Inventor
ICHIRYU KEN
JP26 patents
⚠️ This page may combine multiple inventors who share the name “ICHIRYU KEN”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI LTD
17 patentsUS4529362AJul 16, 1985
Servo pump for hydraulic systems
HITACHI LTD62 citations96
US4529974AJul 16, 1985
Fluid leakage detecting apparatus
HITACHI LTD68 citations96
US4175589ANov 27, 1979
Fluid pressure drive device
HITACHI LTD102 citations94
US4500865AFeb 19, 1985
Fluid leakage detecting element
HITACHI LTD28 citations92
US4012653AMar 15, 1977
Low noise alternating current dynamoelectro machine
HITACHI LTD44 citations92
US4038848AAug 2, 1977
Method and apparatus for controlling eccentricity of rolls in rolling mill
HITACHI LTD34 citations90
US3945468AMar 23, 1976
Sound preventive device for use in elevator
HITACHI LTD21 citations82
US4788902ADec 6, 1988
Thrust hydrostatic bearing device for use in axial piston machine
HITACHI LTD21 citations80
US4534452AAug 13, 1985
Hydraulic elevator
HITACHI LTD24 citations79
US3955649AMay 11, 1976
Device for correcting floor level of hydraulic elevator
HITACHI LTD20 citations79
US4544129AOct 1, 1985
Direct-acting servo valve
HITACHI LTD12 citations74
US4735233AApr 5, 1988
Rotary valve
HITACHI LTD12 citations73
US4464978AAug 14, 1984
Servovalve apparatus
HITACHI LTD7 citations73
US4428559AJan 31, 1984
Direct drive type servo valve
HITACHI LTD8 citations73
US4036041AJul 19, 1977
Gage control system for rolling mill
HITACHI LTD10 citations71
US4215723AAug 5, 1980
Fluid pressure servo valve assembly
HITACHI LTD17 citations69
US4404892ASep 20, 1983
Hydraulic operating apparatus
HITACHI LTD4 citations61
HITACHI CONSTRUCTION MACHINERY
7 patentsUS5144843ASep 8, 1992
Pressure sensor
HITACHI CONSTRUCTION MACHINERY76 citations95
US5861577AJan 19, 1999
Seal structure for member-passing-through hole bored in metal partition member
HITACHI CONSTRUCTION MACHINERY38 citations92
US4919390AApr 24, 1990
Solenoid operated valve apparatus
HITACHI CONSTRUCTION MACHINERY42 citations92
US6074023AJun 13, 2000
Guide roller assembly for crawler type vehicles and method for forming guide roller
HITACHI CONSTRUCTION MACHINERY40 citations89
US4813447AMar 21, 1989
Flow control valve apparatus
HITACHI CONSTRUCTION MACHINERY23 citations79
US5187017AFeb 16, 1993
Sliding member, and method and apparatus for producing the same by gas sulphonitriding
HITACHI CONSTRUCTION MACHINERY11 citations71
US5290369AMar 1, 1994
Method of gas sulphonitriding
HITACHI CONSTRUCTION MACHINERY3 citations60