Patents by Inventor Peter Frank Critchley

Peter Frank Critchley 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).

  • Diaphragm for turbomachines and method of manufacture
    Patent number: 8262359
    Abstract: A turbine diaphragm includes an annulus of static blades and an outer diaphragm ring surrounding the annulus of static blades and welded to the outer platforms. Each static blade has an inner platform, an aerofoil, and an outer platform. The inner platforms serve the function of an inner diaphragm ring, thereby reducing material and manufacturing costs. Furthermore, confronting edges of the inner platforms have an interference fit with each other and the aerofoils are in a state of torsional stress between the inner and outer platforms. The latter two features improve the dynamic characteristics of the diaphragm.
    Type: Grant
    Filed: January 11, 2008
    Date of Patent: September 11, 2012
    Assignee: ALSTOM Technology Ltd.
    Inventors: Bryan Roy Palmer, David Littlewood, David Paul Blatchford, Peter Frank Critchley, Adrian Lord
  • Diaphragm for Turbomachines and Method of Manufacture
    Publication number: 20080170939
    Abstract: A turbine diaphragm includes an annulus of static blades and an outer diaphragm ring surrounding the annulus of static blades and welded to the outer platforms. Each static blade has an inner platform, an aerofoil, and an outer platform. The inner platforms serve the function of an inner diaphragm ring, thereby reducing material and manufacturing costs. Furthermore, confronting edges of the inner platforms have an interference fit with each other and the aerofoils are in a state of torsional stress between the inner and outer platforms. The latter two features improve the dynamic characteristics of the diaphragm.
    Type: Application
    Filed: January 11, 2008
    Publication date: July 17, 2008
    Inventors: Bryan Roy Palmer, David Littlewood, David Paul Blatchford, Peter Frank Critchley, Adrian Lord