Patents by Inventor Hans P. Borufka

Hans P. Borufka 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).

  • Shroud band for a rotor wheel having integral rotor blades
    Patent number: 5154581
    Abstract: A shroud band for a rotor wheel having integral rotor blades wherein the shroud band has at least one Z-shaped separation gap at the band periphery, the Z-shaped gap having two parallel damping gaps which are axially spaced apart and which are inclined at an angle of from 70.degree. to 90.degree. relative to the axial direction. The damping gaps are narrow and are joined by an inclined wider free gap portion. During rotation, the damping gaps close up and the adjoining surfaces of the band come into frictional engagement whereas the free gap remains open.
    Type: Grant
    Filed: May 13, 1991
    Date of Patent: October 13, 1992
    Assignee: Mtu Motoren- und Turbinen- Union Munchen GmbH
    Inventors: Hans P. Borufka, Helmut Gross, Gerald Himmler