Patents by Inventor Wolfgang Heinrich Grothe

Wolfgang Heinrich Grothe 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).

  • Industrial truck with a voltage transformer to supply pulsed DC to a lamp
    Patent number: 6392347
    Abstract: An industrial truck is provided with a direct current power supply and at least one electrical user (2), e.g., a lighting device located in a housing, wherein the power supply voltage of the power supply (3) is greater than the nominal voltage of the user (2). To connect the user (2) to the power supply, there is a voltage transformer (4) which is located inside the housing or in the immediate vicinity of the housing. The invention also relates to a voltage transformer which applies a power supply voltage to a user (2) in pulses, so that the power delivered to the user, as an average over time, does not exceed the nominal power of the user (2).
    Type: Grant
    Filed: November 24, 1999
    Date of Patent: May 21, 2002
    Assignee: Still GmbH
    Inventors: Franz-Josef Arping, Wolfgang Heinrich Grothe, Berthold Hacker
  • VOLTAGE TRANSFORMER WITH CLOCK PULSE GENERATOR
    Publication number: 20020001212
    Abstract: An industrial truck is provided with a direct current power supply and at least one electrical user (2), e.g., a lighting device located in a housing, wherein the power supply voltage of the power supply (3) is greater than the nominal voltage of the user (2). To connect the user (2) to the power supply, there is a voltage transformer (4) which is located inside the housing or in the immediate vicinity of the housing. The invention also relates to a voltage transformer which applies a power supply voltage to a user (2) in pulses, so that the power delivered to the user, as an average over time, does not exceed the nominal power of the user (2).
    Type: Application
    Filed: November 24, 1999
    Publication date: January 3, 2002
    Inventors: FRANZ-JOSEF ARPING, WOLFGANG HEINRICH GROTHE, BERTHOLD HACKER