Inventor · disambiguated record
Ronald J. Pierik
Also filed as: PIERIK RONALD J · PIERIK RONALD JAY
55 granted patents·3 pending applications·965 citations·filing 1989–2013
99Inventor score
Files withDELPHI TECH INC33GM GLOBAL TECH OPERATIONS INC9GEN MOTORS CORP6GM GLOBAL TECH OPERATIONS LLC2PIERIK RONALD J2
Top patents by PatentIndex Score
58 records- 0198US5680837APlanetary cam phaser with worm electric actuatorGEN MOTORS CORP·Filed 1996·Granted Oct 28, 1997·122 cites·11 claims
- 0296US5937809AVariable valve timing mechanismsGEN MOTORS CORP·Filed 1998·Granted Aug 17, 1999·88 cites·14 claims
- 0396US5067467AIntensifier-injector for gaseous fuel for positive displacement enginesUNIV BRITISH COLUMBIA·Filed 1989·Granted Nov 26, 1991·73 cites·48 claims
- 0495US6311659B1Desmodromic cam driven variable valve timing mechanismDELPHI TECH INC·Filed 2000·Granted Nov 6, 2001·50 cites·15 claims
- 0595US6019076AVariable valve timing mechanismGEN MOTORS CORP·Filed 1998·Granted Feb 1, 2000·92 cites·8 claims
- 0694US6799544B1Method and apparatus for actuating a cam phaserDELPHI TECH INC·Filed 2003·Granted Oct 5, 2004·38 cites·3 claims
- 0792US6439177B2Low friction variable valve actuation deviceDELPHI TECH INC·Filed 2001·Granted Aug 27, 2002·35 cites·10 claims
- 0892US5680836APlanetary cam phaser with lash compensationGEN MOTORS CORP·Filed 1996·Granted Oct 28, 1997·53 cites·11 claims
- 0991US5327859AEngine timing drive with fixed and variable phasingGEN MOTORS CORP·Filed 1993·Granted Jul 12, 1994·61 cites·9 claims
- 1090US7401582B2Camshaft phaser having designated contact vaneDELPHI TECH INC·Filed 2006·Granted Jul 22, 2008·9 cites·13 claims
- 1187US7827944B2System for controlling the response time of a hydraulic systemGM GLOBAL TECH OPERATIONS INC·Filed 2006·Granted Nov 9, 2010·10 cites·11 claims
- 1286US8955500B2Positive crankcase ventilation systemGM GLOBAL TECH OPERATIONS INC·Filed 2013·Granted Feb 17, 2015·5 cites·16 claims
- 1386US6378474B1Variable value timing mechanism with crank driveDELPHI TECH INC·Filed 2000·Granted Apr 30, 2002·24 cites·13 claims
- 1484US7849828B2Rocker arm assemblyGM GLOBAL TECH OPERATIONS INC·Filed 2008·Granted Dec 14, 2010·9 cites·20 claims
- 1583US6386161B2Cam link variable valve mechanismDELPHI TECH INC·Filed 2001·Granted May 14, 2002·20 cites·21 claims
- 1681US6401677B1Cam rocker variable valve train deviceDELPHI TECH INC·Filed 2001·Granted Jun 11, 2002·20 cites·9 claims
- 1778US8096275B2Camshaft having a tuned mass damperMARRIOTT CRAIG D·Filed 2009·Granted Jan 17, 2012·6 cites·20 claims
- 1878US6745734B2Variable valve actuating mechanism having torsional lash control springDELPHI TECH INC·Filed 2002·Granted Jun 8, 2004·15 cites·21 claims
- 1978US6382151B2Ring gear variable valve train deviceDELPHI TECH INC·Filed 2001·Granted May 7, 2002·16 cites·11 claims
- 2076US8776741B2Engine assembly including cam phaser assembly aid pinNEAL TIMOTHY L·Filed 2011·Granted Jul 15, 2014·4 cites·2 claims
- 2176US6732690B2Camshaft phaser having an external bias springDELPHI TECH INC·Filed 2003·Granted May 11, 2004·14 cites·10 claims
- 2275US7980216B2Rocker arm assembly having slider roller oil pumping featuresGM GLOBAL TECH OPERATIONS INC·Filed 2008·Granted Jul 19, 2011·5 cites·20 claims
- 2375US6722329B2Locking pin mechanism for a camshaft phaserDELPHI TECH INC·Filed 2003·Granted Apr 20, 2004·9 cites·11 claims
- 2474US6691656B1Cam phaser hydraulic seal assemblyDELPHI TECH INC·Filed 2002·Granted Feb 17, 2004·13 cites·12 claims
- 2573US9878289B2Fluid treatment apparatus and method of using sameTWOTHIRDS WATER INC·Filed 2013·Granted Jan 30, 2018·4 cites·20 claims
