Patents by Inventor Thomas Wöhrstein

Thomas Wöhrstein 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).

  • Patent number: 8550569
    Abstract: A shank chisel including a chisel head and a chisel shank, wherein the chisel shank bears a clamping sleeve in which the chisel shank is held captively in a direction of a longitudinal axis and is freely rotatably about the longitudinal axis. To allow the shank chisel to be both assembled and disassembled through a chisel receptacle of a chisel holder that is formed as a receiving bore, according to this invention, the chisel shank bears at its end remote from the chisel head a shank extension, the shank extension has a tool receptacle, and the tool receptacle is accessible by way of a spacing region of the shank extension in the axial direction of the chisel that is set back from the lateral surface of the chisel shank and/or from the lateral surface of the clamping sleeve.
    Type: Grant
    Filed: May 30, 2008
    Date of Patent: October 8, 2013
    Assignee: Betek Bergbau- und Hartmetalltechnik Karl-Heinz Simon GmbH & Co. KG
    Inventors: Thomas Wöhrstein, Thomas Lehnert
  • Publication number: 20100194177
    Abstract: The invention relates to a shank chisel comprising a chisel head (10) and a chisel shank (20), wherein the chisel shank bears a clamping sleeve (23), in which the chisel shank is held captively in the direction of its longitudinal axis and freely rotatably about its longitudinal axis. To allow such a shank chisel to be both assembled and disassembled through a chisel receptacle (31) of a chisel holder (30) that is formed as a receiving bore, it is provided according to the invention that the chisel shank bears at its end remote from the chisel head a shank extension (20.1), that the shank extension has a tool receptacle (26), and that the tool receptacle is accessible by way of a spacing region of the shank extension in the axial direction of the chisel that is set back from the lateral surface of the chisel shank and/or from the lateral surface of the clamping sleeve.
    Type: Application
    Filed: May 30, 2008
    Publication date: August 5, 2010
    Inventors: Thomas Wöhrstein, Thomas Lehnert