationconditional on the power input key being in the off position, while the management serverreceives the measurement data of the duration and calculates the cumulative operating time. Further, the quantitative machine status and various event data stored in the storage unit of the hydraulic excavatorare sent to the base stationwhile the management server of the base stationstores the quantitative machine status and various event data in the databaseby a predetermined format.