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Joseph Ralph Littlefield

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  • Waterford, MI, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Electric drive unit clutch
    • Patent number 11,383,593
    • Issue date Jul 12, 2022
    • GM Global Technology Operations LLC
    • Alan G. Holmes
    • B60 - VEHICLES IN GENERAL
  • Information Patent Grant

    Multi-axis final drive assembly
    • Patent number 11,035,448
    • Issue date Jun 15, 2021
    • GM Global Technology Operations LLC
    • Joseph R. Littlefield
    • B60 - VEHICLES IN GENERAL
  • Information Patent Grant

    Planetary differential drive system
    • Patent number 10,982,745
    • Issue date Apr 20, 2021
    • GM Global Technology Operations LLC
    • Alan G. Holmes
    • B60 - VEHICLES IN GENERAL
  • Information Patent Grant

    Motor vehicle powertrain
    • Patent number 10,697,524
    • Issue date Jun 30, 2020
    • GM Global Technology Operations LLC
    • Joseph R. Littlefield
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Multi-axis final drive assembly
    • Patent number 10,557,536
    • Issue date Feb 11, 2020
    • GM Global Technology Operations LLC
    • Joseph R. Littlefield
    • B60 - VEHICLES IN GENERAL
  • Information Patent Grant

    Two ratio electric drive unit
    • Patent number 10,533,640
    • Issue date Jan 14, 2020
    • GM Global Technology Operations LLC
    • Joseph R. Littlefield
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Motor vehicle powertrain
    • Patent number 10,500,938
    • Issue date Dec 10, 2019
    • GM Global Technology Operations LLC
    • Joseph R. Littlefield
    • B60 - VEHICLES IN GENERAL
  • Information Patent Grant

    Powertrain including modular drive unit
    • Patent number 10,377,221
    • Issue date Aug 13, 2019
    • GM Global Technology Operations LLC
    • Alan G. Holmes
    • B60 - VEHICLES IN GENERAL
  • Information Patent Grant

    Electric vehicle drive using combined differential and reduction ge...
    • Patent number 10,300,905
    • Issue date May 28, 2019
    • GM Global Technology Operations LLC
    • Alan G. Holmes
    • B60 - VEHICLES IN GENERAL
  • Information Patent Grant

    Dog clutch for a vehicle transmission
    • Patent number 10,247,252
    • Issue date Apr 2, 2019
    • Joseph R Littlefield
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Planetary gear set bearing retainer
    • Patent number 10,234,019
    • Issue date Mar 19, 2019
    • GM Global Technology Operations LLC
    • Joseph R. Littlefield
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Synchronizer for radially applied dog clutch for a vehicle
    • Patent number 10,190,643
    • Issue date Jan 29, 2019
    • Joseph R Littlefield
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Clutch assembly having a hydraulically actuate piston and latching...
    • Patent number 10,167,906
    • Issue date Jan 1, 2019
    • GM Global Technology Operations LLC
    • Vijay A. Neelakantan
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Radially applied dog clutch with bi-directional ratcheting for a ve...
    • Patent number 10,138,947
    • Issue date Nov 27, 2018
    • Joseph R Littlefield
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Power-split hybrid powertrain
    • Patent number 10,124,661
    • Issue date Nov 13, 2018
    • GM Global Technology Operations LLC
    • Joseph R. Littlefield
    • B60 - VEHICLES IN GENERAL
  • Information Patent Grant

    Ball cam actuated dog clutch
    • Patent number 10,094,427
    • Issue date Oct 9, 2018
    • GM Global Technology Operations LLC
    • Joseph Ralph Littlefield
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Multi-axis final drive assembly
    • Patent number 10,036,458
    • Issue date Jul 31, 2018
    • GM Global Technology Operations LLC
    • Joseph R. Littlefield
    • B60 - VEHICLES IN GENERAL
  • Information Patent Grant

    Powertrain with multi-planetary, single motor drive unit
    • Patent number 9,950,607
    • Issue date Apr 24, 2018
    • GM Global Technology Operations LLC
    • Joseph Ralph Littlefield
    • B60 - VEHICLES IN GENERAL
  • Information Patent Grant

    Compound-power-split electrically variable transmissions with motor...
    • Patent number 9,840,140
    • Issue date Dec 12, 2017
    • GM Global Technology Operations LLC
    • Alan G. Holmes
    • B60 - VEHICLES IN GENERAL
  • Information Patent Grant

    Pawl grounding clutch with synchronizer
    • Patent number 9,574,619
    • Issue date Feb 21, 2017
    • GM Global Technology Operations, LLC
    • Joseph Ralph Littlefield
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Vehicle
    • Patent number 8,813,896
    • Issue date Aug 26, 2014
    • GM Global Technology Operations LLC
    • Joseph Ralph Littlefield
    • B60 - VEHICLES IN GENERAL

Patents Applicationslast 30 patents

  • Information Patent Application

    ELECTRIC DRIVE UNIT CLUTCH
    • Publication number 20220136594
    • Publication date May 5, 2022
    • GM GLOBAL TECHNOLOGY OPERATIONS LLC
    • Alan G. Holmes
    • B60 - VEHICLES IN GENERAL
  • Information Patent Application

    PLANETARY DIFFERENTIAL DRIVE SYSTEM
    • Publication number 20200224754
    • Publication date Jul 16, 2020
    • GM GLOBAL TECHNOLOGY OPERATIONS LLC
    • Alan G. Holmes
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Application

