Patents Assigned to Kalplas, Inc.
  • Packing life extender ring
    Patent number: 5507502
    Abstract: A packing life extender ring assembly which includes a first annular ring and a second annular ring concentrically encircling the first ring, both rings having tapered surfaces matingly engaging one another. The first and second rings are both made of a composition containing 60% to 85% by weight virgin polytetrafluoruethylene, the remainder being calcium metasilicate.
    Type: Grant
    Filed: December 7, 1994
    Date of Patent: April 16, 1996
    Assignee: Kalplas, Inc.
    Inventor: Edward W. Dennison, Jr.