Patents by Inventor Hans Drenkard

Hans Drenkard 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).

  • Contoured step entry rotor casing
    Patent number: 4844692
    Abstract: A gas turbine engine having a turbine casing with a contoured entry. The contoured entry is located upon the housing such that upon assembly of the engine the contoured entry is located relatively directly prior to the turbine blades. The contoured entry is positioned relatively directly prior to a spacing between the tips of the turbine blades and the housing such that gases are directionally restricted away from the spacing and into the turbine blades.
    Type: Grant
    Filed: August 12, 1988
    Date of Patent: July 4, 1989
    Assignee: Avco Corporation
    Inventors: George Minkkinen, Hans Drenkard