Patents Assigned to John M. Henderson and Company Limited
  • 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