Patents Assigned to Patent - Trewhand - Gesellschaft für elektrische Glühlampen mbH
  • Patent number: 7445534
    Abstract: A method and apparatus for producing a lamp in the case of which a lamp bulb closed at one end is filled through a feed opening for a luminous means are disclosed together with a lamp produced using this method. A dome of the lamp bulb can thereby be of smooth design without a pumping tip.
    Type: Grant
    Filed: June 9, 2005
    Date of Patent: November 4, 2008
    Assignee: Patent-Trewhand-Gesellschaft für elektrische Glühlampen mbH
    Inventors: Christoph Krieglmeyer, Christine Maier, Roland Mayer, Georg Rosenbauer
  • Patent number: 7439662
    Abstract: Electric lamp with a base at one end, having an inner vessel surrounded by an outer jacket, a base with electric connections supporting the inner vessel and the outer jacket, having the following features: a) the base has a base insulator with a central opening with a surrounding collar in which the inner vessel is held without cement; b) the base insulator has a circular, radially projecting segment with an associated upper and lower plateau with reference to the base; c) the outer jacket has a circular opening on the base side with a radially projecting edge that has an upper and lower contact surface with reference to the base, the lower contact surface of the edge being compatible with the upper plateau of the circular, radially projecting segment at the base insulator; and d) the outer jacket is fastened on the base by a cementless mechanical holding mechanism.
    Type: Grant
    Filed: July 30, 2004
    Date of Patent: October 21, 2008
    Assignee: Patent - Trewhand - Gesellschaft für elektrische Glühlampen mbH
    Inventors: Joachim Arndt, Uwe Fidler, Jürgen Gräf, Markus Herb, Anton Schlögl, Jürgen Waldmann, Bernhard Zöllner