Patents by Inventor Luigi Filippo Beltrame

Luigi Filippo Beltrame 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).

  • Electropneumatic horn
    Patent number: 7038576
    Abstract: An electropneumatic acoustic horn is disclosed, comprising an electric compressor unit for generating compressed air and a sound wave generator comprising at least an acoustic chamber associated to at least a volute wound acoustic duct adapted to propagate the produced sound to the outside. Air channelling means put the compressor unit in communication with each acoustic chamber. The compressor unit and the sound wave generator are mechanically connected in a removable way by fitting slidingly a collar.
    Type: Grant
    Filed: August 9, 2002
    Date of Patent: May 2, 2006
    Assignee: Stebel SPA
    Inventors: Corrado Di Giovanni, Luigi Filippo Beltrame