Inventor
TOYOOKA TSUKASA
JP26 patents
⚠️ This page may combine multiple inventors who share the name “TOYOOKA TSUKASA”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI CONSTRUCTION MACHINERY
23 patentsUS7127887B2Oct 31, 2006
Oil pressure circuit for working machines
HITACHI CONSTRUCTION MACHINERY31 citations93
US5974796ANov 2, 1999
Hydraulic circuit system for hydraulic working machine
HITACHI CONSTRUCTION MACHINERY29 citations93
US5940997AAug 24, 1999
Hydraulic circuit system for hydraulic working machine
HITACHI CONSTRUCTION MACHINERY33 citations93
US5673558AOct 7, 1997
Hydraulic circuit system for hydraulic excavator
HITACHI CONSTRUCTION MACHINERY38 citations93
US7272928B2Sep 25, 2007
Hydraulic circuit of construction machinery
HITACHI CONSTRUCTION MACHINERY24 citations92
US7076947B2Jul 18, 2006
Hydraulic circuit of construction machinery
HITACHI CONSTRUCTION MACHINERY28 citations92
US6691510B2Feb 17, 2004
Pipe breakage control valve device
HITACHI CONSTRUCTION MACHINERY23 citations92
US5930996AAug 3, 1999
Auto-acceleration system for prime mover of hydraulic construction machine and control system for prime mover and hydraulic pump
HITACHI CONSTRUCTION MACHINERY28 citations92
US5911506AJun 15, 1999
Control system for prime mover and hydraulic pump of hydraulic construction machine
HITACHI CONSTRUCTION MACHINERY37 citations92
US5890303AApr 6, 1999
Hydraulic by-pass circuit for a hydraulic shovel
HITACHI CONSTRUCTION MACHINERY29 citations92
US5848531ADec 15, 1998
Hydraulic drive system for construction machines
HITACHI CONSTRUCTION MACHINERY36 citations92
US5829252ANov 3, 1998
Hydraulic system having tandem hydraulic function
HITACHI CONSTRUCTION MACHINERY37 citations92
US5479778AJan 2, 1996
Hydraulic control system for construction machines
HITACHI CONSTRUCTION MACHINERY33 citations92
US6220028B1Apr 24, 2001
Hydraulic drive system for hydraulic work vehicle
HITACHI CONSTRUCTION MACHINERY30 citations91
US6619037B1Sep 16, 2003
Hydraulic driving device of civil engineering and construction machinery
HITACHI CONSTRUCTION MACHINERY13 citations84
US7712565B2May 11, 2010
HST travel system for working machine
HITACHI CONSTRUCTION MACHINERY11 citations83
US6241212B1Jun 5, 2001
Hose rupture control valve unit
HITACHI CONSTRUCTION MACHINERY16 citations79
US6212886B1Apr 10, 2001
Hydraulic drive system and directional control valve apparatus in hydraulic machine
HITACHI CONSTRUCTION MACHINERY14 citations74
US5907951AJun 1, 1999
Hydraulic control system for construction machine
HITACHI CONSTRUCTION MACHINERY16 citations74
US5813311ASep 29, 1998
Hydraulic control system for hydraulic working machine
HITACHI CONSTRUCTION MACHINERY12 citations73
US6101456AAug 8, 2000
Output correcting method in control system, control system, and hydraulic pump control system
HITACHI CONSTRUCTION MACHINERY12 citations72
US6161586ADec 19, 2000
Tournament oil path constituting apparatus
HITACHI CONSTRUCTION MACHINERY13 citations69
US7114591B2Oct 3, 2006
Steering system for working truck
HITACHI CONSTRUCTION MACHINERY4 citations59