Patents Assigned to Everlasting Valve Co., Inc.
  • Rotating disc valve
    Patent number: 5396919
    Abstract: A disc valve is linearly actuated to effect rotation of its sealing disc during opening and closing operations. Disc rotation is effected by creating unbalanced frictional forces between the sealing surfaces during valve operation. Rotation of the disc produces a lapping action that in the process medium renews and polishes the metal seating surfaces with each operation.
    Type: Grant
    Filed: August 18, 1993
    Date of Patent: March 14, 1995
    Assignee: Everlasting Valve Co., Inc.
    Inventor: James T. Wilson