Patents by Inventor Robert Vlasak

Robert Vlasak 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 protection apparatus using fusible links
    Patent number: 3959984
    Abstract: The disclosure describes improved apparatus for protecting the motor of a refrigerant compressor. The apparatus includes fusible links and a magnetic contactor connected in series between a source of three-phase AC voltage and the compressor motor. If the contactor fails in the closed position, a relay energizes resistors which heat the links. In response to the heat, the links are switched to an open circuit condition that disconnects the compressor from the source of AC voltage.
    Type: Grant
    Filed: November 29, 1974
    Date of Patent: June 1, 1976
    Assignee: Lennox Industries Inc.
    Inventor: Robert Vlasak