Patents by Inventor Hermann F. Prokop

Hermann F. Prokop has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Rotary cutting tool
    Patent number: 6929434
    Abstract: There is now provided a rotary cutting tool, particularly a drill, that has at least two cutting edges that respectively comprise a main cutting edge and that respectively are disposed, particularly symmetrically, with respect to the central axis of a cutter portion, whereby the radius of the main cutting edges is less than the maximal cutting edge radius of the cutter portion. A secondary cutting edge is associated with a main cutting edge, this secondary cutting edge is curvilinear in at least a portion and is configured as smooth finishing cutting edge, this secondary cutting edge comprises a plurality of curve-forming radii, whereby in an outer smooth finishing region within the region of the maximal cutting edge radius, the curve-forming radius of the smooth finishing cutting edge is greater than the maximal cutting edge radius. The cutter portion that is adjacent to the outer smooth finishing region is tapered by a taper that diminishes the size in the direction away from the main cutting edges.
    Type: Grant
    Filed: January 31, 2003
    Date of Patent: August 16, 2005
    Assignee: Kennametal Inc.
    Inventor: Hermann F. Prokop
  • Rotary cutting tool
    Publication number: 20030175085
    Abstract: There is now provided a rotary cutting tool, particularly a drill, that has at least two cutting edges that respectively comprise a main cutting edge and that respectively are disposed, particularly symmetrically, with respect to the central axis of a cutter portion, whereby the radius of the main cutting edges is less than the maximal cutting edge radius of the cutter portion. A secondary cutting edge is associated with a main cutting edge, this secondary cutting edge is curvilinear in at least a portion and is configured as smooth finishing cutting edge, this secondary cutting edge comprises a plurality of curve-forming radii, whereby in an outer smooth finishing region within the region of the maximal cutting edge radius, the curve-forming radius of the smooth finishing cutting edge is greater than the maximal cutting edge radius. The cutter portion that is adjacent to the outer smooth finishing region is tapered by a taper that diminishes the size in the direction away from the main cutting edges.
    Type: Application
    Filed: January 31, 2003
    Publication date: September 18, 2003
    Inventor: Hermann F. Prokop