Patents by Inventor Hartmut Stephan

Hartmut Stephan 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).

  • Patent number: 6428194
    Abstract: A headlight for a vehicle operating in accordance with a projection principle has a light source, a reflector, a shield arranged in a beam path of a light reflected by the reflector for producing a bright-dark limit of a light bundle exiting the headlight, a lens through which the light passing on the shield passes, a light-permeable cover member arranged after the lens in a light outlet direction, the cover member having a region which deviates the passing light upwardly, and a screening device arranged between the shield and the cover member and formed so that at least a part of the light passing on the screen which would pass through the region of the cover member is screened.
    Type: Grant
    Filed: August 11, 1999
    Date of Patent: August 6, 2002
    Assignee: Robert Bosch GmbH
    Inventors: Horst Oschmann, Hartmut Stephan
  • Publication number: 20020057577
    Abstract: A headlight for a vehicle operating in accordance with a projection principle has a light source, a reflector, a shield arranged in a beam path of a light reflected by the reflector for producing a bright-dark limit of a light bundle exiting the headlight, a lens through which the light passing on the shield passes, a light-permeable cover member arranged after the lens in a light outlet direction, the cover member having a region which deviates the passing light upwardly, and a screening device arranged between the shield and the cover member and formed so that at least a part of the light passing on the screen which would pass through the region of the cover member is screened.
    Type: Application
    Filed: August 11, 1999
    Publication date: May 16, 2002
    Inventors: HORST OSCHMANN, HARTMUT STEPHAN
  • Publication number: 20010019484
    Abstract: A headlight for a vehicle operating in accordance with the projection principle has a light source, a reflector which reflects light emitted by the light source as a converging light beam, a screen arranged in a beam path of the light beam reflected by the reflector and screening a part of the light beam, a lens arranged after the screen in a light outlet direction for projecting an upper edge of the screen as a bright-dark limit of a light bundle exiting the headlight, so that a part of the light bundle reflected by the reflector illuminates at least a region arranged at a distance above the bright-dark limit, the screen being provided with at least one opening which is located at a defined region below the upper edge of the screen and formed so that a part of the light beam reflected by the reflector passes through the opening and illuminates at least one region above the bright-dark limit.
    Type: Application
    Filed: January 30, 2001
    Publication date: September 6, 2001
    Inventors: Friedrich Schauwecker, Horst Oschmann, Hartmut Stephan