Inventor · disambiguated record
David A. Pierpont
Also filed as: PIERPONT DAVID A · PIERPONT DAVID ANDREW · Pierpont David
48 granted patents·15 pending applications·1,098 citations·filing 1999–2024
98Inventor score
Files withCATERPILLAR INC50PIERPONT DAVID ANDREW5ELECTRO MOTIVE DIESEL INC2HITTLE CRAIG PHILLIP2EASLEY JR WILLIAM LANIER1
Top patents by PatentIndex Score
63 records- 0199US6412279B1Twin turbine exhaust gas re-circulation system having a second stage variable nozzle turbineCATERPILLAR INC·Filed 2000·Granted Jul 2, 2002·131 cites·21 claims
- 0299US6360732B1Exhaust gas recirculation cooling systemCATERPILLAR INC·Filed 2000·Granted Mar 26, 2002·144 cites·14 claims
- 0398US6324847B1Dual flow turbine housing for a turbocharger in a divided manifold exhaust system having E.G.R. flowCATERPILLAR INC·Filed 2000·Granted Dec 4, 2001·125 cites·14 claims
- 0494US6484500B1Two turbocharger engine emission control systemCATERPILLAR INC·Filed 2001·Granted Nov 26, 2002·54 cites·20 claims
- 0593US8196403B2Turbocharger having balance valve, wastegate, and common actuatorHITTLE CRAIG PHILLIP·Filed 2008·Granted Jun 12, 2012·38 cites·18 claims
- 0693US6378509B1Exhaust gas recirculation system having multifunction valveCATERPILLAR INC·Filed 2000·Granted Apr 30, 2002·61 cites·25 claims
- 0792US9328693B2Piston, engine and operating method for reduced production of particulate matterELECTRO MOTIVE DIESEL INC·Filed 2013·Granted May 3, 2016·15 cites·20 claims
- 0892US6321537B1Exhaust gas recirculation system in an internal combustion engineCATERPILLAR INC·Filed 2000·Granted Nov 27, 2001·39 cites·24 claims
- 0991US9238996B2Piston having combustion bowl shaped to balance combustion efficiency and emission propertiesCATERPILLAR INC·Filed 2015·Granted Jan 19, 2016·6 cites·19 claims
- 1091US8978621B2Piston having combustion bowl shaped to balance combustion efficiency and emission propertiesEASLEY WILLIAM L·Filed 2011·Granted Mar 17, 2015·16 cites·18 claims
- 1191US8161747B2Exhaust system having series turbochargers and EGRPIERPONT DAVID ANDREW·Filed 2008·Granted Apr 24, 2012·20 cites·16 claims
- 1291US7891345B2EGR system having multiple discharge locationsCATERPILLAR INC·Filed 2008·Granted Feb 22, 2011·18 cites·20 claims
- 1389US8297053B2Exhaust system having parallel asymmetric turbochargers and EGRGLADDEN JOHN R·Filed 2008·Granted Oct 30, 2012·18 cites·19 claims
- 1489US7347171B2Engine valve actuator providing Miller cycle benefitsCATERPILLAR INC·Filed 2002·Granted Mar 25, 2008·28 cites·14 claims
- 1588US8096124B2Exhaust system having parallel asymmetric turbochargers and EGRPIERPONT DAVID ANDREW·Filed 2008·Granted Jan 17, 2012·19 cites·20 claims
- 1688US6460519B1Twin turbine exhaust gas re-circulation system having fixed geometry turbinesCATERPILLAR INC·Filed 2000·Granted Oct 8, 2002·29 cites·20 claims
- 1787US9234451B2Piston having combustion bowl shaped to balance combustion efficiency and emission propertiesCATERPILLAR INC·Filed 2013·Granted Jan 12, 2016·13 cites·19 claims
- 1887US6439212B1Bypass venturi assembly and elbow with turning vane for an exhaust gas recirculation systemCATERPILLAR INC·Filed 2001·Granted Aug 27, 2002·28 cites·13 claims
- 1986US10113503B2Combustion bowl of a piston for an engineCATERPILLAR INC·Filed 2016·Granted Oct 30, 2018·5 cites·19 claims
- 2085US8176737B2Exhaust system having 3-way valvePIERPONT DAVID ANDREW·Filed 2008·Granted May 15, 2012·16 cites·24 claims
- 2184US6484499B2Twin variable nozzle turbine exhaust gas recirculation systemCATERPILLAR INC·Filed 2001·Granted Nov 26, 2002·23 cites·19 claims
- 2283US6883314B2Cooling of engine combustion airCATERPILLAR INC·Filed 2002·Granted Apr 26, 2005·42 cites·49 claims
- 2383US6397598B1Turbocharger system for an internal combustion engineCATERPILLAR INC·Filed 2000·Granted Jun 4, 2002·27 cites·12 claims
