Patents by Inventor Karl Michael Prewo

Karl Michael Prewo 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).

  • Composite rotor blade
    Patent number: 4111606
    Abstract: A compressor rotor blade for a turbomachine is disclosed. Techniques for increasing the strength to weight ratio of the blade while maintaining adequate resistance to foreign object damage are developed. In one specific embodiment an all composite construction employs matrix materials of varied ductilities and yield strengths to improve the energy absorbing capabilities of the blade.
    Type: Grant
    Filed: December 27, 1976
    Date of Patent: September 5, 1978
    Assignee: United Technologies Corporation
    Inventor: Karl Michael Prewo