专利名称：Battery-driven hydraulic excavator发明人：Kinugawa, Hideki,Komiyama, Masayuki申请号：EP97309258.8申请日：19971118公开号：EP0844337A1公开日：19980527
专利附图：
摘要：The battery-driven hydraulic excavator comprises an electric motor driven bypower from the battery, a hydraulic pump driven by the electric motor, and a plurality ofhydraulic actuators driven by operating oil from the hydraulic pump. There are providedsupply lines for feeding the operating oil in an oil tank from the hydraulic pump into the
hydraulic actuators. A differential pressure gauge for detecting the flow rate of
operating oil is provided in a main supply line for joining operating oil which were not fedinto the hydraulic actuators to return it to the oil tank. Control is made so that power ininverse proportion to the flow rate detected by the differential pressure gauge issupplied to the electric motor. Thereby, the life of the battery can be extended.
申请人：KABUSHIKI KAISHA KOBE SEIKO SHO also known as Kobe Steel Ltd.
地址：3-18, Wakinohama-cho 1 chome, Chuo-ku Kobe 651 JP
国籍：JP
代理机构：BROOKES & MARTIN
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