Patents by Inventor MATTHIAS WALCHER

MATTHIAS WALCHER 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).

  • Drilling tool
    Patent number: 11400523
    Abstract: A drilling tool, in particular a spiral drill, has a drill longitudinal axis, at least two flutes extending at a twist angle with respect to the drill longitudinal axis, webs formed between the flutes, and lands formed on a lateral surface of the webs. Guide rings are at least partially formed on the lands. The guide rings extend at an angle different from the twist angle to the drill longitudinal axis. At least one guide chamfer is formed on at least one land in addition to the guide rings. The guide chamfer extends parallel to the twist angle and in front of the guide rings with respect to the direction of rotation of the drilling tool.
    Type: Grant
    Filed: March 8, 2018
    Date of Patent: August 2, 2022
    Assignee: CERATIZIT BALZHEIM GMBH & CO. KG
    Inventors: Rainer Walcher, Jochen Walcher, Matthias Walcher, Oliver Rapp
  • DRILLING TOOL
    Publication number: 20200376570
    Abstract: A drilling tool, in particular a spiral drill, has a drill longitudinal axis, at least two flutes extending at a twist angle with respect to the drill longitudinal axis, webs formed between the flutes, and lands formed on a lateral surface of the webs. Guide rings are at least partially formed on the lands. The guide rings extend at an angle different from the twist angle to the drill longitudinal axis. At least one guide chamfer is formed on at least one land in addition to the guide rings. The guide chamfer extends parallel to the twist angle and in front of the guide rings with respect to the direction of rotation of the drilling tool.
    Type: Application
    Filed: March 8, 2018
    Publication date: December 3, 2020
    Inventors: RAINER WALCHER, JOCHEN WALCHER, MATTHIAS WALCHER, OLIVER RAPP