Inventor
WATERFIELD LARRY G
US6 patents
Patents
6 patentsUS6512323B2Jan 28, 2003
Piezoelectric actuator device
CATERPILLAR INC60 citations94
US6376966B1Apr 23, 2002
Method and apparatus for controlling a piezoelectric device
CATERPILLAR INC20 citations91
US6285115B1Sep 4, 2001
Method and apparatus for controlling position and velocity of a piezoelectric device
CATERPILLAR INC16 citations82
US6715466B2Apr 6, 2004
Method and apparatus for operating an internal combustion engine exhaust valve for braking
CATERPILLAR INC7 citations72
US6400062B1Jun 4, 2002
Method and apparatus for temperature compensating a piezoelectric device
CATERPILLAR INC7 citations72
US6933660B2Aug 23, 2005
Piezoelectric bender with increased activating force, and valve using same
CATERPILLAR INC10 citations65