Patents by Inventor Samuel Gregory Clifford

Samuel Gregory Clifford 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 and apparatus for reducing self sealing flow in combined-cycle steam turbines
    Patent number: 7040861
    Abstract: A method and apparatus for reducing self sealing flow in a combined cycle double flow steam turbine, the method and apparatus include providing a brush seal in a packing ring of a packing ring assembly at either end defining the double flow steam turbine.
    Type: Grant
    Filed: March 4, 2004
    Date of Patent: May 9, 2006
    Assignee: General Electric Company
    Inventors: Samuel Gregory Clifford, Michael Joseph Boss, David Forrest Loy, Norman Douglas Lathrop
  • Active thrust control system for combined cycle steam turbines with large steam extraction
    Patent number: 6705086
    Abstract: A combined cycle steam turbine including a system for providing process extraction steam includes a control system for counteracting the thrust effect of the steam extraction flow at the exhaust of the high pressure section of the steam turbine. The control system includes a valve and piping arrangement for diverting HP exhaust packing leak-off steam from a lower pressure stage to a higher pressure stage of an intermediate pressure section of the steam turbine.
    Type: Grant
    Filed: December 6, 2002
    Date of Patent: March 16, 2004
    Assignee: General Electric Company
    Inventors: Klaus Manfred Retzlaff, Samuel Gregory Clifford, David William Hicks