Patents by Inventor Ralph W. Sweitzer

Ralph W. Sweitzer 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).

  • Package heat exchanger system for heating and cooling
    Patent number: 4274581
    Abstract: A compact heating and cooling system in which air ducts are connected to a host exchanger system through which a coolant fluid from a condensing unit or a heating fluid from a compact water heater is selectively directed by a control circuit so that the system may be mounted outside a building to be heated and/or cooled.
    Type: Grant
    Filed: December 6, 1978
    Date of Patent: June 23, 1981
    Assignee: Raytheon Company
    Inventors: Herbert G. Hays, Ralph W. Sweitzer
  • Package heat exchanger system for heating and cooling
    Patent number: 4171772
    Abstract: A compact heating and cooling system in which air ducts are connected to a heat exchanger system through which a coolant fluid from a condensing unit or a heating fluid from a compact water heater is selectively directed by a control circuit so that the system may be mounted outside a building to be heated and/or cooled.
    Type: Grant
    Filed: February 3, 1978
    Date of Patent: October 23, 1979
    Assignee: Amana Refrigeration, Inc.
    Inventors: Herbert G. Hays, Ralph W. Sweitzer
  • Package heat exchanger system for heating and cooling
    Patent number: 4125151
    Abstract: A compact heating and cooling system in which air ducts are connected to a heat exchanger system through which a coolant fluid from a condensing unit or a heating fluid from a compact water heater is selectively directed by a control circuit so that the system may be mounted outside a building to be heated and/or cooled.
    Type: Grant
    Filed: June 24, 1976
    Date of Patent: November 14, 1978
    Assignee: Raytheon Company
    Inventors: Herbert G. Hays, Ralph W. Sweitzer