Patents by Inventor Francesco Vittori

Francesco Vittori 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).

  • Magnetic valve for use with vacuum
    Patent number: 4647011
    Abstract: A magnetic valve for use with vacuum which has an improved junction between the stem and the valve disk which prevents detritus from impairing the seal of the valve. The valve has a magnetic drive coil outside a vacuum tight casing and an armature within the casing to which a valve stem is connected. A junction between the valve stem and the valve disk includes a head on one of the two components and a beaded margin enveloping the head on the other of the two components. An annular gasket is disposed between the head and the beaded margin.
    Type: Grant
    Filed: June 27, 1985
    Date of Patent: March 3, 1987
    Assignee: Leybold-Heraeus GmbH
    Inventors: Franz-Peter Contzen, Gerhard Jokisch, Francesco Vittori