Patents by Inventor Harold P. Hogarth

Harold P. Hogarth 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).

  • Patent number: 5597630
    Abstract: An elongated, tapered seamless and hollow tubular member of net shape is disclosed. The tubular member is made by a method comprising providing an elongated, tapered mandrel, applying a composite material consisting of reinforced fibers with a resin on the mandrel, providing a shell having an elongated, tapered bore, inserting the mandrel with the composite material applied thereon into the bore of the shell to provide a mold assembly, heating the mold assembly, displacing the mandrel and shell longitudinally toward each other to compress the composite material of the article being formed by simultaneously applying a tensile force at one end of the mandrel and a compressive force at the other, allowing the mold assembly to cool, and then separating the shell and mandrel from the molded article.
    Type: Grant
    Filed: February 8, 1995
    Date of Patent: January 28, 1997
    Inventors: Harold P. Hogarth, Wayne E. Hogarth
  • Patent number: 5484498
    Abstract: A method of molding an elongated, tapered seamless and hollow member or tubular of net shape comprising providing an elongated, tapered mandrel, applying a composite material consisting of reinforced fibers with a resin on the mandrel, providing a shell having an elongated, tapered bore, inserting the mandrel with the composite material applied thereon into the bore of the shell to provide a mold assembly, heating the mold assembly, displacing the mandrel and shell longitudinally toward each other to compress the composite material of the article being formed by simultaneously applying a tensile force at one end of the mandrel and a compressive force at the other, allowing the mold assembly to cool, and then separating the shell and mandrel from the molded article.
    Type: Grant
    Filed: November 18, 1992
    Date of Patent: January 16, 1996
    Inventors: Harold P. Hogarth, Wayne E. Hogarth
  • Patent number: 3974012
    Abstract: An apparatus and method of using same to form tubular tapered shafts particularly adapted for golf clubs, ski poles, fishing rods and the like. The material used in forming the shafts is a thermo-setting resin sheet that has a number of elongate, laterally spaced, parallel fibers of graphite carbon, boron or like material therein, which fibers have a tensile strength comparable to steel, but are only a fraction of the weight of the latter. The apparatus and method of using the same is characterized by the tubular shaft being formed with exterior and interior cylindrical wall surfaces that are truly concentric, and with the fibers embedded in the polymerized resin being pre-tensioned and spaced from one another.
    Type: Grant
    Filed: December 5, 1973
    Date of Patent: August 10, 1976
    Inventor: Harold P. Hogarth