Patents Assigned to Carolina Twist Drill, Inc.
  • Fluted cutting tool and method of producing same
    Patent number: 4976325
    Abstract: A carbide-tipped drill bit and method for manufacture is presented which produces drill bits of consistent geometries in which the flutes are machine ground in one step, which eliminates the hand blending operation of the carbide insert as used in the prior art. As a result, carbide-tipped drill bits are manufactured having a single helix angle which is consistent from drill bit to drill bit.
    Type: Grant
    Filed: June 2, 1989
    Date of Patent: December 11, 1990
    Assignee: Carolina Twist Drill, Inc.
    Inventor: Carl Garbarino