Patents by Inventor Graham Walker Lewis

Graham Walker Lewis 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).

  • Refrigeration system having a compressor driven by a magnetic coupling
    Patent number: 11867181
    Abstract: A refrigeration system includes a compressor having a hermetically sealed housing and a compression mechanism which is positioned inside the housing; a condenser which is fluidly connected to the compressor; an evaporator which is fluidly connected between the condenser and the compressor; a magnetic coupling having a drive coupling half positioned outside the housing and a driven coupling half positioned inside the housing and separated from the drive coupling half by a separation wall portion of the housing; and a fluid conduit for communicating a portion of liquid refrigerant from the condenser to an inside surface of the separation wall portion. During operation, the liquid refrigerant from the condenser is evaporated on or adjacent the inside surface of the separation wall portion to thereby dissipate heat generated by magnetically induced eddy currents in the separation wall portion.
    Type: Grant
    Filed: October 29, 2020
    Date of Patent: January 9, 2024
    Inventors: Alexander David Leyderman, Ralph James Carl, Jr., Graham Walker Lewis, Andrew Bascom McCandless, Jeongkwan Lee, Geoffrey Reynolds Harmon
  • REFRIGERATION SYSTEM HAVING A COMPRESSOR DRIVEN BY A MAGNETIC COUPLING
    Publication number: 20220136509
    Abstract: A refrigeration system includes a compressor having a hermetically sealed housing and a compression mechanism which is positioned inside the housing; a condenser which is fluidly connected to the compressor; an evaporator which is fluidly connected between the condenser and the compressor; a magnetic coupling having a drive coupling half positioned outside the housing and a driven coupling half positioned inside the housing and separated from the drive coupling half by a separation wall portion of the housing; and a fluid conduit for communicating a portion of liquid refrigerant from the condenser to an inside surface of the separation wall portion. During operation, the liquid refrigerant from the condenser is evaporated on or adjacent the inside surface of the separation wall portion to thereby dissipate heat generated by magnetically induced eddy currents in the separation wall portion.
    Type: Application
    Filed: October 29, 2020
    Publication date: May 5, 2022
    Inventors: Alexander David Leyderman, Ralph James Carl, JR., Graham Walker Lewis, Andrew Bascom McCandless, Jeongkwan Lee, Geoffrey Reynolds Harmon