Spring Biased Piston Feed Patents (Class 137/246.21)
  • Movable valve apparatus having conditioned lubricating surfaces
    Patent number: 9255650
    Abstract: Movable valve apparatus having conditioned lubricating surfaces are described. An example valve includes a valve packing having a graphite packing ring disposed within a bonnet of the fluid valve and a stem or shaft has a conditioned surface to hold a lubricating material. The conditioned surface of the stem or shaft is disposed within the bonnet and moves the lubricating material relative to and in contact with the graphite packing ring during operation of the fluid valve.
    Type: Grant
    Filed: December 13, 2013
    Date of Patent: February 9, 2016
    Assignee: Fisher Controls International, LLC
    Inventors: Mark John Linser, Wilbur D. Hutchens