Patents by Inventor Bert R. Frikken

Bert R. Frikken 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).

  • Graphite-epoxy molding method
    Patent number: 4202856
    Abstract: A novel method is disclosed for the manufacture of a hollow graphite-epoxy structural part with high composite density and using tooling that eliminates the necessity of autoclave and similar high external pressure curing equipment. The method of manufacture in part involves the use of a rigid hollow frangible mandrel and superimposed flexible pressure bag element which subsequently develops high internal pressures in the part being processed during composite curing stages.
    Type: Grant
    Filed: September 30, 1977
    Date of Patent: May 13, 1980
    Assignee: Rockwell International Corporation
    Inventors: Bert R. Frikken, Ronald G. Halcomb