Patents by Inventor Alan E. T. Grattidge

Alan E. T. Grattidge 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).

  • Vessel nozzle cleaning apparatus and methods
    Patent number: 4599967
    Abstract: The invention provides an arrangement for cleaning or deskulling the downwardly protruding nozzle of a vacuum degassing vessel comprising a rotatable tool carrier capable of being positioned below the degassing vessel; one or more scraping tools mounted on the tool carrier; means for rotating the tool carrier; and means for lowering the vessel and/or raising the tool carrier so as to engage the nozzle with the tools.
    Type: Grant
    Filed: November 13, 1984
    Date of Patent: July 15, 1986
    Assignee: John M. Henderson and Company Limited
    Inventors: Arthur D. Murphy, Alan E. T. Grattidge