Patents by Inventor James Ranck Harnish

James Ranck Harnish 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).

  • Control system for heat pump and furnace combination
    Patent number: 4102390
    Abstract: A residential-type, heat pump-furnace system with control means for sequencing the activation of the heat pump and furnace operation depending on the heating load. The heat pump remains operational until the air off the furnace has reached some predetermined temperature to prevent an undesirable drop in the temperature of air entering the enclosure. Also, at termination of the defrost cycle, the heat pump will resume operation in the heating mode without the compressor shutting down.
    Type: Grant
    Filed: May 2, 1977
    Date of Patent: July 25, 1978
    Assignee: Borg-Warner Corporation
    Inventors: James Ranck Harnish, Larry Allan Raffensberger
  • Check valve for heat pump systems
    Patent number: 4100935
    Abstract: An improvement in ball-type check valves of the type used in heat pump systems. The valve is designed so that the pressure differential across the ball is significantly higher than in prior art devices. This assures that the ball is held away from the seat in the full flow mode, even when the valve is installed in a vertical position.
    Type: Grant
    Filed: April 28, 1977
    Date of Patent: July 18, 1978
    Assignee: Borg-Warner Corporation
    Inventor: James Ranck Harnish