Inventor
SUGIYAMA YUKIHIKO
JP5 patents
Patents
5 patentsUS6055851AMay 2, 2000
Apparatus for diagnosing failure of hydraulic pump for work machine
HITACHI CONSTRUCTION MACHINERY86 citations96
US5995886ANov 30, 1999
System for estimating residual service time of work vehicle
HITACHI CONSTRUCTION MACHINERY26 citations92
US7500360B2Mar 10, 2009
Hydraulic driving system of construction machinery
HITACHI CONSTRUCTION MACHINERY20 citations82
US6122598ASep 19, 2000
Measurement and display of load of excavating blasted ground
HITACHI CONSTRUCTION MACHINERY7 citations73
US7175155B2Feb 13, 2007
Control valve apparatus and pressure circuit
HITACHI CONSTRUCTION MACHINERY7 citations72