Patents by Inventor Berthold Hacker

Berthold Hacker 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
  • Device to measure the rotational position of a steering wheel
    Patent number: 6253630
    Abstract: A device is provided to detect the rotational position of a steering wheel. A rotating steering shaft connected to the steering wheel is coaxial with respect to a non-rotating steering column. On one surface of the steering column facing the steering shaft, there is an electrical resistance sheet that extends in the peripheral direction of the steering column. Fastened to the steering shaft are at least two wipers associated with the resistance sheet, such that at all times at least one wiper is in contact with the resistance sheet in a position defined by the rotational position of the steering shaft. Preferably, there are exactly three wipers that correspond to the same resistance sheet that are offset from one another by about 120 degrees.
    Type: Grant
    Filed: April 14, 1999
    Date of Patent: July 3, 2001
    Assignee: Linde Aktiengesellschaft
    Inventor: Berthold Häcker