Patents by Inventor Hans-Josef Evens

Hans-Josef Evens 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: 5805061
    Abstract: A method and an electronic circuit are for monitoring the operation of a circuit including a plurality of intermittently powered parallel load elements, such as the flasher lamps of a vehicle. The total load current is directed through a measuring shunt resistor, and the resulting voltage across the shunt is measured and evaluated. The measured voltage initially arising across the shunt is used as a basis to establish a first voltage level for a load failure control threshold. A second voltage level greater than the first voltage level is established as a short-circuit control threshold. Then, the voltage value arising across the shunt during operation of the circuit is compared to the load failure control threshold and the short-circuit control threshold, and a load failure or a short-circuit is detected dependent upon and responsive to the result of these comparisons.
    Type: Grant
    Filed: April 8, 1997
    Date of Patent: September 8, 1998
    Assignees: Hella KG Hueck & Co., Temic Telefunken Microelectronic GmbH
    Inventors: Andreas Fritz, Hans-Josef Evens, Robin D. Ray
  • Patent number: 5374920
    Abstract: A directional and warning blink apparatus for a vehicle, particularly for a motor vehicle, comprises a directional warning blink sender (1) including a relay (12) with a driving circuit (5) therefor, a timing generator (4) and a control and logic circuit (3) for controlling timing operation of the timing generator. The control and logic circuit detects, via several input terminals, a chosen operational mode (warning blinking or directional blinking) as well as a blink signal lamp current and executes several control functions dependent upon these two items of information. An interior wiring of this directional warning blink sender can easily be adapted to various exterior wirings, in particular to varying numbers of blink signal lamps (26, 27).
    Type: Grant
    Filed: November 13, 1992
    Date of Patent: December 20, 1994
    Assignee: Hella KG Hueck & Co.
    Inventor: Hans-Josef Evens