Patents by Inventor Charles B. Burk

Charles B. Burk 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).

  • Method for the controlled mechanical working of sintered porous powder metal shapes to effect surface and subsurface densification
    Patent number: 4059879
    Abstract: A method is provided for partially densifying a selected surface portion of a sintered porous powder metal element while applying restraining pressure to other selected portions of said element in order to inhibit growth and cracking of said element during the partial cold deformation thereof. The method is particularly applicable to the production of annular bearing rings.
    Type: Grant
    Filed: November 17, 1975
    Date of Patent: November 29, 1977
    Assignee: Textron Inc.
    Inventors: William J. Chmura, Ronald S. Slusarski, Charles B. Burk