Patents by Inventor Stefan H. Grunwald

Stefan H. Grunwald 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
  • Slider block radial compliance mechanism for a scroll compressor
    Patent number: 5011384
    Abstract: A slider block radial compliance mechanism includes a slider block and a bearing seat which form a subassembly and are located in a circular counterbore in the crankshaft. The slider block has a bore which receives the boss of an orbiting scroll. The orbiting scroll and its boss are held to an orbiting motion while the slider block, bearing seat and crankshaft rotates as a unit with respect to the boss.
    Type: Grant
    Filed: December 1, 1989
    Date of Patent: April 30, 1991
    Assignee: Carrier Corporation
    Inventors: Stefan H. Grunwald, Howard H. Fraser, Jr.