Inventor
AOYAGI YUKIO
JP21 patents
Patents
21 patentsUS5048293ASep 17, 1991
Pump controlling apparatus for construction machine
HITACHI CONSTRUCTION MACHINERY81 citations96
US4606313AAug 19, 1986
Method of and system for controlling hydraulic power system
HITACHI CONSTRUCTION MACHINERY107 citations96
US4586330AMay 6, 1986
Control system for hydraulic circuit apparatus
HITACHI CONSTRUCTION MACHINERY72 citations96
US4510750AApr 16, 1985
Circuit pressure control system for hydrostatic power transmission
HITACHI CONSTRUCTION MACHINERY68 citations96
US4627013ADec 2, 1986
Load weight indicating system for load moving machine
HITACHI CONSTRUCTION MACHINERY80 citations95
US5295795AMar 22, 1994
Hydraulic drive system for construction machine
HITACHI CONSTRUCTION MACHINERY42 citations92
US5277027AJan 11, 1994
Hydraulic drive system with pressure compensting valve
HITACHI CONSTRUCTION MACHINERY35 citations92
US4768339ASep 6, 1988
Hydraulic drive system
HITACHI CONSTRUCTION MACHINERY72 citations92
US4571941AFeb 25, 1986
Hydraulic power system
HITACHI CONSTRUCTION MACHINERY29 citations92
US4561250ADec 31, 1985
Hydraulic drive system having a plurality of prime movers
HITACHI CONSTRUCTION MACHINERY46 citations92
US4561249ADec 31, 1985
Control system for hydraulic circuit apparatus
HITACHI CONSTRUCTION MACHINERY52 citations92
US4531369AJul 30, 1985
Flushing valve system in closed circuit hydrostatic power transmission
HITACHI CONSTRUCTION MACHINERY30 citations92
US4528813AJul 16, 1985
Control system for hydrostatic power transmission
HITACHI CONSTRUCTION MACHINERY29 citations92
US4395199AJul 26, 1983
Control method of a system of internal combustion engine and hydraulic pump
HITACHI CONSTRUCTION MACHINERY51 citations92
US5056312AOct 15, 1991
Hydraulic drive system for construction machines
HITACHI CONSTRUCTION MACHINERY47 citations91
US5488787AFeb 6, 1996
Hydraulic drive system for construction machine
HITACHI CONSTRUCTION MACHINERY36 citations90
US4587808AMay 13, 1986
Control system for hydraulic circuit means
HITACHI CONSTRUCTION MACHINERY25 citations82
US5174114ADec 29, 1992
Hydraulic drive system for construction machine
HITACHI CONSTRUCTION MACHINERY16 citations74
US4520626AJun 4, 1985
Hydraulic drive system for single rod cylinder
HITACHI CONSTRUCTION MACHINERY18 citations74
US4451893AMay 29, 1984
Control method and control system for hydrostatic drive system
HITACHI CONSTRUCTION MACHINERY8 citations74
US4464898AAug 14, 1984
Hydraulic power system
HITACHI CONSTRUCTION MACHINERY19 citations71