Patents by Inventor Franz Krenn

Franz Krenn 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).

  • Drill bit for drilling rock
    Patent number: 6550555
    Abstract: A drill bit for drilling rock has an elongated shaft and at least one cutting plate at one end. A clearance angle &bgr; of the cutting edges, at least in segments, increases with increasing distance from the rotary axis. A wedge angle &ggr; of the cutting edges, at least in segments, decreases with increasing distance from the rotary axis.
    Type: Grant
    Filed: February 14, 2001
    Date of Patent: April 22, 2003
    Assignees: Alpen-May-Kestag GmbH, Ceratizit Austria Aktiengesellschaft
    Inventors: Ronald Huber, Franz Krenn
  • Drill bit for drilling rock
    Publication number: 20010013431
    Abstract: The drill bit for drilling rock has an elongated shaft and at least one cutting plate at one end. A clearance angle &bgr; of the cutting edges, at least in segments, increases with increasing distance from the rotary axis. A wedge angle &ggr; of the cutting edges, at least in segments, decreases with increasing distance from the rotary axis.
    Type: Application
    Filed: February 14, 2001
    Publication date: August 16, 2001
    Inventors: Ronald Huber, Franz Krenn