Patents Assigned to Head Wrightson & Company Limited
  • Sealing means for rotary vessels
    Patent number: 4199155
    Abstract: In or for a large diameter rotary vessel having an end which projects into or through a stationary hood, a sealing arrangement comprising a wear ring surrounding the vessel, a sealing ring operatively associated with the wear ring, the sealing ring being mounted on a back-up ring surrounding the vessel and depending from the stationary hood, and means for applying constant pressure between the interfaces of the sealing ring and the wear ring.
    Type: Grant
    Filed: December 14, 1977
    Date of Patent: April 22, 1980
    Assignee: Head Wrightson & Company Limited
    Inventors: Allon C. Day, John G. Hogan