Patents by Inventor Fred T. Willett

Fred T. Willett 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: 7984548
    Abstract: A vane unit system having a plurality of vane units having at least one airfoil projecting from a base is modified by placing a hole in the base and receiving a pin which extends between adjacent bases of vane units. A series of modified bases form a rigid ring of vanes that are less susceptible to vane motion caused by pressure fluctuations within the compressor of a gas turbine. A blade assembly tool having a shape to fit within the slit in a casing that receives the vane units allows for the installation of vane units with interlocking pins without the necessity of having to remove the rotor from the casing.
    Type: Grant
    Filed: October 31, 2007
    Date of Patent: July 26, 2011
    Assignee: DRS Power Technology Inc.
    Inventors: Rodger O. Anderson, Fred T. Willett
  • Patent number: 7651319
    Abstract: A vane unit system having a plurality of vane units having at least one air foil projecting from a base. The base has a hole which receives a pin which extends between adjacent bases of vane units therein forming a rigid ring of vanes that are less susceptible to vane motion caused by pressure fluctuations within the compressor of a gas turbine. A blade assembly tool having a shape to fit within the slot in a casing that receives the vane units allows for the installation of vane units with interlocking pins without the necessity of having to remove the rotor from the casing.
    Type: Grant
    Filed: April 18, 2005
    Date of Patent: January 26, 2010
    Assignee: DRS Power Technology Inc.
    Inventors: Rodger O. Anderson, Fred T. Willett
  • Publication number: 20090110552
    Abstract: A vane unit system having a plurality of vane units having at least one airfoil projecting from a base is modified by placing a hole in the base and receiving a pin which extends between adjacent bases of vane units. A series of modified bases form a ring of rigid vanes that are less susceptible to vane motion caused by pressure fluctuations within the compressor of a gas turbine. A blade assembly tool having a shape to fit within the slot in a casing that receives the vane units allows for the installation of vane units with pins locking to shims or adjacent vanes without the necessity of having to remove the rotor from the casing. Preferably, the pins are coiled straps resiliently engaging at least one but preferably both holes in two adjacent vanes.
    Type: Application
    Filed: October 31, 2007
    Publication date: April 30, 2009
    Inventors: Rodger O. Anderson, Fred T. Willett
  • Publication number: 20080282541
    Abstract: A vane unit system having a plurality of vane units having at least one airfoil projecting from a base is modified by placing a hole in the base and receiving a pin which extends between adjacent bases of vane units. A series of modified bases form a rigid ring of vanes that are less susceptible to vane motion caused by pressure fluctuations within the compressor of a gas turbine. A blade assembly tool having a shape to fit within the slit in a casing that receives the vane units allows for the installation of vane units with interlocking pins without the necessity of having to remove the rotor from the casing.
    Type: Application
    Filed: October 31, 2007
    Publication date: November 20, 2008
    Inventors: Rodger O. Anderson, Fred T. Willett
  • Patent number: 6984108
    Abstract: A vane unit system having a plurality of vane units having at least one air foil projecting from a base. The base has a hole which receives a pin which extends between adjacent bases of vane units therein forming a rigid ring of vanes that are less susceptible to vane motion caused by pressure fluctuations within the compressor of a gas turbine. A blade assembly tool having a shape to fit within the slot in a casing that receives the vane units allows for the installation of vane units with interlocking pins without the necessity of having to remove the rotor from the casing.
    Type: Grant
    Filed: February 24, 2003
    Date of Patent: January 10, 2006
    Assignee: DRS Power Technology Inc.
    Inventors: Rodger O. Anderson, Fred T. Willett
  • Publication number: 20030231957
    Abstract: A vane unit system having a plurality of vane units having at least one air foil projecting from a base. The base has a hole which receives a pin which extends between adjacent bases of vane units therein forming a rigid ring of vanes that are less susceptible to vane motion caused by pressure fluctuations within the compressor of a gas turbine. A blade assembly tool having a shape to fit within the slot in a casing that receives the vane units, allows for the installation of vane units with interlocking pins without the necessity of having to remove the rotor from the casing.
    Type: Application
    Filed: February 24, 2003
    Publication date: December 18, 2003
    Applicant: Power Technology Incorporated
    Inventors: Rodger O. Anderson, Fred T. Willett