Patents Assigned to Specialist Sealing Ltd.
  • Seals
    Patent number: 5467966
    Abstract: A floating gate valve seat has an integral static seal comprising a convex arcuate limb 9 and a projecting tip 25 on the limb arranged to contact a seat pocket surface 12 and place the limb in flexing stress to effect a seal at the tip 25. A set-back stop surface 15 on the valve seat limits the compression of the seal and the axial movement and the valve seat 7.
    Type: Grant
    Filed: September 6, 1994
    Date of Patent: November 21, 1995
    Assignee: Specialist Sealing Ltd.
    Inventor: Terence P. Nicholson
  • Static seal
    Patent number: 5195759
    Abstract: A static seal capable of accommodating significant lack of flatness comprises a PTFE envelope 1, within which is a filling 5 consisting of wound or nested turns of thin metal strip 7 perforated to provide resiliance in the direction of their width. Individual turns can move or collapse to different extents, thereby accommodating lack of flatness of surfaces to be sealed. Turns of fluid-impervious material may be distributed among the turns of perforated strip.
    Type: Grant
    Filed: August 6, 1991
    Date of Patent: March 23, 1993
    Assignee: Specialist Sealing Ltd.
    Inventor: Terence P. Nicholson