Patents by Inventor Wilhelm Vahs

Wilhelm Vahs 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).

  • Door closer
    Patent number: 4686739
    Abstract: A door closer the closing force of which can be adjusted is provided with a device for indicating the selected closing force. The device used to indicate the prevailing closing force is actuated in dependence on the adjustment of the spring which determines the closing force.
    Type: Grant
    Filed: May 22, 1986
    Date of Patent: August 18, 1987
    Assignee: Geze GmbH
    Inventors: Karl Fritsche, Wilhelm Vahs
  • Door closer
    Patent number: 4590639
    Abstract: A door closer the closing force of which can be adjusted is provided with a device for indicating the selected closing force. The device used to indicate the prevailing closing force is actuated in dependence on the adjustment of the spring which determines the closing force.
    Type: Grant
    Filed: May 16, 1983
    Date of Patent: May 27, 1986
    Assignee: Geze GmbH
    Inventors: Karl Fritsche, Wilhelm Vahs