Patents Assigned to The J. R. Clarkson Company
  • Packingless gate valve and actuator assemblies
    Patent number: 4007911
    Abstract: A packingless gate valve actuator assembly having a stepped through passage defined by respective half housings formed with passages of different diameter and respective bolt connector flanges disposed in face to face relation with spacer strips interposed between diametrically opposite flange face margins to define a laterally related gate passage, a compressible elastomeric liner sleeve fitted to the passage of greater diameter with its opposite ends protruding axially from the passage ends and the end opposed to the flange face defining the end of the smaller diameter passage formed to span the gate passage and provide a protruding lip sealingly engaging the last mentioned flange face in annular surrounding relation to the smaller diameter passage end, a gate having a leading knife edge slidingly mounted in the gate passage with the lead tip of the knife edge disposed to enter the line of seal and deform the lip into sealing engagement with the opposed face of the knife edge and gate in its reciprocal move
    Type: Grant
    Filed: April 24, 1975
    Date of Patent: February 15, 1977
    Assignee: The J. R. Clarkson Company
    Inventor: Curtis W. Clarkson
  • Packingless gate valve and actuator assemblies
    Patent number: 3945604
    Abstract: A packingless gate valve having a stepped through passage defined by respective half housings formed with passages of different diameter and respective bolt connector flanges disposed in face to face relation with spacer strips interposed between diametrically opposite flange face margins to define a laterally related gate passage, a compressible elastomeric liner sleeve fitted to the passage of greater diameter with its opposite ends protruding axially from the passage ends and the end opposed to the flange face defining the end of the smaller diameter passage formed to span the gate passage and provide a protruding lip sealingly engaging the last mentioned flange face in annular surrounding relation to the smaller diameter passage end, a gate having a leading knife edge slidingly mounted in the gate passage with the lead tip of the knife edge disposed to enter the line of seal and deform the lip into sealing engagement with the opposed face of the knife edge and gate in its reciprocal movement in the gate p
    Type: Grant
    Filed: April 11, 1974
    Date of Patent: March 23, 1976
    Assignee: The J. R. Clarkson Company
    Inventor: Curtis W. Clarkson