- 2672US6295958B2Linkless variable valve actuation mechanismDELPHI TECH INC·Filed 2001·Granted Oct 2, 2001·12 cites·19 claims
- 2771US8047065B2Diagnostic system for valve actuation camshaft driven component compensationGM GLOBAL TECH OPERATIONS INC·Filed 2009·Granted Nov 1, 2011·6 cites·18 claims
- 2871US7556000B2Camshaft phaser having designated contact vaneDELPHI TECH INC·Filed 2003·Granted Jul 7, 2009·8 cites·2 claims
- 2971US6722330B2Retention bolt for a cam phaserDELPHI TECH INC·Filed 2003·Granted Apr 20, 2004·8 cites·11 claims
- 3071US6422188B2Actuator for variable valve mechanismDELPHI TECH INC·Filed 2001·Granted Jul 23, 2002·14 cites·20 claims
- 3168US6868811B2Frameless variable valve actuation mechanismDELPHI TECH INC·Filed 2003·Granted Mar 22, 2005·11 cites·30 claims
- 3268US6439178B1Mechanical lash adjuster apparatus for an engine camDELPHI TECH INC·Filed 2001·Granted Aug 27, 2002·10 cites·7 claims
- 3365US9512749B2System and method for calibrating a valve lift sensor and evaluating a valve lift sensor and a hydraulic valve actuatorPIERIK RONALD J·Filed 2012·Granted Dec 6, 2016·1 cites·22 claims
- 3465US6484675B2Hydraulic actuator for variable valve mechanismDELPHI TECH INC·Filed 2001·Granted Nov 26, 2002·9 cites·8 claims
- 3563US9611769B2System and method for controlling airflow through a ventilation system of an engine when cylinders of the engine are deactivatedGM GLOBAL TECH OPERATIONS LLC·Filed 2013·Granted Apr 4, 2017·1 cites·20 claims
- 3663US6532924B1Variable valve actuating mechanism having automatic lash adjustment meansDELPHI TECH INC·Filed 2002·Granted Mar 18, 2003·9 cites·21 claims
- 3762US8448617B2Engine including camshaft with partial lobeCLEVER GLENN E·Filed 2010·Granted May 28, 2013·1 cites·8 claims
- 3862US6591802B1Variable valve actuating mechanism having a rotary hydraulic lash adjusterDELPHI TECH INC·Filed 2002·Granted Jul 15, 2003·8 cites·18 claims
- 3961US6758180B2Pinless roller finger followerDELPHI TECH INC·Filed 2001·Granted Jul 6, 2004·7 cites·24 claims
- 4059US8683965B2Engine assembly including camshaft actuatorPIERIK RONALD JAY·Filed 2011·Granted Apr 1, 2014·2 cites·12 claims
- 4158US9863293B2Variable valve actuation system including an accumulator and a method for controlling the variable valve actuation systemPIERIK RONALD J·Filed 2012·Granted Jan 9, 2018·1 cites·22 claims
- 4258US6422189B1Mechanical lash control apparatus for an engine camDELPHI TECH INC·Filed 2001·Granted Jul 23, 2002·6 cites·3 claims
- 4357US6382153B1Partial internal guide for curved helical compression springDELPHI TECH INC·Filed 2001·Granted May 7, 2002·7 cites·16 claims
- 4455US6786185B2Variable valve actuation mechanism having partial wrap bearings for output cams and framesDELPHI TECH INC·Filed 2002·Granted Sep 7, 2004·5 cites·18 claims
- 4555US6736096B2Method and apparatus for setting valve lift within a cylinderDELPHI TECH INC·Filed 2002·Granted May 18, 2004·5 cites·21 claims
- 4653US5666931AIntegrated engine dilution controlGEN MOTORS CORP·Filed 1996·Granted Sep 16, 1997·23 cites·11 claims
- 4751US6736095B2Extended duration cam lobe for variable valve actuation mechanismDELPHI TECH INC·Filed 2001·Granted May 18, 2004·4 cites·8 claims
- 4851US6382152B2Crank gear variable valve actuating mechanismDELPHI TECH INC·Filed 2001·Granted May 7, 2002·4 cites·13 claims
- 4948US9523465B2Lubrication system thermostat, and method thereofGM GLOBAL TECH OPERATIONS LLC·Filed 2013·Granted Dec 20, 2016·0 cites·11 claims
- 5048US9353655B2Oil pump control systems and methods for noise minimizationGM GLOBAL TECH OPERATIONS INC·Filed 2013·Granted May 31, 2016·0 cites·12 claims
Showing the top 50 of 58 patent records by PatentIndex Score.
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