Inventor
BUTTERFIELD ROGER P
US30 patents
⚠️ This page may combine multiple inventors who share the name “BUTTERFIELD ROGER P”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
BORG WARNER AUTOMOTIVE
11 patentsUS5002023AMar 26, 1991
Variable camshaft timing for internal combustion engine
BORG WARNER AUTOMOTIVE151 citations99
US5657725AAug 19, 1997
VCT system utilizing engine oil pressure for actuation
BORG WARNER AUTOMOTIVE163 citations98
US5107804AApr 28, 1992
Variable camshaft timing for internal combustion engine
BORG WARNER AUTOMOTIVE187 citations98
US5361735ANov 8, 1994
Belt driven variable camshaft timing system
BORG WARNER AUTOMOTIVE87 citations96
US5172659ADec 22, 1992
Differential pressure control system for variable camshaft timing system
BORG WARNER AUTOMOTIVE123 citations93
US5205249AApr 27, 1993
Variable camshaft timing system for internal combustion engine utilizing flywheel energy for reduced camshaft torsionals
BORG WARNER AUTOMOTIVE32 citations92
US5107805AApr 28, 1992
Camshaft with extra cam to increase the magnitude of torque pulsations therein
BORG WARNER AUTOMOTIVE27 citations92
US5046460ASep 10, 1991
Variable camshaft timing for internal combustion engine
BORG WARNER AUTOMOTIVE41 citations92
US5367992ANov 29, 1994
Variable camshaft timing system for improved operation during low hydraulic fluid pressure
BORG WARNER AUTOMOTIVE41 citations91
US5152261AOct 6, 1992
Variable camshaft timing system utilizing changes in length of portions of a chain or belt
BORG WARNER AUTOMOTIVE20 citations82
US4873879AOct 17, 1989
Variable speed transmission
BORG WARNER AUTOMOTIVE15 citations70
BORGWARNER INC
10 patentsUS7056248B2Jun 6, 2006
Silent chain
BORGWARNER INC21 citations92
US6406394B1Jun 18, 2002
Power transmission chain having links with lateral spacing elements
BORGWARNER INC16 citations89
US7404778B2Jul 29, 2008
High-performance silent chain
BORGWARNER INC17 citations84
US7318401B2Jan 15, 2008
Variable chamber volume phaser
BORGWARNER INC13 citations83
US6554728B2Apr 29, 2003
Fastenerless chain snubber
BORGWARNER INC18 citations79
US6595882B2Jul 22, 2003
Power transmission chain having links with lateral spacing elements
BORGWARNER INC7 citations70
US7048665B2May 23, 2006
Power transmission chain having links with lateral spacing elements
BORGWARNER INC9 citations67
US6497633B1Dec 24, 2002
Continuous manufacture of push type CVT belt bands utilizing spiral winding & welding to form tube and slitting tube to form band of predetermined width
BORGWARNER INC10 citations64
US6966289B1Nov 22, 2005
VCT mechanism incorporating camshaft bearing journal
BORGWARNER INC3 citations63
US6123638ASep 26, 2000
Three-way phased continuously variable transmission chain with strut retention
BORGWARNER INC2 citations63
EMERSON ELECTRIC CO
4 patentsUS4429595AFeb 7, 1984
Motion transmitting device
EMERSON ELECTRIC CO33 citations92
US4567790AFeb 4, 1986
Motion transmitting system
EMERSON ELECTRIC CO44 citations89
US4471672ASep 18, 1984
Motion transmitting system
EMERSON ELECTRIC CO31 citations89
US4578941AApr 1, 1986
Load carrying device
EMERSON ELECTRIC CO8 citations74