Patents by Inventor Volker Hainke

Volker Hainke 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).

  • Anchor bolt
    Patent number: 4408937
    Abstract: An anchor bolt comprising a tension rod with a male screw-threaded section and a frusto-conical head terminating in a cylindrical shank, in combination with a sleeve having a female screw-threaded section and an internal frusto-conical bore. The sleeve has a polygonal cross-section with axially parallel pre-weakened rupture lines, permitting the sleeve to spread as it is entered by the tension rod, forcing the corners of the polygon into the surrounding material.
    Type: Grant
    Filed: January 29, 1982
    Date of Patent: October 11, 1983
    Assignee: Hainke Volker
    Inventors: Volker Hainke, Hans U. Hainke