Patents Assigned to R. K. Carbon Fibers, Inc.
  • Carbonaceous friction materials
    Patent number: 5965658
    Abstract: The instant invention provides a non-asbestos friction material and method of making therefor having from about 2 to 20 wt % of carbonaceous fibers. The remainder of the friction material is an auxiliary material and a thermosetting resin. The carbonaceous fibers are derived from oxidized polyacrylonitrile based fibers. The wt % of bond carbon in the carbonaceous fibers is about 65 to 80.
    Type: Grant
    Filed: November 12, 1996
    Date of Patent: October 12, 1999
    Assignee: R.K Carbon Fibers Inc.
    Inventors: W. Novis Smith, Philip Boyd
  • Multi-directional friction materials
    Patent number: 5688577
    Abstract: The present invention provides a multi-directional friction material made from unidirectional carbonaceous and/or oxidized PAN based fibers. More particularly, the present invention teaches a multi-layered preform having at least three (3) unidirectional fabric layers oriented at different angles respective to each other to provide a superior heat dissipation properties in a friction material.
    Type: Grant
    Filed: July 27, 1995
    Date of Patent: November 18, 1997
    Assignee: R. K. Carbon Fibers, Inc.
    Inventors: W. Novis Smith, Toby Burnham