Patents by Inventor Erhard Thoma

Erhard Thoma 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).

  • Patent number: 5273374
    Abstract: A dowel setting device which can be employed together with a formless paving machine is described. A plurality of booms is pivotably disposed, looking in the direction of travel, ahead of the vehicle body and ahead of devices for tamping the concrete. Dowel retrievers are located at the ends of the booms. In a loading position, the dowel retrievers retrieve dowels from a magazine. Following a pivot movement, the dowel retrievers assume a setting position in which they extend, looking in the direction of travel, from the front into the area where the concrete is beginning to set. The dowels are ejected.
    Type: Grant
    Filed: December 30, 1991
    Date of Patent: December 28, 1993
    Inventors: Erhard Thoma, Michael Weinberger