Third-stage turbine bucket airfoil
Patent 6474948 Issued on November 5, 2002. Estimated Expiration Date: 
June 22, 2021. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
June 22, 2021. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesGas turbine engine blade Turbine nozzle Bucket for the last stage of a steam turbine Bucket for the last stage of a steam turbine Turbine blade with enhanced cooling and profile optimization Patent #: 5980209 Inventors
ApplicationNo. 886406 filed on 06/22/2001US Classes:416/243, Concave surface416/223ATurbo machineExaminersPrimary: Look, Edward K.Assistant: Nguyen, Ninh H. Attorney, Agent or FirmInternational ClassF01D 005/14AbstractThe third-stage buckets have airfoil profiles substantially in accordance with Cartesian coordinate values of X, Y and Z set forth in inches in Table I wherein Z is a perpendicular distance from a plane normal to a radius of the turbine centerline and containing the X and Y values with the Z value commencing at zero in the X, Y plane at the radially innermost aerodynamic section of the airfoil and X and Y are coordinates defining the airfoil profile at each distance Z. The X, Y and Z values may be scaled as a function of the same constant or number to provide a scaled-up or scaled-down airfoil section for the bucket.Other References
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