Patents by Inventor Ernst Lude

Ernst Lude 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).

  • Vacuum cleaner
    Patent number: 4356591
    Abstract: A vacuum cleaner with a housing having a hood and at least one suction connection and at least one discharge opening, as well as with a dust filter and a suction apparatus provided with a blower and an electric motor, with the suction apparatus being surrounded by the hood. A noise damping or insulating device is arranged between the inner surface of the hood and the suction apparatus. The noise damping device has a damping sleeve surrounding the suction apparatus in the manner of a mantle.
    Type: Grant
    Filed: November 5, 1980
    Date of Patent: November 2, 1982
    Assignee: Rommag P. Worwag & Co.
    Inventor: Ernst Lude