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David P. Smith

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  • Joliet, IL, US
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Patents Grantslast 30 patents

Patents Applicationslast 30 patents

  • Information Patent Application

    Piezo-electric actuated valve
    • Publication number 20090032746
    • Publication date Feb 5, 2009
    • Caterpillar Inc.
    • David Paul Smith
    • F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL
  • Information Patent Application

    Electromechanical actuator
    • Publication number 20080238246
    • Publication date Oct 2, 2008
    • Caterpillar Inc.
    • David P. Smith
    • F03 - MACHINES OR ENGINES FOR LIQUIDS WIND, SPRING WEIGHT AND MISCELLANEOUS M...
  • Information Patent Application

    Hydraulic motor
    • Publication number 20080155976
    • Publication date Jul 3, 2008
    • Caterpillar Inc.
    • David P. Smith
    • F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL
  • Information Patent Application

    Sprag and bearing system
    • Publication number 20080156596
    • Publication date Jul 3, 2008
    • Caterpillar Inc.
    • David P. Smith
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Application

    Fluid motor
    • Publication number 20080098882
    • Publication date May 1, 2008
    • Caterpillar Inc.
    • David P. Smith
    • F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL
  • Information Patent Application

    Fluidly actuated sprag
    • Publication number 20080099304
    • Publication date May 1, 2008
    • Caterpillar Inc.
    • David P. Smith
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Application

    Hydraulic regeneration system
    • Publication number 20070186548
    • Publication date Aug 16, 2007
    • Caterpillar Inc. and Shin Caterpillar Mitsubishi Ltd.
    • David P. Smith
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Application

    Hydraulic system having in-sump energy recovery device
    • Publication number 20070175209
    • Publication date Aug 2, 2007
    • Caterpillar Inc.
    • David P. Smith
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Application

    Rotary machine
    • Publication number 20070076998
    • Publication date Apr 5, 2007
    • Caterpillar Inc.
    • James Elmer Winzeler
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Application

    Metering valve with integral relief and makeup function
    • Publication number 20070044649
    • Publication date Mar 1, 2007
    • Caterpillar Inc. and Shin Caterpillar Mitsubishi Ltd.
    • David P. Smith
    • G05 - CONTROLLING REGULATING
  • Information Patent Application

    Electro-hydraulic metering valve with integral flow control
    • Publication number 20070022871
    • Publication date Feb 1, 2007
    • Shin Caterpillar Mitsubishi Ltd, and
    • David P. Smith
    • G05 - CONTROLLING REGULATING
  • Information Patent Application

    Poppet valve arrangements
    • Publication number 20060005885
    • Publication date Jan 12, 2006
    • James A. Aardema
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Application

    Electro-hydraulic valve and system
    • Publication number 20040094218
    • Publication date May 20, 2004
    • David P. Smith
    • G05 - CONTROLLING REGULATING
  • Information Patent Application

    Hydraulic regeneration system
    • Publication number 20030213238
    • Publication date Nov 20, 2003
    • Caterpillar Inc.
    • David P. Smith
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Application

    FLUID SYSTEM FOR TWO HYDRAULIC CIRCUITS HAVING A COMMON SOURCE OF P...
    • Publication number 20030182938
    • Publication date Oct 2, 2003
    • David P. Smith
    • F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
  • Information Patent Application

    Variable pressure relief valve
    • Publication number 20030183282
    • Publication date Oct 2, 2003
    • David P. Smith
    • G05 - CONTROLLING REGULATING
  • Information Patent Application

    System and method for starting an engine
    • Publication number 20030121265
    • Publication date Jul 3, 2003
    • Caterpillar Inc.
    • Thomas J. Hajek
    • F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • Information Patent Application

    Hydraulic quick drop circuit
    • Publication number 20030121410
    • Publication date Jul 3, 2003
    • David P. Smith
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Application

    Electro-hydraulic pump control system
    • Publication number 20030106314
    • Publication date Jun 12, 2003
    • Caterpillar, Inc.
    • David P. Smith
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Application

    Fluid system having variable pressure relief
    • Publication number 20030106315
    • Publication date Jun 12, 2003
    • David P. Smith
    • F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL
  • Information Patent Application

    Hydro-mechanical combiner
    • Publication number 20030106764
    • Publication date Jun 12, 2003
    • David P. Smith
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Application

    COMPACT PUMP OR MOTOR WITH INTERNAL SWASH PLATE
    • Publication number 20030099551
    • Publication date May 29, 2003
    • Thomas J. Hajek
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Application

    System for definable single lever control shift pattern joint
    • Publication number 20020066329
    • Publication date Jun 6, 2002
    • Chad T. Brickner
    • G05 - CONTROLLING REGULATING