Patents by Inventor Robert T. Smuda

Robert T. Smuda 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).

  • Primary air duct cleaning apparatus for recovery boilers
    Patent number: 4538552
    Abstract: A primary air duct for a chemical recovery furnace is rectangular in cross section. Smelt accumulates on the walls of the air duct at the furnace end. A scraper structure is comprised of a pair of C-channels hinged together at one end. A mechanism moves the hinged scraper forward so it can be guided into scraping contact with the duct walls. The edges of the C-channels are guided by pin and groove engagement between the channels and the duct walls. The scraper is reciprocated from an inoperative position to a scraping mode by a rod to which force is applied.
    Type: Grant
    Filed: December 3, 1984
    Date of Patent: September 3, 1985
    Assignee: Combustion Engineering, Inc.
    Inventor: Robert T. Smuda