- 2481US10787976B1System and method for estimating cylinder pressureCATERPILLAR INC·Filed 2019·Granted Sep 29, 2020·2 cites·20 claims
- 2581US8234864B2Engine system having multi-stage turbocharging and exhaust gas recirculationEASLEY JR WILLIAM LANIER·Filed 2008·Granted Aug 7, 2012·15 cites·20 claims
- 2680US8938962B2Exhaust systemPIERPONT DAVID ANDREW·Filed 2012·Granted Jan 27, 2015·4 cites·16 claims
- 2778US6659092B2Bypass assembly with annular bypass venturi for an exhaust gas recirculation systemCATERPILLAR INC·Filed 2001·Granted Dec 9, 2003·18 cites·20 claims
- 2877US6418721B1Two turbocharger exhaust gas re-circulation system having a first stage variable nozzle turbineCATERPILLAR INC·Filed 2001·Granted Jul 16, 2002·17 cites·22 claims
- 2975US6609373B2Exhaust gas recirculation system with variable geometry turbine and bypass venturi assemblyCATERPILLAR INC·Filed 2001·Granted Aug 26, 2003·19 cites·17 claims
- 3074US6220233B1Exhaust gas recirculation system having variable valve timing and method of using same in an internal combustion engineCATERPILLAR INC·Filed 1999·Granted Apr 24, 2001·29 cites·20 claims
- 3167US2024234755A9Hybrid hydrogen fuel cell combustor power systemCATERPILLAR INC·Filed 2022·Application pending·0 cites
- 3267US2025167269A1Systems and methods of accelerating fuel cell start-up and warm-up timesCATERPILLAR INC·Filed 2023·Application pending·0 cites
- 3366US6928969B2System and method for controlling engine operationCATERPILLAR INC·Filed 2002·Granted Aug 16, 2005·8 cites·42 claims
- 3466US6640542B2Bypass venturi assembly with single shaft actuator for an exhaust gas recirculation systemCATERPILLAR INC·Filed 2001·Granted Nov 4, 2003·20 cites·21 claims
- 3562US7006910B2Engine power loss compensationCATERPILLAR INC·Filed 2003·Granted Feb 28, 2006·11 cites·24 claims
- 3661US2025246664A1Manifold for fuel cell stacksCATERPILLAR INC·Filed 2024·Application pending·0 cites
- 3760US6658848B1Airflow system for engine with series turbochargersCATERPILLAR INC·Filed 2002·Granted Dec 9, 2003·15 cites·20 claims
- 3857US6799552B2System and method for controlling engine operationCATERPILLAR INC·Filed 2002·Granted Oct 5, 2004·9 cites·30 claims
- 3956US7063055B2Engine valve actuation system and methodCATERPILLAR INC·Filed 2004·Granted Jun 20, 2006·4 cites·26 claims
- 4056US6807929B2Engine valve actuation system and methodCATERPILLAR INC·Filed 2002·Granted Oct 26, 2004·4 cites·28 claims
- 4153US10830168B1System and method for estimating exhaust manifold temperatureCATERPILLAR INC·Filed 2019·Granted Nov 10, 2020·0 cites·20 claims
- 4252US6912458B2Variable valve actuation control for operation at altitudeCATERPILLAR INC·Filed 2003·Granted Jun 28, 2005·6 cites·22 claims
- 4351US10982608B2System and method for estimating engine performanceCATERPILLAR INC·Filed 2019·Granted Apr 20, 2021·0 cites·20 claims
- 4451US2012222419A1Turbocharger having balance valve, wastegate, and common actuatorHITTLE CRAIG PHILLIP·Filed 2012·Application pending·0 cites
- 4547US2008081734A1Power systemCATERPILLAR INC·Filed 2006·Application pending·0 cites
- 4646US11230992B2Piston geometry for reduced smoke and cylinder head component temperaturesCATERPILLAR INC·Filed 2020·Granted Jan 25, 2022·0 cites·19 claims
- 4746US2006011159A1System and method for controlling engine operationCATERPILLAR INC·Filed 2005·Application pending·0 cites
- 4845US11560829B2Recirculation system for a power system that includes a plurality of turbochargersCATERPILLAR INC·Filed 2020·Granted Jan 24, 2023·0 cites·18 claims
- 4944US7100552B2Control system and method for variable valve actuation systemCATERPILLAR INC·Filed 2002·Granted Sep 5, 2006·2 cites·36 claims
- 5044US2015020765A1Combustion bowl of pistonELECTRO MOTIVE DIESEL INC·Filed 2013·Application pending·0 cites
Showing the top 50 of 63 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →