Patents by Inventor Edward J. Laughlin

Edward J. Laughlin 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).

  • Motor control for refrigeration appliance
    Patent number: 5428965
    Abstract: A microprocessor speed control system for a refrigeration apparatus for controlling a speed of at least one variable speed motor is provided. The control system has an input for receiving demands to vary a speed of the motor and a memory where certain predetermined speed ranges are kept in a means for preventing the motor from being operated at the predetermined speed ranges. The predetermined speed ranges can be based upon speed ranges which cause excessive noise or vibration in the refrigeration appliance or any of its components.
    Type: Grant
    Filed: December 10, 1993
    Date of Patent: July 4, 1995
    Assignee: Whirlpool Corporation
    Inventors: Stefan H. Grunwald, Vincent P. Anderson, Edward J. Laughlin, Ronald J. Duncan