Patents Assigned to SS Indus.
  • Patent number: 4627665
    Abstract: A pick type bit is disclosed with an improved socket for a carbide insert. The cutter body of the bit is cold-headed from a steel blank to provide a cylindrical shank and a conical head with a socket in the forward end. The cylindrical shank is roll-formed to provide a retaining groove and an intermediate section is roll-formed to provide an extraction groove between the head and the shank. The cold-heading includes an initial step of squaring-up the forward end of the blank by cold-heading it into cylindrical shape with a flat forward end and then punching the socket. This provides a socket of densified work-hardened steel. The bit is completed by brazing the base of a carbide insert in mating relation with the socket in the head.
    Type: Grant
    Filed: April 4, 1985
    Date of Patent: December 9, 1986
    Assignees: SS Indus., Kennametal, Inc.
    Inventors: Paul E. Ewing, B. Randall Grubb