Patents by Inventor Gerd-Otto Eckstein

Gerd-Otto Eckstein 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).

  • Method of making a discharge vessel for compact low-pressure discharge lamps
    Patent number: 4801323
    Abstract: A tubular discharge vessel for a compact low pressure discharge lamp, espally a compact fluorescent lamp, is formed by heating and bending a straight glass tube into a U-shape with a plurality of straight sections and a 180.degree.-bend. Adequate vessel wall thickness is assured at the tubular sections where the bends are formed, by first heating a central section, moving sections lateral to the central section axially toward one another, thereby compressing the heated central section and thickening its walls, and bending or rotating the lateral sections into a parallel orientation. This prevents the bending process from unduly thinning the vessel walls, leading to breakage or rupture under internal gas pressure.
    Type: Grant
    Filed: May 19, 1987
    Date of Patent: January 31, 1989
    Assignee: Patent Treuhand-Gesellschaft fur elektrische Gluhlampen mbH
    Inventors: Lutz Klein, Ernst Panofski, Gerd-Otto Eckstein, Hans Schmidt, Josef Plischke