Inventor · disambiguated record
Julius P. Perr
Also filed as: MUNTEAN GEORGE L · PERR JULIUS · PERR JULIUS P
51 granted patents·1,852 citations·filing 1973–2003
99Inventor score
Top patents by PatentIndex Score
51 records- 0198US5329908ACompressed natural gas injection system for gaseous fueled enginesCUMMINS ENGINE CO INC·Filed 1993·Granted Jul 19, 1994·112 cites·27 claims
- 0298US5002022AValve control system with a variable timing hydraulic linkCUMMINS ENGINE CO INC·Filed 1989·Granted Mar 26, 1991·83 cites·14 claims
- 0397US6336598B1Gaseous and liquid fuel injector with a two way hydraulic fluid control valveWESTPORT RES INC·Filed 2000·Granted Jan 8, 2002·92 cites·29 claims
- 0497US5899389ATwo stage fuel injector nozzle assemblyCUMMINS ENGINE CO INC·Filed 1997·Granted May 4, 1999·153 cites·12 claims
- 0596US5404855AVariable displacement high pressure pump for fuel injection systemsCUMMINS ENGINE CO INC·Filed 1994·Granted Apr 11, 1995·120 cites·22 claims
- 0695US5983863ACompact high performance fuel system with accumulatorCUMMINS ENGINE CO INC·Filed 1994·Granted Nov 16, 1999·109 cites·192 claims
- 0794US6557779B2Variable spray hole fuel injector with dual actuatorsCUMMINS ENGINE CO INC·Filed 2001·Granted May 6, 2003·53 cites·20 claims
- 0894US5979803AFuel injector with pressure balanced needle valveCUMMINS ENGINE CO INC·Filed 1997·Granted Nov 9, 1999·80 cites·10 claims
- 0994US4249499ATiming mechanism for a fuel supply systemCUMMINS ENGINE CO INC·Filed 1980·Granted Feb 10, 1981·44 cites·19 claims
- 1091US5419492AForce balanced electronically controlled fuel injectorCUMMINS ENGINE CO INC·Filed 1994·Granted May 30, 1995·67 cites·24 claims
- 1191US4909197ACam follower assembly with pinless rollerCUMMINS ENGINE CO INC·Filed 1989·Granted Mar 20, 1990·42 cites·13 claims
- 1290US5441027AIndividual timing and injection fuel metering systemCUMMINS ENGINE CO INC·Filed 1994·Granted Aug 15, 1995·71 cites·36 claims
- 1390US3951117AFuel supply system for an internal combustion engineCUMMINS ENGINE CO INC·Filed 1974·Granted Apr 20, 1976·40 cites·31 claims
- 1489US4062332ACompression brake for internal combustion engineCUMMINS ENGINE CO INC·Filed 1975·Granted Dec 13, 1977·32 cites·8 claims
- 1588US4911127AFuel injector for an internal combustion engineCUMMINS ENGINE CO INC·Filed 1989·Granted Mar 27, 1990·40 cites·10 claims
- 1687US4463901AUnit fuel injector having independently controlled timing and meteringCUMMINS ENGINE CO INC·Filed 1982·Granted Aug 7, 1984·29 cites·14 claims
- 1782US4471909AMiniaturized unit fuel injectorCUMMINS ENGINE CO INC·Filed 1981·Granted Sep 18, 1984·23 cites·8 claims
- 1881US4721247AHigh pressure unit fuel injectorCUMMINS ENGINE CO INC·Filed 1986·Granted Jan 26, 1988·29 cites·21 claims
- 1981US4206734AAdjustable timing mechanism for fuel injection systemCUMMINS ENGINE CO INC·Filed 1977·Granted Jun 10, 1980·21 cites·9 claims
- 2080US5619969AFuel injection rate shaping control systemCUMMINS ENGINE CO INC·Filed 1995·Granted Apr 15, 1997·45 cites·20 claims
- 2180US4176641AAneroid for a turbocharged engineCUMMINS ENGINE CO INC·Filed 1976·Granted Dec 4, 1979·22 cites·20 claims
- 2279US4934344AModified four stroke cycle and mechanismCUMMINS ENGINE CO INC·Filed 1989·Granted Jun 19, 1990·29 cites·19 claims
- 2379US4134549AInjectors of a fuel supply system for an internal combustion engineCUMMINS ENGINE CO INC·Filed 1976·Granted Jan 16, 1979·15 cites·5 claims
- 2476US5765755AInjection rate shaping nozzle assembly for a fuel injectorCUMMINS ENGINE CO INC·Filed 1997·Granted Jun 16, 1998·36 cites·39 claims
