Patents by Inventor Douglas Lee Arkfeld

Douglas Lee Arkfeld has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • In-line fuel conditioner
    Publication number: 20030010326
    Abstract: A fuel conditioner adapted to be placed in-line in a fuel delivery system of an internal combustion engine system. The fuel conditioner include a metallic housing containing a plurality of reactive anti-biological elements. The fuel conditioner also includes a high Gauss magnet. The fuel passes over the anti-biological elements and adjacent the magnet such that growth of biological agents entrained within the fuels is inhibited. The fuel also passes adjacent the magnet such that ferrous particles entrained within the fuel are retained with the fuel conditioner and removed from the fuel flow.
    Type: Application
    Filed: July 9, 2002
    Publication date: January 16, 2003
    Inventor: Douglas Lee Arkfeld
  • In-line fuel conditioner
    Patent number: 6450155
    Abstract: A fuel conditioner adapted to be placed in-line in a fuel delivery system of an internal combustion engine system. The fuel conditioner include a metallic housing containing a plurality of reactive anti-biological elements. The fuel conditioner also includes a high Gauss magnet. The fuel passes over the anti-biological elements and adjacent the magnet such that growth of biological agents entrained within the fuels is inhibited. The fuel also passes adjacent the magnet such that ferrous particles entrained within the fuel are retained with the fuel conditioner and removed from the fuel flow.
    Type: Grant
    Filed: July 12, 2001
    Date of Patent: September 17, 2002
    Inventor: Douglas Lee Arkfeld
  • In-line catalyst
    Patent number: 5881702
    Abstract: An apparatus for treating fuel for increasing fuel combustion efficiency in an internal combustion engine including a fuel source and a fuel line includes a fuel line supply segment carrying liquid fuel; a fuel line receiving segment in fluid communication with the internal combustion engine; a fuel containment housing having an inlet port and an outlet port; structure for sealingly connecting the housing inlet port to the fuel line supply segment; structure for sealingly connecting the housing outlet port to the fuel line receiving segment; several metal wire strands contained within the housing; and structure for retaining the wire strands within the housing. A method for treating fuel for increasing fuel combustion efficiency in an internal combustion engine including a fuel supply system includes the step of passing the fuel over treating elements within the fuel supply system made up of several different metals.
    Type: Grant
    Filed: February 12, 1998
    Date of Patent: March 16, 1999
    Inventor: Douglas Lee Arkfeld