Patents by Inventor Karl Schottenheim

Karl Schottenheim 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).

  • Tensioning handle for root-canalling instruments
    Patent number: 5092769
    Abstract: Tensioning handle for a root-canalling instrument and comprising a grip (1) with an outside-threaded shank (2) at one end, an inside-threaded cap (3) that screws onto the shank, a bore (4) that extends axially through the shank and the cap, and a tensioner that surrounds a tool inserted in the bore and tightens around the shaft of the tool when the cap is screwed tight, characterized in that the tensioner comprises sleeves (10) that loosely surround the shaft (5) of the tool (6) and have opposing sloping surfaces (15 & 16) that displace them laterally when the cap is screwed on.
    Type: Grant
    Filed: October 30, 1990
    Date of Patent: March 3, 1992
    Assignee: Vereinigte Dentalwerke Antaeos-Beutelrock-Zipperer Zdarsky Ehrler GmbH & Co. KG
    Inventors: Johann Reiter, Karl Schottenheim