Patents by Inventor Mike C. Johnson

Mike C. Johnson 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).

  • Optimized blade root profile for steam turbine blades
    Patent number: 5147180
    Abstract: A turbine blade includes an airfoil portion, a platform portion from which the airfoil portion extends upwardly, and a root portion extending downwardly from the platform portion, the root portion includes in descending order an upper-most root neck, an intermediate root neck, and a lower-most root neck, an upper-most lug being formed beneath the upper-most root neck, an intermediate lug being formed beneath the intermediate neck, and a lower-most lug being formed beneath the lower-most root neck. The upper-most neck includes a first top radius R1 and a second lower radius R2, wherein a length of R1 is about 30% greater than a length of R2.
    Type: Grant
    Filed: March 21, 1991
    Date of Patent: September 15, 1992
    Assignee: Westinghouse Electric Corp.
    Inventor: Mike C. Johnson