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Benjamin R. Du

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  • Newport Coast, CA, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Double acting fluid pump with spring biased piston
    • Patent number 9,726,160
    • Issue date Aug 8, 2017
    • PROVIDENCE ENTERPRISE LIMITED
    • Benjamin R. Du
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Bag in box beverage pump
    • Patent number 9,316,214
    • Issue date Apr 19, 2016
    • Benjamin R. Du
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Bag in box beverage pump
    • Patent number 9,249,792
    • Issue date Feb 2, 2016
    • Benjamin R. Du
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Double acting fluid pump
    • Patent number 8,550,794
    • Issue date Oct 8, 2013
    • Foothill Land, LLC
    • Benjamin R. Du
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Multiple layer pump diaphragm
    • Patent number 6,343,539
    • Issue date Feb 5, 2002
    • Benjamin R. Du
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Plastic gear pump housing
    • Patent number 6,325,604
    • Issue date Dec 4, 2001
    • Benjamin R. Du
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Pump controller
    • Patent number 6,099,264
    • Issue date Aug 8, 2000
    • ITT Manufacturing Enterprises, Inc.
    • Benjamin R. Du
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Beer keg and pre-mixed beverage tank change-over device
    • Patent number 6,062,427
    • Issue date May 16, 2000
    • Du Investments L.L.C.
    • Benjamin R. Du
    • B67 - OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS LIQUID...
  • Information Patent Grant

    Slide valve of a gas driven pump
    • Patent number 5,833,439
    • Issue date Nov 10, 1998
    • Benjamin R. Du
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Positive displacement pump including modular pump component
    • Patent number 5,749,709
    • Issue date May 12, 1998
    • Benjamin R. Du
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Gas driven pump
    • Patent number 5,664,940
    • Issue date Sep 9, 1997
    • Flojet Corporation
    • Benjamin R. Du
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Positive displacement pump including modular pump component
    • Patent number 5,613,834
    • Issue date Mar 25, 1997
    • Benjamin R. Du
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Positive displacement pump including modular pump component
    • Patent number 5,540,556
    • Issue date Jul 30, 1996
    • Benjamin R. Du
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Condiment dispensing device
    • Patent number 5,435,466
    • Issue date Jul 25, 1995
    • Benjamin R. Du
    • B67 - OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS LIQUID...
  • Information Patent Grant

    Condiment dispensing device
    • Patent number 5,361,943
    • Issue date Nov 8, 1994
    • Benjamin R. Du
    • B67 - OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS LIQUID...
  • Information Patent Grant

    Condiment dispensing device
    • Patent number 5,350,083
    • Issue date Sep 27, 1994
    • Benjamin R. Du
    • B67 - OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS LIQUID...
  • Information Patent Grant

    Condiment dispensing device
    • Patent number 5,230,443
    • Issue date Jul 27, 1993
    • Benjamin R. Du
    • B67 - OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS LIQUID...
  • Information Patent Grant

    Method and apparatus for facilitating the cleaning of a spray apert...
    • Patent number 5,188,255
    • Issue date Feb 23, 1993
    • Benjamin R. Du
    • B67 - OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS LIQUID...
  • Information Patent Grant

    Proportioning pump
    • Patent number 5,170,912
    • Issue date Dec 15, 1992
    • Benjamin R. Du
    • B67 - OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS LIQUID...
  • Information Patent Grant

    Condiment dispensing device
    • Patent number 5,158,210
    • Issue date Oct 27, 1992
    • Benjamin R. Du
    • B67 - OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS LIQUID...
  • Information Patent Grant

    Fluid pump
    • Patent number 5,083,906
    • Issue date Jan 28, 1992
    • Benjamin R. Du
    • F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
  • Information Patent Grant

    Vending machine last drink sensor and dispensing apparatus
    • Patent number 4,957,220
    • Issue date Sep 18, 1990
    • Benjamin R. Du
    • B67 - OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS LIQUID...
  • Information Patent Grant

    Air driven pump
    • Patent number 4,540,349
    • Issue date Sep 10, 1985
    • Benjamin R. Du
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Apparatus and method for dispensing beverage syrup
    • Patent number 4,467,941
    • Issue date Aug 28, 1984
    • Benjamin R. Du
    • B67 - OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS LIQUID...

Patents Applicationslast 30 patents

  • Information Patent Application

    FOUNTAIN PUMP BRACKET
    • Publication number 20180335030
    • Publication date Nov 22, 2018
    • Foothill Land, LLC
    • Benjamin R. Du
    • B67 - OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS LIQUID...
  • Information Patent Application

    BAG IN BOX BEVERAGE PUMP
    • Publication number 20140072455
    • Publication date Mar 13, 2014
    • Benjamin R. Du
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Application

    DOUBLE ACTING FLUID PUMP
    • Publication number 20130343934
    • Publication date Dec 26, 2013
    • FOOTHILL LAND, LLC.
    • BENJAMIN R. DU
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Application

    BAG IN BOX BEVERAGE PUMP
    • Publication number 20130259708
    • Publication date Oct 3, 2013
    • Benjamin R. Du
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Application

    Double Acting Fluid Pump
    • Publication number 20120034119
    • Publication date Feb 9, 2012
    • Benjamin R. Du
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...