Patents by Inventor Rudi Birk

Rudi Birk 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).

  • Masonry drill bit
    Patent number: 6328506
    Abstract: A masonry drill bit 1 having an active diameter of D, comprising a shaft 3 and a tip 5 for engaging a workpiece, the tip 5 including a central portion 11 extending ahead of an outer portion 13, wherein the central portion 11 has a width of at least 0.25D and is shaped to act as a chisel during percussion drilling, and wherein the outer portion 13 is shaped to cut a workpiece as the drill bit rotates. By virtue of the drill bit tip 5 configuration as described and claimed herein, a masonry drill bit 1 having improved performance is provided.
    Type: Grant
    Filed: July 17, 2000
    Date of Patent: December 11, 2001
    Assignee: Black & Decker Inc.
    Inventors: Geoff Turner, Rudi Birk
  • Masonry drill bit
    Patent number: 6102634
    Abstract: A masonry drill bit 1 having an active diameter of D, comprising a shaft 3 and a tip 5 for engaging a workpiece, the tip 5 including a central portion 11 extending ahead of an outer portion 13, wherein the central portion 11 has a width of at least 0.25 D and is shaped to act as a chisel during percussion drilling, and wherein the outer portion 13 is shaped to cut a workpiece as the drill bit rotates. By virtue of the drill bit tip 5 configuration as described and claimed herein, a masonry drill bit 1 having improved performance is provided.
    Type: Grant
    Filed: July 25, 1996
    Date of Patent: August 15, 2000
    Assignee: Black & Decker Inc.
    Inventors: Geoff Turner, Rudi Birk
  • Drill bit
    Patent number: 6021857
    Abstract: A masonry drill bit having an active diameter of D, comprising a shaft and a tip 1 for engaging a workpiece, wherein the tip 1 is formed with a plurality of stepped portions shaped to cut a workpiece as the drill bit rotates. By virtue of the drill bit tip 5 configuration as described and claimed herein, a masonry drill bit 1 having improved performance is provided.
    Type: Grant
    Filed: September 17, 1997
    Date of Patent: February 8, 2000
    Assignees: Black & Decker Inc., Plansee Tizit
    Inventors: Rudi Birk, Werner Ferstl, Ronald Huber, Walter Lempach