    MULTI-AXIS FINAL DRIVE ASSEMBLY
    • Publication number 20200173529
    • Publication date Jun 4, 2020
    • GM GLOBAL TECHNOLOGY OPERATIONS LLC
    • Joseph R. Littlefield
    • B60 - VEHICLES IN GENERAL
  • Information Patent Application

    ELECTRIC MOTOR TRANSAXLE WITH SIDE-TO-SIDE TORQUE CONTROL
    • Publication number 20200062114
    • Publication date Feb 27, 2020
    • GM GLOBAL TECHNOLOGY OPERATIONS LLC
    • Alan G. Holmes
    • B60 - VEHICLES IN GENERAL
  • Information Patent Application

    MOTOR VEHICLE POWERTRAIN
    • Publication number 20190143801
    • Publication date May 16, 2019
    • GM GLOBAL TECHNOLOGY OPERATIONS LLC
    • Joseph R. Littlefield
    • B60 - VEHICLES IN GENERAL
  • Information Patent Application

    MOTOR VEHICLE POWERTRAIN
    • Publication number 20190145500
    • Publication date May 16, 2019
    • GM GLOBAL TECHNOLOGY OPERATIONS LLC
    • Joseph R. Littlefield
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Application

    TWO RATIO ELECTRIC DRIVE UNIT
    • Publication number 20190011018
    • Publication date Jan 10, 2019
    • GM GLOBAL TECHNOLOGY OPERATIONS LLC
    • Joseph R. LITTLEFIELD
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Application

    ELECTRIC VEHICLE DRIVE USING COMBINED DIFFERENTIAL AND REDUCTION GE...
    • Publication number 20180345949
    • Publication date Dec 6, 2018
    • GM GLOBAL TECHNOLOGY OPERATIONS LLC
    • Alan G. HOLMES
    • B60 - VEHICLES IN GENERAL
  • Information Patent Application

    POWER-SPLIT HYBRID POWERTRAIN
    • Publication number 20180304736
    • Publication date Oct 25, 2018
    • GM GLOBAL TECHNOLOGY OPERATIONS LLC
    • Joseph R. Littlefield
    • B60 - VEHICLES IN GENERAL
  • Information Patent Application

    MULTI-AXIS FINAL DRIVE ASSEMBLY
    • Publication number 20180299000
    • Publication date Oct 18, 2018
    • GM GLOBAL TECHNOLOGY OPERATIONS LLC
    • Joseph R. Littlefield
    • B60 - VEHICLES IN GENERAL
  • Information Patent Application

    RADIALLY APPLIED DOG CLUTCH WITH BI-DIRECTIONAL RATCHETING FOR A VE...
    • Publication number 20180231064
    • Publication date Aug 16, 2018
    • GM GLOBAL TECHNOLOGY OPERATIONS LLC
    • Joseph R Littlefield
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Application

    DOG CLUTCH FOR A VEHICLE TRANSMISSION
    • Publication number 20180231063
    • Publication date Aug 16, 2018
    • GM GLOBAL TECHNOLOGY OPERATIONS LLC
    • Joseph R Littlefield
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Application

    SYNCHRONIZER FOR RADIALLY APPLIED DOG CLUTCH FOR A VEHICLE
    • Publication number 20180231068
    • Publication date Aug 16, 2018
    • GM GLOBAL TECHNOLOGY OPERATIONS LLC
    • Joseph R Littlefield
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Application

    PARK CONTROL SYSTEM FOR A VEHICLE TRANSMISSION
    • Publication number 20180112774
    • Publication date Apr 26, 2018
    • GM GLOBAL TECHNOLOGY OPERATIONS LLC
    • Joseph R. Littlefield
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Application

    MULTI-AXIS FINAL DRIVE ASSEMBLY
    • Publication number 20180112755
    • Publication date Apr 26, 2018
    • GM GLOBAL TECHNOLOGY OPERATIONS LLC
    • Joseph R. Littlefield
    • B60 - VEHICLES IN GENERAL
  • Information Patent Application

    CLUTCH ASSEMBLY HAVING A HYDRAULICALLY ACTUATE PISTON AND LATCHING...
    • Publication number 20180023635
    • Publication date Jan 25, 2018
    • GM GLOBAL TECHNOLOGY OPERATIONS LLC
    • Vijay A. Neelakantan
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Application

    PLANETARY GEAR SET BEARING RETAINER
    • Publication number 20170261095
    • Publication date Sep 14, 2017
    • GM GLOBAL TECHNOLOGY OPERATIONS LLC
    • Joseph R. Littlefield
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Application

    POWERTRAIN WITH MULTI-PLANETARY, SINGLE MOTOR DRIVE UNIT
    • Publication number 20170136870
    • Publication date May 18, 2017
    • GM GLOBAL TECHNOLOGY OPERATIONS LLC
    • Joseph Ralph Littlefield
    • B60 - VEHICLES IN GENERAL
  • Information Patent Application

    POWERTRAIN INCLUDING MODULAR DRIVE UNIT
    • Publication number 20170136867
    • Publication date May 18, 2017
    • GM GLOBAL TECHNOLOGY OPERATIONS LLC
    • Alan G. Holmes
    • B60 - VEHICLES IN GENERAL
  • Information Patent Application

    BALL CAM ACTUATED DOG CLUTCH
    • Publication number 20170108052
    • Publication date Apr 20, 2017
    • GM GLOBAL TECHNOLOGY OPERATIONS LLC
    • Joseph Ralph Littlefield
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Application

    VEHICLE
    • Publication number 20140202280
    • Publication date Jul 24, 2014
    • GM GLOBAL TECHNOLOGY OPERATIONS LLC
    • Joseph Ralph Littlefield
    • B60 - VEHICLES IN GENERAL