Inventor · disambiguated record
Thomas J. Hajek, Jr.
Also filed as: HAJEK II THOMAS J · HAJEK JR THOMAS J · HAJEK THOMAS J · HAJEK THOMAS J II
27 granted patents·1 pending application·432 citations·filing 1977–2013
97Inventor score
Top patents by PatentIndex Score
28 records- 0195US9651067B2Hydraulic system with a dynamic sealCATERPILLAR INC·Filed 2013·Granted May 16, 2017·29 cites·4 claims
- 0287US6715403B2Independent and regenerative mode fluid control systemCATERPILLAR INC·Filed 2002·Granted Apr 6, 2004·27 cites·15 claims
- 0386US6691604B1Hydraulic system with an actuator having independent meter-in meter-out controlCATERPILLAR INC·Filed 1999·Granted Feb 17, 2004·30 cites·9 claims
- 0482US5906351AIntegrated electrohydraulic actuatorCATERPILLAR INC·Filed 1997·Granted May 25, 1999·30 cites·15 claims
- 0581US6357230B1Hydraulic ride control systemCATERPILLAR INC·Filed 1999·Granted Mar 19, 2002·50 cites·15 claims
- 0681US6199378B1Off-setting rate of pressure rise in a fluid systemCATERPILLAR INC·Filed 1999·Granted Mar 13, 2001·30 cites·7 claims
- 0779US6186044B1Fluid control system with float capabilityCATERPILLAR INC·Filed 1999·Granted Feb 13, 2001·27 cites·4 claims
- 0878US6161467AFluid control system with regenerationCATERPILLAR INC·Filed 1999·Granted Dec 19, 2000·26 cites·5 claims
- 0975US6293181B1Control system providing a float condition for a hydraulic cylinderCATERPILLAR INC·Filed 1999·Granted Sep 25, 2001·23 cites·9 claims
- 1073US6935114B2System and method for starting an engineCATERPILLAR INC·Filed 2002·Granted Aug 30, 2005·16 cites·22 claims
- 1168US6173639B1Fluid control system having float controlCATERPILLAR INC·Filed 1999·Granted Jan 16, 2001·19 cites·8 claims
- 1265US5709368AHydraulic control valve for fluid metering and cylinder protectionCATERPILLAR INC·Filed 1996·Granted Jan 20, 1998·24 cites·8 claims
- 1363US6631653B2System for definable single lever control shift pattern jointCATERPILLAR INC·Filed 2000·Granted Oct 14, 2003·11 cites·17 claims
- 1462US7210585B2Edge filter assemblyCATERPILLAR INC·Filed 2003·Granted May 1, 2007·9 cites·24 claims
- 1558US6976418B2Hydraulic system with an actuator having independent meter-in meter-out controlCATERPILLAR INC·Filed 2004·Granted Dec 20, 2005·6 cites·3 claims
- 1657US6089528APoppet valve control with sealing element providing improved load drift controlCATERPILLAR INC·Filed 1998·Granted Jul 18, 2000·13 cites·10 claims
- 1755US6321534B1Ride controlCATERPILLAR INC·Filed 1999·Granted Nov 27, 2001·23 cites·16 claims
- 1852US6572344B1Compact pump or motor with internal swash plateCATERPILLAR INC·Filed 2001·Granted Jun 3, 2003·5 cites·26 claims
- 1950US7472638B2Hydraulic system with an actuator having independent meter-in meter-out controlCATERPILLAR INC·Filed 2005·Granted Jan 6, 2009·1 cites·11 claims
- 2049US6546957B2Dual cylinder circuit having a joystick with intuitive controlCATERPILLAR INC·Filed 2000·Granted Apr 15, 2003·3 cites·10 claims
- 2148US6047944APoppet with a flow increasing element for limiting movement thereof in a poppet valveCATERPILLAR INC·Filed 1999·Granted Apr 11, 2000·9 cites·9 claims
- 2245US6701822B2Independent and regenerative mode fluid control systemCATERPILLAR INC·Filed 2002·Granted Mar 9, 2004·5 cites·15 claims
- 2341US6722258B2Dual cylinder circuit having a joystick with intuitive controlCATERPILLAR INC·Filed 2003·Granted Apr 20, 2004·0 cites·8 claims
- 2438US4183498ADraining apparatus for a fluid reservoirCATERPILLAR TRACTOR CO·Filed 1978·Granted Jan 15, 1980·7 cites·3 claims
- 2535US2004097358A1FilterFiled 2002·Application pending·0 cites
- 2633US5950989AValve interface having mismatched radiiCATERPILLAR INC·Filed 1998·Granted Sep 14, 1999·4 cites·7 claims
- 2731US4334553AResettable valve spool with kick-out memberCATERPILLAR TRACTOR CO·Filed 1980·Granted Jun 15, 1982·2 cites·1 claims
- 2829US4155534ADraining apparatus for a fluid reservoirCATERPILLAR TRACTOR CO·Filed 1977·Granted May 22, 1979·3 cites·8 claims
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