Inventor
HAGA MASAKAZU
JP23 patents
Patents
23 patentsUS5835874ANov 10, 1998
Region limiting excavation control system for construction machine
HITACHI CONSTRUCTION MACHINERY117 citations97
US6169948B1Jan 2, 2001
Front control system, area setting method and control panel for construction machine
HITACHI CONSTRUCTION MACHINERY63 citations96
US6076029AJun 13, 2000
Slope excavation controller of hydraulic shovel, target slope setting device and slope excavation forming method
HITACHI CONSTRUCTION MACHINERY80 citations96
US5968104AOct 19, 1999
Front control system for construction machine
HITACHI CONSTRUCTION MACHINERY76 citations96
US5701691ADec 30, 1997
Region limiting excavation control system for construction machine
HITACHI CONSTRUCTION MACHINERY74 citations96
US5155996AOct 20, 1992
Hydraulic drive system for construction machine
HITACHI CONSTRUCTION MACHINERY61 citations96
US5062350ANov 5, 1991
Hydraulic drive system for civil engineering and construction machine
HITACHI CONSTRUCTION MACHINERY25 citations93
US6275757B1Aug 14, 2001
Device for controlling limited-area excavation with construction machine
HITACHI CONSTRUCTION MACHINERY57 citations92
US5957989ASep 28, 1999
Interference preventing system for construction machine
HITACHI CONSTRUCTION MACHINERY53 citations92
US5960378ASep 28, 1999
Excavation area setting system for area limiting excavation control in construction machines
HITACHI CONSTRUCTION MACHINERY44 citations92
US5918527AJul 6, 1999
Locus control system for construction machines
HITACHI CONSTRUCTION MACHINERY34 citations92
US5887365AMar 30, 1999
Front control system for construction machine and oil temperature indicator
HITACHI CONSTRUCTION MACHINERY30 citations92
US5822891AOct 20, 1998
Work area limitation control system for construction machine
HITACHI CONSTRUCTION MACHINERY38 citations92
US5752333AMay 19, 1998
Area limiting excavation control system for construction machines
HITACHI CONSTRUCTION MACHINERY48 citations92
US5735065AApr 7, 1998
Area limiting excavation control system for construction machine
HITACHI CONSTRUCTION MACHINERY55 citations92
US5267440ADec 7, 1993
Hydraulic control system for construction machine
HITACHI CONSTRUCTION MACHINERY55 citations92
US4697418AOct 6, 1987
Control system for hydraulically-operated construction machinery
HITACHI CONSTRUCTION MACHINERY53 citations92
US5074194ADec 24, 1991
Hydraulic driving method of and hydraulic driving apparatus for hydraulic machine
HITACHI CONSTRUCTION MACHINERY13 citations73
US6564480B1May 20, 2003
Working apparatus for construction machine
HITACHI CONSTRUCTION MACHINERY9 citations72
US4881450ANov 21, 1989
Drive control system for hydraulic machine
HITACHI CONSTRUCTION MACHINERY18 citations72
US6430490B1Aug 6, 2002
Hydraulic circuit control device of construction machinery
HITACHI CONSTRUCTION MACHINERY9 citations71
US5265569ANov 30, 1993
Prime mover rotational speed control system
HITACHI CONSTRUCTION MACHINERY8 citations70
US5036817AAug 6, 1991
Engine remote control system
HITACHI CONSTRUCTION MACHINERY3 citations60