Inventor
HOLTMAN RICHARD H
US18 patents
⚠️ This page may combine multiple inventors who share the name “HOLTMAN RICHARD H”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
CATERPILLAR INC
17 patentsUS6655654B1Dec 2, 2003
Piezoelectric valve system
CATERPILLAR INC29 citations95
US6895752B1May 24, 2005
Method and apparatus for exhaust gas recirculation cooling using a vortex tube to cool recirculated exhaust gases
CATERPILLAR INC27 citations92
US6739575B2May 25, 2004
Piezoelectric valve system
CATERPILLAR INC27 citations92
US6553966B2Apr 29, 2003
Method of presetting an internal combustion engine
CATERPILLAR INC28 citations92
US6354266B1Mar 12, 2002
Vehicle with engine having enhanced warm-up operation mode
CATERPILLAR INC36 citations92
US5713520AFeb 3, 1998
Fast spill device for abruptly ending injection in a hydraulically actuated fuel injector
CATERPILLAR INC23 citations92
US5787863AAug 4, 1998
Fuel system having priming actuating fluid accumulator
CATERPILLAR INC26 citations89
US5682851ANov 4, 1997
Oil system for an engine that includes an auxiliary priming pump
CATERPILLAR INC39 citations89
US7059301B2Jun 13, 2006
End of injection rate shaping
CATERPILLAR INC15 citations83
US6695283B2Feb 24, 2004
Piezoelectric valve system
CATERPILLAR INC7 citations73
US6679474B2Jan 20, 2004
Piezoelectric valve system
CATERPILLAR INC4 citations73
US6609494B2Aug 26, 2003
Emissions controller method and system
CATERPILLAR INC7 citations73
US5931644AAug 3, 1999
Precision demand axial piston pump with spring bias means for reducing cavitation
CATERPILLAR INC15 citations73
US6715466B2Apr 6, 2004
Method and apparatus for operating an internal combustion engine exhaust valve for braking
CATERPILLAR INC7 citations72
US6705588B2Mar 16, 2004
Piezoelectric valve system
CATERPILLAR INC2 citations62
US6742728B2Jun 1, 2004
Electrical actuator subassembly with external threads and fuel injector using same
CATERPILLAR INC2 citations61
US5992387ANov 30, 1999
Fuel system having priming actuating fluid reservoir
CATERPILLAR INC4 citations61