Patents by Inventor Franz-Peter Contzen

Franz-Peter Contzen 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).

  • Viewing glass for vacuum apparatus
    Patent number: 4986636
    Abstract: The invention is directed to a viewing glass having a transparent pane and a pair of flanges. In order to facilitate simple manufacture of the viewing glass, it is proposed that the pane be arranged in an inside step of the one of the flanges and be surrounded by an O-ring for producing a vacuum-tight connection. The edge of the pane and the step of the flange preferably have corresponding frustoconical surfaces.
    Type: Grant
    Filed: August 30, 1989
    Date of Patent: January 22, 1991
    Assignee: Leybold AG
    Inventors: Franz-Peter Contzen, Katrin Wilmers
  • 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