Patents Assigned to Inter-City Products Corporation (USA)
  • Fan control arrangement for a two stage furnace
    Patent number: 5027789
    Abstract: The present invention involves a two stage furnace and a method of controlling the fans. In the furnace, a high pressure switch indicates whether sufficient air is present to support high combustion. Normally the furnace operates at one of the combustion settings. The circulator fan operates at the high speed setting when the high pressure switch indicates that sufficient air is present for high combustion, and operates at the low speed setting when the high pressure switch indicates that insufficient air is present for high combustion.
    Type: Grant
    Filed: February 9, 1990
    Date of Patent: July 2, 1991
    Assignee: Inter-City Products Corporation (USA)
    Inventor: Gregory A. Lynch
  • Thermostat speed bar graph for variable speed temperature control system
    Patent number: 5005365
    Abstract: A thermostat for a variable speed temperature control system. The thermostat has a processor for determining a utilization ratio to drive the temperature control system. The processor also drives a display which graphically exhibits the utilization ratio.
    Type: Grant
    Filed: December 2, 1988
    Date of Patent: April 9, 1991
    Assignee: Inter-City Products Corporation (USA)
    Inventor: Gregory A. Lynch
  • Serpentine heat exchanger
    Patent number: 4982785
    Abstract: The present invention is an improved serpentine heat exchanger. Two metal sheets are crimped together, sealed at their abutting edges. The sheets have matching depressions which from a serpentine air passageway. Within the passageway are elongated ribs and column like dimples which serve as obstruction to the air flow, directing fluid flow over under-utilized portions of the passageway and generating turbulent fluid flow near heat transfer surfaces.
    Type: Grant
    Filed: March 6, 1990
    Date of Patent: January 8, 1991
    Assignee: Inter-City Products Corporation (USA)
    Inventor: Ronald S. Tomlinson
  • Warmup method for a two stage furnace
    Patent number: 4976459
    Abstract: The present invention involves a two stage furnace and a method of warming its heat exchanger. The furnace includes a gas valve with low and high combustion settings, and inducer and circulator fans with low and high speed settings. When a call for heat is present, the inducer fan and gas valve operate at high. After a heat on delay period, the circulator fan operates at low speed to provide an initial warm stream of air from the furnace.
    Type: Grant
    Filed: February 9, 1990
    Date of Patent: December 11, 1990
    Assignee: Inter-City Products Corporation (USA)
    Inventor: Gregory A. Lynch