Inventor
RAAB FRANCIS J
US9 patents
⚠️ This page may combine multiple inventors who share the name “RAAB FRANCIS J”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
CATERPILLAR INC
6 patentsUS6541875B1Apr 1, 2003
Free piston engine with electrical power output
CATERPILLAR INC127 citations97
US6206656B1Mar 27, 2001
Method of operating a free piston internal combustion engine with high pressure hydraulic fluid upon misfire or initial start-up
CATERPILLAR INC33 citations92
US6244226B1Jun 12, 2001
Free piston internal combustion engine with rotating piston
CATERPILLAR INC30 citations91
US6854268B2Feb 15, 2005
Hydraulic control system with energy recovery
CATERPILLAR INC39 citations86
US5878649AMar 9, 1999
Controlled porting for a pressure transformer
CATERPILLAR INC17 citations82
US7634155B2Dec 15, 2009
Hybrid optical cylinder position sensor
CATERPILLAR INC5 citations59