Patents by Inventor William J. Blalock

William J. Blalock 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).

  • Expansion and length adjustment joint
    Patent number: 4720125
    Abstract: An expansion and length adjustment joint for use with a double walled metal chimney, the chimney having an inner flue wall and an outer casing wall, the adjustment joint having an inner sliding sleeve with a flange at one end thereof. An upper flue wall connecting band is sealingly disposed around the inner sliding sleeve flange and a flange of the inner flue wall. A gasket retaining collar is secured against the inner sliding sleeve, thus retaining a flue gas seal therealong with thermal expansion.
    Type: Grant
    Filed: December 22, 1986
    Date of Patent: January 19, 1988
    Assignee: Metal-Fab, Inc.
    Inventors: John D. Ream, William J. Blalock