Patents Assigned to J.P. Tool Ltd.
  • Patent number: 4277207
    Abstract: A broaching tool is described having an elongated tool body with an arcuate face of preferably half-round configuration. A plurality of recesses are formed on the arcuate face, each having a bottom face inclined inwardly and rearwardly within 1-15.degree. of coincidence with the longitudinal axis of the body and an abutment wall extending upwardly from a rearward portion of the bottom face. These recesses are arranged in helical paths of preferably increasing diameter in a rearward direction to form a series of spaced helical rows. Each recess contains a rotatably indexable cylindrical cutter disc. This configuration of broach has the advantages of providing excellent chip clearance between the cutters and also providing a uniform load on the tool during broaching.
    Type: Grant
    Filed: May 18, 1979
    Date of Patent: July 7, 1981
    Assignee: J.P. Tool Ltd.
    Inventor: Sylvester E. Proulx