Patents by Inventor Ingrid Liebig-Hundius

Ingrid Liebig-Hundius 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).

  • Undercut anchor element that can be mounted with positive engagement
    Patent number: 7150595
    Abstract: An undercut anchor element comprising a shank of an anchor bolt. The shank passes through a base part, which is provided for effecting an anchoring, passes through a spacer sleeve, and at the end thereof is provided with a tightening head. The tightening head can be pulled inside the base part, which is subdivided into anchoring segments by slots provided over a portion of the length of the base part. The slots lead from the front free end of the base part up and into the area of an encircling groove. The anchoring segments have the outer shape of two truncated cones which coincide with their ends that have a smaller diameter. The truncated cone that is located in front in a direction of mounting has an obtuse cone angle of greater than 150° and the adjoining truncated cone has an acute cone angle of less than 30°.
    Type: Grant
    Filed: July 31, 2000
    Date of Patent: December 19, 2006
    Assignee: Heinrich Liebig Stahldubelwerke GmbH
    Inventors: Heinrich Liebig, Ingrid Liebig-Hundius, Legal Representative, Heinz Joachim Liebig, Legal Representative
  • Undercut anchor element that can be mounted with positive engagement
    Publication number: 20040253075
    Abstract: An undercut anchor element comprising a shank of an anchor bolt. The shank passes through a base part, which is provided for effecting an anchoring, passes through a spacer sleeve, and at the end thereof is provided with a tightening head. The tightening head can be pulled inside the base part, which is subdivided into anchoring segments by slots provided over a portion of the length of the base part. The slots lead from the front free end of the base part up and into the area of an encircling groove. The anchoring segments have the outer shape of two truncated cones which coincide with their ends that have a smaller diameter. The truncated cone that Is located in front In a direction of mounting has an obtuse cone angle of greater than 150° and the adjoining truncated cone has an acute cone angle of less than 30°.
    Type: Application
    Filed: May 21, 2003
    Publication date: December 16, 2004
    Inventors: Heinrich Liebig, Ingrid Liebig-Hundius, Heinz Joachim Liebig