Patents Assigned to Calconn, Inc.
  • Method of making packing material having expanded graphite dispersed throughout
    Patent number: 5716055
    Abstract: A minimum leakage packing system is provided for sealing pump shafts and the like. The packing is manufactured from twisted, exfoliated extruded, pultruded or slit graphite material that is braided, twisted, laid up or otherwise combined to form mechanical packing. A lubricant and/or sealant may be applied to the finished packing. Graphite foil may be applied to the packing for enhanced properties. The packing system preferably consists of a precision wedge set and at least three rings including compressible graphite material, the rings compressed to different percentages of their original heights. The outside rings will have the most compression and the inner ring or rings of the multi-ring assembly the least. All should be compressed less than the maximum amount to permit high conformance to the surface being sealed. The system may have an optional gasket washer following the last ring of compressed graphite material.
    Type: Grant
    Filed: July 22, 1996
    Date of Patent: February 10, 1998
    Assignee: Calconn, Inc.
    Inventors: Mark R. Wilkinson, Chester S. Hopper, Leslie K. Muir, Michael S. Muir
  • Packing material having expanded graphite dispersed throughout
    Patent number: 5687974
    Abstract: A minimum leakage packing system is provided for sealing pump shafts and the like. The packing is manufactured from twisted, exfoliated extruded, pultruded or slit graphite material that is braided, twisted, laid up or otherwise combined to form mechanical packing. A lubricant and/or sealant may be applied to the finished packing. Graphite foil may be applied to the packing for enhanced properties. The packing system preferably consists of a precision wedge set and at least three rings including compressible graphite material, the rings compressed to different percentages of their original heights. The outside rings will have the most compression and the inner ring or rings of the multi-ring assembly the least. All should be compressed less than the maximum amount to permit high conformance to the surface being sealed. The system may have an optional gasket washer following the last ring of compressed graphite material.
    Type: Grant
    Filed: March 15, 1996
    Date of Patent: November 18, 1997
    Assignee: Calconn, Inc.
    Inventors: Mark R. Wilkinson, Chester S. Hopper, Leslie K. Muir, Michael S. Muir