Patents by Inventor Jorg Fischer

Jorg Fischer 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: 4829930
    Abstract: A pneumatic horn comprises a housing portion, a base portion connected with the latter, a sound horn, which is held in an opening of the housing portion, and a diaphragm which is fixed between the housing portion and the base portion and rests against an inner pipe connection piece. The housing portion and the base portion each comprise a ring. Each ring is connected with a sheet metal jacket or a sheet metal base, respectively, so as to be fixed against rotation relative to it. The housing portion and the base portion carry diaphragm holding surfaces which securely grip the diaphragm all around in a uniform manner when the housing and base portions are screwed together.
    Type: Grant
    Filed: May 5, 1987
    Date of Patent: May 16, 1989
    Inventors: Jorg Fischer, Peter Weimann