Inventor
IZUMI EIKI
JP28 patents
⚠️ This page may combine multiple inventors who share the name “IZUMI EIKI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI CONSTRUCTION MACHINERY
27 patentsUS5155996AOct 20, 1992
Hydraulic drive system for construction machine
HITACHI CONSTRUCTION MACHINERY61 citations96
US5129230AJul 14, 1992
Control system for load sensing hydraulic drive circuit
HITACHI CONSTRUCTION MACHINERY62 citations96
US4967557ANov 6, 1990
Control system for load-sensing hydraulic drive circuit
HITACHI CONSTRUCTION MACHINERY90 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
US4489551ADec 25, 1984
Failure detection system for hydraulic pump
HITACHI CONSTRUCTION MACHINERY86 citations96
US4369625AJan 25, 1983
Drive system for construction machinery and method of controlling hydraulic circuit means thereof
HITACHI CONSTRUCTION MACHINERY167 citations96
US5177964AJan 12, 1993
Hydraulic drive traveling system
HITACHI CONSTRUCTION MACHINERY64 citations95
US5285642AFeb 15, 1994
Load sensing control system for hydraulic machine
HITACHI CONSTRUCTION MACHINERY35 citations92
US4809504AMar 7, 1989
Control system for controlling input power to variable displacement hydraulic pumps of a hydraulic system
HITACHI CONSTRUCTION MACHINERY41 citations92
US4571941AFeb 25, 1986
Hydraulic power system
HITACHI CONSTRUCTION MACHINERY29 citations92
US4561249ADec 31, 1985
Control system for hydraulic circuit apparatus
HITACHI CONSTRUCTION MACHINERY52 citations92
US4561250ADec 31, 1985
Hydraulic drive system having a plurality of prime movers
HITACHI CONSTRUCTION MACHINERY46 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
US4945723AAug 7, 1990
Flow control valves for hydraulic motor system
HITACHI CONSTRUCTION MACHINERY23 citations89
US5170625ADec 15, 1992
Control system for hydraulic pump
HITACHI CONSTRUCTION MACHINERY20 citations82
US4587808AMay 13, 1986
Control system for hydraulic circuit means
HITACHI CONSTRUCTION MACHINERY25 citations82
US4558593ADec 17, 1985
Failure detection system for hydraulic pumps
HITACHI CONSTRUCTION MACHINERY17 citations74
US4520626AJun 4, 1985
Hydraulic drive system for single rod cylinder
HITACHI CONSTRUCTION MACHINERY18 citations74
US4489552ADec 25, 1984
Automatic neutral point detecting system for hydraulic pump
HITACHI CONSTRUCTION MACHINERY13 citations74
US4451893AMay 29, 1984
Control method and control system for hydrostatic drive system
HITACHI CONSTRUCTION MACHINERY8 citations74
US4565221AJan 21, 1986
Control valve assembly
HITACHI CONSTRUCTION MACHINERY7 citations72
US5085128AFeb 4, 1992
Variable displacement bent axis type hydraulic machine
HITACHI CONSTRUCTION MACHINERY2 citations62