Patents Assigned to G. N. Tool Inc.
  • Boring reamer with end mill cutters
    Patent number: 4274771
    Abstract: A boring reamer with end mill cutters comprising a cutting edge portion, a straight shank and a taper shank. The cutting edge portion is formed at the forward edge of the straight shank, and has, at its forward end, end mill cutters each of which is formed with a chamfer angle portion and a relieving angle portion, and has a reamer, which is slightly larger in the diameter than the end mill cutters and provided with an ultra-left-hand twist right-hand helix angle, and which is formed into a saw-tooth like configuration having a land portion.
    Type: Grant
    Filed: June 28, 1979
    Date of Patent: June 23, 1981
    Assignee: G. N. Tool Inc.
    Inventor: Takayuki Nishimura