Patents by Inventor Heiko Friedrich

Heiko Friedrich 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: 6124576
    Abstract: In an arrangement for limiting the temperature of a glass-ceramic cooking zone including a cooking zone control unit which controls the electric power supply to the heating elements of the cooking zones by way of an impulse width control arrangement with a cycling relay, an additional module with a signal processing unit is provided with temperature sensors for sensing the cooking zone temperatures so as to provide temperature signals to an evaluation circuit which compares the temperature values with a maximum temperature value and keeps the cycling relay in an open position when the temperature values reach the maximum temperature to thereby interrupt the power supply to the heating elements and the signal processing unit and opens a main power supply if the temperature still rises after having reached the maximum value.
    Type: Grant
    Filed: June 16, 1999
    Date of Patent: September 26, 2000
    Assignee: Cherry GmbH
    Inventors: Martin Zapf, Heiko Friedrich