Patents Assigned to DEN HARTOG INDUSTRIES
  • MOLDED TANK WITH CAST-IN FITTING SEAT
    Publication number: 20090266821
    Abstract: A plastic tank is rotationally molded with a cast-in steps seat for a leak-proof drainage fitting. The seat is formed during the molding process using a mandrel mounted on the mold wall. The seat provides substantially parallel surfaces to the outer wall surface of the tank so as to assure proper sealing of the fitting installed in the drain opening of the tank.
    Type: Application
    Filed: April 23, 2008
    Publication date: October 29, 2009
    Applicant: DEN HARTOG INDUSTRIES
    Inventors: DEAN JOHNSON, EUGENE VANDER GRIEND