Inventor
DUFFIELD MICHAEL
US11 patents
⚠️ This page may combine multiple inventors who share the name “DUFFIELD MICHAEL”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
BORGWARNER INC
6 patentsUS6763791B2Jul 20, 2004
Cam phaser for engines having two check valves in rotor between chambers and spool valve
BORGWARNER INC77 citations97
US6311655B1Nov 6, 2001
Multi-position variable cam timing system having a vane-mounted locking-piston device
BORGWARNER INC95 citations97
US6374787B2Apr 23, 2002
Multi-position variable camshaft timing system actuated by engine oil pressure
BORGWARNER INC58 citations96
US6247434B1Jun 19, 2001
Multi-position variable camshaft timing system actuated by engine oil
BORGWARNER INC55 citations96
US6883481B2Apr 26, 2005
Torsional assisted multi-position cam indexer having controls located in rotor
BORGWARNER INC45 citations92
US6814037B1Nov 9, 2004
Variable camshaft timing for internal combustion engine with actuator locking
BORGWARNER INC10 citations73