Patents by Inventor Frank Wolpert

Frank Wolpert 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).

  • Self-drilling screw
    Patent number: 8192124
    Abstract: Disclosed is a screw for hard wood, comprising a screw tip (3) with two cutting edges (5) that extend approximately parallel to each other and perpendicular to the longitudinal axis of the screw. The cutting angle of the cutting edges amounts to about 90°. A centering tip (7) which slightly protrudes from the two cutting edges (5) is embodied in the extension of the longitudinal axis of the screw. Said centering tip (7) prevents the screw from deviating to the side at the beginning of the drilling process.
    Type: Grant
    Filed: May 25, 2007
    Date of Patent: June 5, 2012
    Assignee: Adolf Wuerth GmbH & Co. KG
    Inventors: Frank Wolpert, Juergen Wanner, Andreas Wunderlich
  • Self-Drilling Screw
    Publication number: 20090142159
    Abstract: Disclosed is a screw for hard wood, comprising a screw tip (3) with two cutting edges (5) that extend approximately parallel to each other and perpendicular to the longitudinal axis of the screw. The cutting angle of the cutting edges amounts to about 90°. A centering tip (7) which slightly protrudes from the two cutting edges (5) is embodied in the extension of the longitudinal axis of the screw. Said centering tip (7) prevents the screw from deviating to the side at the beginning of the drilling process.
    Type: Application
    Filed: May 25, 2007
    Publication date: June 4, 2009
    Inventors: Frank Wolpert, Juergen Wanner, Andreas Wunderlich