TJ

Thomas J. Hajek, Jr.

Caterpillar: 26 patents #114 of 8,398Top 2%
SM Shin Caterpillar Mitsubishi: 2 patents #38 of 184Top 25%
📍 Joliet, IL: #6 of 318 inventorsTop 2%
🗺 Illinois: #2,532 of 84,256 inventorsTop 4%
Overall (All Time): #154,987 of 4,157,543Top 4%
26
Patents All Time

Issued Patents All Time

Showing 1–25 of 26 patents

Patent #TitleCo-InventorsDate
9651067 Hydraulic system with a dynamic seal Matthew J. Beschorner, Eric C. Hughes, Mikhail A. Sorokine, James A. Aardema, Aleksandra M. Egelja 2017-05-16
7472638 Hydraulic system with an actuator having independent meter-in meter-out control Vincent Triffaux 2009-01-06
7210585 Edge filter assembly 2007-05-01
6976418 Hydraulic system with an actuator having independent meter-in meter-out control Vincent Triffaux 2005-12-20
6935114 System and method for starting an engine David P. Smith 2005-08-30
6722258 Dual cylinder circuit having a joystick with intuitive control 2004-04-20
6715403 Independent and regenerative mode fluid control system Srikrishnan T. Tolappa 2004-04-06
6701822 Independent and regenerative mode fluid control system Srikrishnan T. Tolappa, James D. Linderode 2004-03-09
6691604 Hydraulic system with an actuator having independent meter-in meter-out control Vincent Triffaux 2004-02-17
6631653 System for definable single lever control shift pattern joint Chad T. Brickner, John R. Connolly, Paul Gilbert, Rudy V. Mills, David P. Smith 2003-10-14
6572344 Compact pump or motor with internal swash plate David P. Smith 2003-06-03
6546957 Dual cylinder circuit having a joystick with intuitive control 2003-04-15
6357230 Hydraulic ride control system Michael A. A'Hearn, David J. Carlson, Andy Hatcher, Michael Hudson, Patrick Quinn +1 more 2002-03-19
6321534 Ride control Michael A. A'Hearn, Michael Hudson, Lawrence F. Schexnayder, Srikrishnan T. Tolappa 2001-11-27
6293181 Control system providing a float condition for a hydraulic cylinder Srikrishnan T. Tolappa, Daniel T. Mather 2001-09-25
6199378 Off-setting rate of pressure rise in a fluid system James A. Aardema, Douglas W. Koehler, Edward William Mate, Vincent Triffaux 2001-03-13
6186044 Fluid control system with float capability Srikrishnan T. Tolappa 2001-02-13
6173639 Fluid control system having float control Michael A. A'Hearn, Srikrishnan T. Tolappa 2001-01-16
6161467 Fluid control system with regeneration Michael A. A'Hearn, Tony L. Marcott, Srikrishnan T. Tolappa 2000-12-19
6089528 Poppet valve control with sealing element providing improved load drift control Srikrishnan T. Tolappa 2000-07-18
6047944 Poppet with a flow increasing element for limiting movement thereof in a poppet valve 2000-04-11
5950989 Valve interface having mismatched radii Srikrishnan T. Tolappa 1999-09-14
5906351 Integrated electrohydraulic actuator James A. Aardema, Edward William Mate, Srikrishnan T. Tolappa 1999-05-25
5709368 Hydraulic control valve for fluid metering and cylinder protection 1998-01-20
4334553 Resettable valve spool with kick-out member Larry W. Lorimor 1982-06-15