- 2576US5042445AElectronic controlled fuel supply system for high pressure injectorCUMMINS ENGINE CO INC·Filed 1990·Granted Aug 27, 1991·50 cites·13 claims
- 2676US5033442AFuel injector with multiple variable timingCUMMINS ENGINE CO INC·Filed 1989·Granted Jul 23, 1991·32 cites·21 claims
- 2776US4093046AExhaust braking apparatusCUMMINS ENGINE CO INC·Filed 1976·Granted Jun 6, 1978·20 cites·6 claims
- 2873US4986472AHigh pressure unit fuel injector with timing chamber pressure controlCUMMINS ENGINE CO INC·Filed 1989·Granted Jan 22, 1991·25 cites·27 claims
- 2971US5518030AThree-way flow valve with variable drain orifice areaCUMMINS ENGINE CO INC·Filed 1994·Granted May 21, 1996·21 cites·4 claims
- 3071US5301875AForce balanced electronically controlled fuel injectorCUMMINS ENGINE CO INC·Filed 1992·Granted Apr 12, 1994·27 cites·36 claims
- 3169US6964270B2Dual mode EGR valveCUMMINS INC·Filed 2003·Granted Nov 15, 2005·13 cites·44 claims
- 3269US5029568AInjection rate control injectorCUMMINS ENGINE CO INC·Filed 1990·Granted Jul 9, 1991·25 cites·23 claims
- 3367US5445323AHigh pressure fuel injector including a trapped volume spill portCUMMINS ENGINE CO INC·Filed 1994·Granted Aug 29, 1995·26 cites·16 claims
- 3467US5094397AUnit fuel injector with injection chamber spill valveCUMMINS ENGINE CO INC·Filed 1991·Granted Mar 10, 1992·22 cites·16 claims
- 3567US4971016AElectronic controlled fuel supply system for high pressure injectorCUMMINS ENGINE CO INC·Filed 1988·Granted Nov 20, 1990·23 cites·13 claims
- 3665US5076236AFuel cutoff for better transient controlCUMMINS ENGINE CO INC·Filed 1990·Granted Dec 31, 1991·22 cites·14 claims
- 3765US4410137AMiniaturized unit fuel injector employing hydraulically controlled timingCUMMINS ENGINE CO INC·Filed 1981·Granted Oct 18, 1983·12 cites·20 claims
- 3861US4962743AInjection rate control camCUMMINS ENGINE CO INC·Filed 1989·Granted Oct 16, 1990·15 cites·23 claims
- 3960US5353766ADistributor for a high pressure fuel systemCUMMINS ENGINE CO INC·Filed 1993·Granted Oct 11, 1994·21 cites·17 claims
- 4059US5611317AOpen nozzle fuel injector having drive train wear compensationCUMMINS ENGINE CO INC·Filed 1995·Granted Mar 18, 1997·18 cites·20 claims
- 4155US3965875AFuel injection system for diesel enginesCUMMINS ENGINE CO INC·Filed 1973·Granted Jun 29, 1976·11 cites·11 claims
- 4252US4944275AFuel injector train with variable injection rateCUMMINS ENGINE CO INC·Filed 1989·Granted Jul 31, 1990·10 cites·19 claims
- 4348US5076240AArticulated open nozzle high pressure unit fuel injectorCUMMINS ENGINE CO INC·Filed 1990·Granted Dec 31, 1991·11 cites·27 claims
- 4445US5713335AVariable injection timing and injection pressure control arrangementCUMMINS ENGINE CO INC·Filed 1996·Granted Feb 3, 1998·12 cites·18 claims
- 4545US4909219AHydromechanical fuel pump systemCUMMINS ENGINE CO INC·Filed 1989·Granted Mar 20, 1990·7 cites·29 claims
- 4645US4207035ATurbocharger assemblyCUMMINS ENGINE CO INC·Filed 1977·Granted Jun 10, 1980·13 cites·5 claims
- 4743US4149506AFuel injectorCUMMINS ENGINE CO INC·Filed 1975·Granted Apr 17, 1979·7 cites·23 claims
- 4842US4395979APressure limiting hydraulic tappetCUMMINS ENGINE CO INC·Filed 1980·Granted Aug 2, 1983·7 cites·20 claims
- 4937US5954029AUnit fuel injector having constant start of injectionCUMMINS ENGINE CO INC·Filed 1995·Granted Sep 21, 1999·7 cites·24 claims
- 5036US4038956AFluid pressure regulatorCUMMINS ENGINE CO INC·Filed 1974·Granted Aug 2, 1977·4 cites·15 claims
Showing the top 50 of 51 patent records by PatentIndex Score.
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