Patents by Inventor Mark H. Griffiths

Mark H. Griffiths 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).

  • Method of manufacturing a wax pattern of a bladed rotor
    Patent number: 5124105
    Abstract: In the manufacture of a wax pattern for use in the lost wax casting of a bladed rotor of the radial flow type, the bladed region of a master pattern is enclosed by a curable epoxy resin/aluminium powder composition. Sufficient of the cured resin composition is then machined away so that a plurality of resin composition segments are defined, one segment being interposed between adjacent blades on the master pattern. The segments are then removed from the master pattern and placed in an appropriately configured die member so as to define a complete die for the production of a wax pattern in the form of the master pattern.
    Type: Grant
    Filed: January 29, 1991
    Date of Patent: June 23, 1992
    Assignees: Rolls-Royce plc, Rolls-Royce Business Ventures Limited
    Inventors: James Broughton, Graham J. Marklew, Mark H. Griffiths, Hubert D. Sellars