Inventor
HAJEK JR THOMAS J
US21 patents
Patents
21 patentsUS6715403B2Apr 6, 2004
Independent and regenerative mode fluid control system
CATERPILLAR INC27 citations92
US6321534B1Nov 27, 2001
Ride control
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US6293181B1Sep 25, 2001
Control system providing a float condition for a hydraulic cylinder
CATERPILLAR INC23 citations92
US6186044B1Feb 13, 2001
Fluid control system with float capability
CATERPILLAR INC27 citations92
US6161467ADec 19, 2000
Fluid control system with regeneration
CATERPILLAR INC26 citations92
US5709368AJan 20, 1998
Hydraulic control valve for fluid metering and cylinder protection
CATERPILLAR INC24 citations92
US6199378B1Mar 13, 2001
Off-setting rate of pressure rise in a fluid system
CATERPILLAR INC30 citations91
US5906351AMay 25, 1999
Integrated electrohydraulic actuator
CATERPILLAR INC30 citations91
US6691604B1Feb 17, 2004
Hydraulic system with an actuator having independent meter-in meter-out control
CATERPILLAR INC30 citations90
US6357230B1Mar 19, 2002
Hydraulic ride control system
CATERPILLAR INC50 citations90
US6173639B1Jan 16, 2001
Fluid control system having float control
CATERPILLAR INC19 citations83
US6089528AJul 18, 2000
Poppet valve control with sealing element providing improved load drift control
CATERPILLAR INC13 citations73
US6047944AApr 11, 2000
Poppet with a flow increasing element for limiting movement thereof in a poppet valve
CATERPILLAR INC9 citations73
US6631653B2Oct 14, 2003
System for definable single lever control shift pattern joint
CATERPILLAR INC11 citations72
US6976418B2Dec 20, 2005
Hydraulic system with an actuator having independent meter-in meter-out control
CATERPILLAR INC6 citations71
US6572344B1Jun 3, 2003
Compact pump or motor with internal swash plate
CATERPILLAR INC5 citations63
US6546957B2Apr 15, 2003
Dual cylinder circuit having a joystick with intuitive control
CATERPILLAR INC3 citations62
US5950989ASep 14, 1999
Valve interface having mismatched radii
CATERPILLAR INC4 citations62
US6701822B2Mar 9, 2004
Independent and regenerative mode fluid control system
CATERPILLAR INC5 citations57
US6722258B2Apr 20, 2004
Dual cylinder circuit having a joystick with intuitive control
CATERPILLAR INC0 citations52
US7472638B2Jan 6, 2009
Hydraulic system with an actuator having independent meter-in meter-out control
CATERPILLAR INC1 citations50