Patents by Inventor Peter J. Creegan

Peter J. Creegan 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: 6067480
    Abstract: An apparatus for thermal extrusion of a polymeric material to manufacture prototype mechanical elements from said polymeric material, said apparatus used for deposition of a liquefied ribbon of said polymeric material in patterned layers which solidify to form a three-dimensional prototype element, said apparatus comprising in combination, a mounting frame, said mounting frame including a mounting plate with a movable platen movable in the x and y directions, said frame further including an extrusion cylinder, said extrusion cylinder comprising a cylindrical housing having a uniform diameter cylindrical through passage, a head member having a uniform diameter bore connected with a reduced diameter, integral tip opening, said head member attached by a clamp to one end of the cylindrical housing to align the bore with the through passage, said-bore and through passage having an equal diameter, said head member including a circumferential heater to liquefy contents of the head member, a reciprocal piston slidabl
    Type: Grant
    Filed: April 2, 1997
    Date of Patent: May 23, 2000
    Assignee: Stratasys, Inc.
    Inventors: Kevin L. Stuffle, Peter J. Creegan, John L. Lombardi, Paul D. Calvert, John A. O'Kelly, Robert A. Hoffman, Gabriel C. Chambers