Inventor
TANAKA SOTARO
JP7 patents
Patents
7 patentsUS5839397ANov 24, 1998
Engine cooling system and construction machine
HITACHI CONSTRUCTION MACHINERY74 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
US6244048B1Jun 12, 2001
Hydraulique drive device
HITACHI CONSTRUCTION MACHINERY37 citations91
US6502499B2Jan 7, 2003
Hydraulic recovery system for construction machine and construction machine using the same
HITACHI CONSTRUCTION MACHINERY15 citations76
US4534268AAug 13, 1985
Hydraulic fluid circuit of hydraulic shovel
HITACHI CONSTRUCTION MACHINERY10 citations71
US4504185AMar 12, 1985
Hydraulic circuit of hydraulic power shovel
HITACHI CONSTRUCTION MACHINERY8 citations71