Patents by Inventor Theodor Linke

Theodor Linke 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).

  • Hollow drill bit
    Patent number: 5082070
    Abstract: A hollow drill (1) is made up of a tubular carrier part (2), a cutter part (3) and an intermediate part (4) extending between the carrier part (2) and cutter part (3). The intermediate part (4) is rigidly fixed to the cutter part (3). The carrier part (2) and the intermediate part (4) have axially extending extensions (11, 12) which telescope one into the other with solder (8) located between and removably connecting the extensions (11, 12) together.
    Type: Grant
    Filed: November 13, 1990
    Date of Patent: January 21, 1992
    Assignee: Hilti Aktiengesellschaft
    Inventors: Josef Obermeier, Rolf Spangenberg, Theodor Linke