Inventor
NISHIMURA YOSHIZUMI
JP9 patents
Patents
9 patentsUS6438952B1Aug 27, 2002
Hydraulic circuit device
HITACHI CONSTRUCTION MACHINERY22 citations92
US6408876B1Jun 25, 2002
Control valve
HITACHI CONSTRUCTION MACHINERY35 citations92
US6327959B1Dec 11, 2001
Directional control valve device
HITACHI CONSTRUCTION MACHINERY23 citations92
US6422009B1Jul 23, 2002
Pump capacity control device and valve device
HITACHI CONSTRUCTION MACHINERY18 citations83
US6378302B1Apr 30, 2002
Hydraulic circuit system
HITACHI CONSTRUCTION MACHINERY17 citations83
US6453585B1Sep 24, 2002
Hydraulic drive device of working machine
HITACHI CONSTRUCTION MACHINERY9 citations73
US6135149AOct 24, 2000
Pressure compensating valves
HITACHI CONSTRUCTION MACHINERY8 citations73
US5957159ASep 28, 1999
Directional control valve with flow distribution valves
HITACHI CONSTRUCTION MACHINERY12 citations73
US6681794B2Jan 27, 2004
Unloading valve
HITACHI CONSTRUCTION MACHINERY1 citations51