Inventor · disambiguated record
Gregory W. Hefler
Also filed as: HEFLER GREGORY W · HEFLER GREGORY WILLIAM
27 granted patents·2 pending applications·1,071 citations·filing 1990–2011
97Inventor score
Top patents by PatentIndex Score
29 records- 0198US5738075AHydraulically-actuated fuel injector with direct control needle valveCATERPILLAR INC·Filed 1997·Granted Apr 14, 1998·103 cites·20 claims
- 0298US5697342AHydraulically-actuated fuel injector with direct control needle valveCATERPILLAR INC·Filed 1996·Granted Dec 16, 1997·121 cites·43 claims
- 0398US5687693AHydraulically-actuated fuel injector with direct control needle valveCATERPILLAR INC·Filed 1996·Granted Nov 18, 1997·107 cites·20 claims
- 0497US5669355AHydraulically-actuated fuel injector with direct control needle valveCATERPILLAR INC·Filed 1996·Granted Sep 23, 1997·95 cites·20 claims
- 0597US5479901AElectro-hydraulic spool control valve assembly adapted for a fuel injectorCATERPILLAR INC·Filed 1994·Granted Jan 2, 1996·106 cites·15 claims
- 0696US5682858AHydraulically-actuated fuel injector with pressure spike relief valveCATERPILLAR INC·Filed 1996·Granted Nov 4, 1997·89 cites·20 claims
- 0795US5628293AElectronically-controlled fluid injector system having pre-injection pressurizable fluid storage chamber and direct-operated checkCATERPILLAR INC·Filed 1995·Granted May 13, 1997·77 cites·57 claims
- 0895US5551398AElectronically-controlled fluid injector system having pre-injection pressurizable fluid storage chamber and direct-operated checkCATERPILLAR INC·Filed 1995·Granted Sep 3, 1996·68 cites·24 claims
- 0992US5826562APiston and barrell assembly with stepped top and hydraulically-actuated fuel injector utilizing sameCATERPILLAR INC·Filed 1996·Granted Oct 27, 1998·64 cites·20 claims
- 1082US6082332AHydraulically-actuated fuel injector with direct control needle valveCATERPILLAR INC·Filed 1998·Granted Jul 4, 2000·42 cites·22 claims
- 1179US8689772B2Fuel injector with telescoping armature overtravel featureHEFLER GREGORY WILLIAM·Filed 2011·Granted Apr 8, 2014·6 cites·20 claims
- 1278US5833146AValve assembly with coupled seats and fuel injector using sameCATERPILLAR INC·Filed 1996·Granted Nov 10, 1998·33 cites·20 claims
- 1376US8690075B2Fuel injector with needle control system that includes F, A, Z and E orificesMAHMOOD SANA·Filed 2011·Granted Apr 8, 2014·6 cites·20 claims
- 1476US5159811AFlexible coupling device for use in an engine manifold systemCATERPILLAR INC·Filed 1990·Granted Nov 3, 1992·47 cites·19 claims
- 1574US7509948B1Variable displacement pump with an anti-stiction deviceCATERPILLAR INC·Filed 2007·Granted Mar 31, 2009·9 cites·8 claims
- 1672US6425375B1Piston and barrel assembly with stepped top and hydraulically-actuated fuel injector utilizing sameCATERPILLAR INC·Filed 2000·Granted Jul 30, 2002·15 cites·12 claims
- 1763US6065450AHydraulically-actuated fuel injector with direct control needle valveCATERPILLAR INC·Filed 1998·Granted May 23, 2000·16 cites·20 claims
- 1862US7950373B2Check valve with separate spherical spring guideCATERPILLAR INC·Filed 2008·Granted May 31, 2011·3 cites·20 claims
- 1960US6749129B2Directly controlled fuel injector with sealing against fluid mixingCATERPILLAR INC·Filed 2002·Granted Jun 15, 2004·8 cites·19 claims
- 2059US6142394AValve seat for a ball and pin valve member in a hydraulically actuated fuel injectorCATERPILLAR INC·Filed 1999·Granted Nov 7, 2000·18 cites·22 claims
- 2151US5520155ATappet and plunger assembly adapted for a fluid injection pumpCATERPILLAR INC·Filed 1994·Granted May 28, 1996·12 cites·15 claims
- 2249US6575137B2Piston and barrel assembly with stepped top and hydraulically-actuated fuel injector utilizing sameCATERPILLAR INC·Filed 2002·Granted Jun 10, 2003·4 cites·1 claims
- 2346US6802285B2Engine having a variable valve actuation systemCATERPILLAR INC·Filed 2002·Granted Oct 12, 2004·3 cites·8 claims
- 2444US6742728B2Electrical actuator subassembly with external threads and fuel injector using sameCATERPILLAR INC·Filed 2001·Granted Jun 1, 2004·2 cites·10 claims
- 2541US7470117B2Variable discharge fuel pumpCATERPILLAR INC·Filed 2004·Granted Dec 30, 2008·2 cites·20 claims
- 2641US6050496ARotational actuation fluid control valve for a hydraulically actuated fuel injectorCATERPILLAR INC·Filed 1998·Granted Apr 18, 2000·8 cites·16 claims
- 2740US2012103308A1Two-Way Valve Orifice Plate for a Fuel InjectorHEFLER GREGORY W·Filed 2010·Application pending·0 cites
- 2838US5983864AJumper tube with improved misalignment capabilityCATERPILLAR INC·Filed 1997·Granted Nov 16, 1999·7 cites·4 claims
- 2930US2001017324A1Two piece guided nozzle assembly for a fuel injectorFiled 1999·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →