Patents by Inventor Wilfried Gehrer

Wilfried Gehrer 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).

  • Spreader dowel
    Patent number: 5725342
    Abstract: Spreading dowel, consisting of a dowel component (15) and a non circular spreader screw (1); whereby, the inner notch (17) of the dowel component (15) is fitted in its form for the outer contour of the spreader screw (1); whereby, the spreader screw (1) has one or more thread convolutions (9). By means of these thread convolutions (9), twisting the spreader screw (1) achieves the spreading expansion of the dowel component (15) together with an axial shifting of the spreader screw (1).
    Type: Grant
    Filed: March 29, 1996
    Date of Patent: March 10, 1998
    Assignee: Grass AG
    Inventor: Wilfried Gehrer