Patents by Inventor Harold T. Keller, deceased

Harold T. Keller, deceased 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).

  • Brazing sleeve having ceramic flux band and method for applying same
    Patent number: 4762674
    Abstract: A metal brazing sleeve includes a ceramic flux band formed on the sleeve adjacent an annular recess typically disposed near an open end of the sleeve for receiving a conventional braze preform, by adhering a powder flux to the sleeve by a tacky adhesive and then melting the powder flux in place, by internal heating of the tube. The ceramic flux band is hard and adherent, and resistant to abrasion effects during insertion of the sleeve into a tube, and provides a shadow effect for protecting an optional cemented powder flux band which may be formed on the braze ring.
    Type: Grant
    Filed: November 12, 1985
    Date of Patent: August 9, 1988
    Assignee: Westinghouse Electric Corp.
    Inventors: Wenche W. Cheng, Donald R. Stoner, Harold T. Keller, deceased
  • Brazing sleeve having ceramic flux band and method for applying same
    Patent number: 4624866
    Abstract: A metal brazing sleeve includes a ceramic flux band formed on the sleeve adjacent an annular recess typically disposed near an open end of the sleeve for receiving a conventional braze preform, by adhering a powder flux to the sleeve by a tacky adhesive and then melting the powder flux in place, by internal heating of the tube. The ceramic flux band is hard and adherent, and resistant to abrasion effects during insertion of the sleeve into a tube, and provides a shadow effect for protecting an optional cemented powder flux band which may be formed on the braze ring.
    Type: Grant
    Filed: December 27, 1984
    Date of Patent: November 25, 1986
    Assignee: Westinghouse Electric Corp.
    Inventors: Wenche W. Cheng, Donald R. Stoner, Harold T. Keller, deceased