Inventor
ZIMMERMANN DANIEL E
US17 patents
Patents
17 patentsUS5523684AJun 4, 1996
Electronic solenoid control apparatus and method with hall effect technology
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US5257014AOct 26, 1993
Actuator detection method and apparatus for an electromechanical actuator
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US5953196ASep 14, 1999
Method and apparatus for an electromagnetic joystick lock with flux canceling driver circuit
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US7189158B2Mar 13, 2007
Airflow control system
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US6176684B1Jan 23, 2001
Variable displacement hydraulic piston unit with electrically operated variable displacement control and timing control
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USH1850HJun 6, 2000
Joystick having electronically controlled centering force feedback
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US5961097AOct 5, 1999
Electromagnetically actuated valve with thermal compensation
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US5953436ASep 14, 1999
Apparatus for generating an audible tone
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US5506508AApr 9, 1996
Apparatus for detecting a shorted winding condition of a solenoid coil
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US5155399AOct 13, 1992
Coil assembly for an electromechanical actuator
CATERPILLAR INC17 citations73
US7508315B2Mar 24, 2009
Signaling device and method of alerting a work machine operator to a predetermined condition using same
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US6302089B1Oct 16, 2001
Method and apparatus for controlling a rotatable shaft
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US6085722AJul 11, 2000
Exhaust restrictor with gear motor actuator and method of controlling same
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US5894264AApr 13, 1999
Apparatus for generating an audible tone
CATERPILLAR INC6 citations62
US5316044AMay 31, 1994
Hydraulic control valve having a centering spring device
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US7292136B2Nov 6, 2007
Audible signal device and machines using same
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US7268671B2Sep 11, 2007
Shaped modulation audible alarm
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