Patents by Inventor Martin R. Jarrett

Martin R. Jarrett 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).

  • Ductile ultra-high strength aluminium alloy components
    Patent number: 5413650
    Abstract: The mechanical properties of aluminium alloy extrusion in a specified transverse direction are improved by upsetting the extrusion billet in at least one direction chosen with reference to the specified transverse direction. For example, the extrusion billet may be of generally circular cross-section with one or two opposite segments arising. The extrusion may be subjected to thermomechanical treatment and/or vibration treatment. A preferred final thermomechanical treatment is also described.
    Type: Grant
    Filed: March 8, 1993
    Date of Patent: May 9, 1995
    Assignee: Alcan International Limited
    Inventors: Martin R. Jarrett, William Dixon
  • Metal extrusion
    Patent number: 5309748
    Abstract: A billet of extrudable metal, particularly an Al alloy is tapered at its back end. The billet is compressed longitudinally so that the metal of the tapered end is upset transversely. The compressed billet is hot extruded. The upsetting improves the fracture toughness of the back end of the extrusion. This is useful in long extrusions for the aircraft industry.
    Type: Grant
    Filed: March 3, 1992
    Date of Patent: May 10, 1994
    Assignee: Alcan International Limited
    Inventors: Martin R. Jarrett, William Dixon