Patents by Inventor David A. Diekman

David A. Diekman 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: 6725680
    Abstract: A multi compartment refrigeration appliance is provided wherein each compartment is to be maintained at an independently selected temperature. The appliance includes a temperature selection input device for each compartment, at least one compressor, at least one evaporator, at least one fan for creating an air flow over the evaporator, a temperature sensor located in each compartment, and a control circuit to receive an input from said temperature selection input device for each compartment and a temperature signal for each temperature sensor and to produce an error condition signal with a magnitude dependent on a difference between the selected temperature and the sensed temperature for each compartment. The control circuit also controls a speed of the fan in response to a greater of the error condition signals.
    Type: Grant
    Filed: January 20, 2003
    Date of Patent: April 27, 2004
    Assignee: Whirlpool Corporation
    Inventors: Dennis G. Schenk, John R. Wisnoski, David A. Diekman, Steven J. Kuehl