Inventor · disambiguated record
Roger P. Butterfield
Also filed as: BUTTERFIELD ROGER · BUTTERFIELD ROGER P
31 granted patents·1 pending application·1,213 citations·filing 1978–2010
98Inventor score
Files withBORGWARNER INC12BORG WARNER AUTOMOTIVE11EMERSON ELECTRIC CO4BORG WARNER2BORG WARNER TRANSMISSION1
Top patents by PatentIndex Score
32 records- 0199US5002023AVariable camshaft timing for internal combustion engineBORG WARNER AUTOMOTIVE·Filed 1989·Granted Mar 26, 1991·151 cites·30 claims
- 0298US5657725AVCT system utilizing engine oil pressure for actuationBORG WARNER AUTOMOTIVE·Filed 1996·Granted Aug 19, 1997·163 cites·14 claims
- 0398US5107804AVariable camshaft timing for internal combustion engineBORG WARNER AUTOMOTIVE·Filed 1991·Granted Apr 28, 1992·187 cites·22 claims
- 0496US5361735ABelt driven variable camshaft timing systemBORG WARNER AUTOMOTIVE·Filed 1992·Granted Nov 8, 1994·87 cites·19 claims
- 0594US7404778B2High-performance silent chainBORGWARNER INC·Filed 2007·Granted Jul 29, 2008·17 cites·13 claims
- 0693US5172659ADifferential pressure control system for variable camshaft timing systemBORG WARNER AUTOMOTIVE·Filed 1991·Granted Dec 22, 1992·123 cites·15 claims
- 0790US7318401B2Variable chamber volume phaserBORGWARNER INC·Filed 2006·Granted Jan 15, 2008·13 cites·45 claims
- 0888US4567790AMotion transmitting systemEMERSON ELECTRIC CO·Filed 1984·Granted Feb 4, 1986·44 cites·4 claims
- 0987US5367992AVariable camshaft timing system for improved operation during low hydraulic fluid pressureBORG WARNER AUTOMOTIVE·Filed 1993·Granted Nov 29, 1994·41 cites·23 claims
- 1086US7056248B2Silent chainBORGWARNER INC·Filed 2003·Granted Jun 6, 2006·21 cites·10 claims
- 1184US5046460AVariable camshaft timing for internal combustion engineBORG WARNER AUTOMOTIVE·Filed 1990·Granted Sep 10, 1991·41 cites·16 claims
- 1283US4429595AMotion transmitting deviceEMERSON ELECTRIC CO·Filed 1980·Granted Feb 7, 1984·33 cites·3 claims
- 1382US4502345AAccessory drive systemBORG WARNER·Filed 1980·Granted Mar 5, 1985·34 cites·1 claims
- 1480US4862845AVariable camshaft timing systemBORG WARNER TRANSMISSION·Filed 1988·Granted Sep 5, 1989·27 cites·31 claims
- 1579US8256393B2Variable cam timing controls mounted in the camshaftSIMPSON ROGER T·Filed 2008·Granted Sep 4, 2012·6 cites·6 claims
- 1679US6406394B1Power transmission chain having links with lateral spacing elementsBORGWARNER INC·Filed 2000·Granted Jun 18, 2002·16 cites·21 claims
- 1779US4471672AMotion transmitting systemEMERSON ELECTRIC CO·Filed 1981·Granted Sep 18, 1984·31 cites·2 claims
- 1878US5205249AVariable camshaft timing system for internal combustion engine utilizing flywheel energy for reduced camshaft torsionalsBORG WARNER AUTOMOTIVE·Filed 1992·Granted Apr 27, 1993·32 cites·25 claims
- 1977US7500928B2Randomized chain systemBORGWARNER INC·Filed 2005·Granted Mar 10, 2009·9 cites·28 claims
- 2074US6554728B2Fastenerless chain snubberBORGWARNER INC·Filed 2001·Granted Apr 29, 2003·18 cites·6 claims
- 2171US5107805ACamshaft with extra cam to increase the magnitude of torque pulsations thereinBORG WARNER AUTOMOTIVE·Filed 1991·Granted Apr 28, 1992·27 cites·26 claims
- 2267US6966289B1VCT mechanism incorporating camshaft bearing journalBORGWARNER INC·Filed 2005·Granted Nov 22, 2005·3 cites·3 claims
- 2362US6595882B2Power transmission chain having links with lateral spacing elementsBORGWARNER INC·Filed 2002·Granted Jul 22, 2003·7 cites·4 claims
- 2462US4216678ADrive systemBORG WARNER·Filed 1978·Granted Aug 12, 1980·17 cites·4 claims
- 2561US7048665B2Power transmission chain having links with lateral spacing elementsBORGWARNER INC·Filed 2003·Granted May 23, 2006·9 cites·17 claims
- 2661US5152261AVariable camshaft timing system utilizing changes in length of portions of a chain or beltBORG WARNER AUTOMOTIVE·Filed 1991·Granted Oct 6, 1992·20 cites·13 claims
- 2759US8561583B2Phaser with oil pressure assistBUTTERFIELD ROGER P·Filed 2010·Granted Oct 22, 2013·1 cites·6 claims
- 2853US4873879AVariable speed transmissionBORG WARNER AUTOMOTIVE·Filed 1987·Granted Oct 17, 1989·15 cites·4 claims
- 2946US2005049098A1High-performance silent chainBORGWARNER INC·Filed 2004·Application pending·0 cites
- 3044US4578941ALoad carrying deviceEMERSON ELECTRIC CO·Filed 1984·Granted Apr 1, 1986·8 cites·13 claims
- 3136US6497633B1Continuous manufacture of push type CVT belt bands utilizing spiral winding & welding to form tube and slitting tube to form band of predetermined widthBORGWARNER INC·Filed 1999·Granted Dec 24, 2002·10 cites·14 claims
- 3231US6123638AThree-way phased continuously variable transmission chain with strut retentionBORGWARNER INC·Filed 1999·Granted Sep 26, 2000·2 cites·6 claims
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