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| Number | Title | Issue Date |
| 7090261 | Animal watering system with keyed components A watering system for a poultry house comprises a watering line which is suspended from a stabilizing bar by means of a clip. The watering line is comprised of a plurality of pipe segments connected together by a coupling mechanism. The coupling mechanism includes a... | 08/15/2006 |
| 7069925 | Pressure relief system for a gas fireplace A pressure relief system for a gas fireplace. The pressure relief system has a flue pipe with an opening in its side. A pressure relief plate is coupled to the flue pipe so that it is movable between an open and a closed state. The pressure relief plate positioned s... | 07/04/2006 |
| 6629523 | Heated make-up air system A heated make-up air system comprising a duct structure having a direct gas fired burner mounted therein. Adjacent the burner there is provided an opening for permitting air to flow there through. Mounted adjacent the opening one or more pivotally mounted... | 10/07/2003 |
| 5346126 | Device for controlling heating efficiency of water heater A device for use in improving the heating efficiency of a water heater comprises a housing mounted over the heat collecting pieces of the water heater and provided with at least a set of ventilating ports, each of which is composed of a predetermined numb... | 09/13/1994 |
| 5259411 | Flow control A flow control has a rotary gate residing within an internal flow space in a conduit. The gate is mounted for movement relative to the conduit between first and second positions, the gate in the first and second positions accounting for a different flow r... | 11/09/1993 |
| 5244147 | Furnace pressure control method A method of controlling the pressure in an incinerator for incinerating municipal refuse, industrial waste, etc. Exhaust gas from an incinerator typically passes through an exhaust gas cooler and an exhaust gas treating device and then discharged into the... | 09/14/1993 |
| 5010766 | Error compensation for measuring gauges A measuring gauge for error compensation of a measured characteristic of a moving sheet measures X, Y lateral displacement of the upper and lower transducer heads of a moving scanner in a cross direction across the paper. This is accomplished by the use o... | 04/30/1991 |
| 4846144 | Cooking range The invention is concerned with a cooking range, especially suitable for mobile homes, which utilizes gas burners, where the exhaust gas draft is held substantially constant and the exhaust duct temperature is kept below a critical temperature by providin... | 07/11/1989 |
| 4779795 | Convector room heater incorporating a hot water boiler According to the present invention there is provided a boiler comprising a firebox, a control device controlling the flow of air into the firebox, a water jacket surrounding at least part of the firebox, a sensor to sense the temperature of the water in o... | 10/25/1988 |
| 4664096 | Oil and gas water heater An oil and gas fueled hot water heater system having improved efficiency and performance embodies air and fuel regulator valves, water and air supply jackets, cold and hot water insulating check valves, and flow directors and restrictors for the hot combu... | 05/12/1987 |
| 4549525 | Oil and gas water heater A heater system having improved efficiency and performance embodies air and fuel regulator valves, water and air supply jackets, and flow directors for the hot combustion gas generated by the heater burner which gas passes through a central flue in a wate... | 10/29/1985 |
| 4509499 | Energy efficient damper for a furnace A damper for sealing and unsealing a vertical furnace exhaust flue pipe to minimize the escape of heat when the furnace is not operating is disclosed. The damper comprises a cylindrical body adapted to form a section of vertical flue pipe having inner and... | 04/09/1985 |
| 4487137 | Auxiliary exhaust system An auxiliary exhaust system for use with a flue includes a conduit communicating at one end with an opening formed in the flue wall and a blower operable to introduce auxiliary air into the flue through the conduit. The conduit is angled so that the auxil... | 12/11/1984 |
| 4460121 | Thermally controlled vent damper A thermally operated vent damper wherein a flue pipe (12) mounts an eliptical damper plate (38) for rotation about a hollow rod (30). A slot (42) is formed in the damper plate (38) by bending a flange (44) perpendicular to the plane of the damper plate (3... | 07/17/1984 |
| 4452184 | Boiler draft control device In order to protect a boiler against overheating a boiler draft control device comprises a safety thermostat in addition to the regular control thermostat. The control thermostat is provided with a supporting tube in order to limit its length reduction in... | 06/05/1984 |
| 4449512 | Energy efficient damper for a furnace A damper for sealing and unsealing a vertical furnace flue pipe to minimize the escape of heat when the furnace is not operating, the damper comprising a cylindrical body adapted to form a section of vertical flue pipe, the cylindrical body having a top o... | 05/22/1984 |
| 4443181 | Draft control system A draft control system for furnaces comprises an auxiliary channel in communication both with ambient air and the flue of the furnace, a main draft control means for regulating the entrance of ambient, auxiliary draft air into the flue, and auxiliary draf... | 04/17/1984 |
| 4437454 | Mechanical draft controller with vent damper A mechanical draft controller integrated in the draft hood of a furnace and coupled to a flue damper is responsive to the draft in the flue for controlling exhaust stack heat loss and eliminating heated room air loss via the draft hood under normal operat... | 03/20/1984 |
| 4422440 | Automatic draft controller A draft control plate, which automatically opens or closes to provide efficient draft conditions in a furnace, is provided with both horizontal and vertical counterbalance devices which respectively permit adjustment of the initial position of the plate a... | 12/27/1983 |
| 4403599 | Spillage damper for a combustion system An apparatus is disclosed for use in venting the products of combustion from a power combustion system such as an induced draft furnace. The apparatus includes a housing having three openings and a baffle. One opening in the housing receives the gaseous p... | 09/13/1983 |
| 4384672 | Draft limiting device A draft limiting device for controlling the draft in a flue gas passage, includes a flap which is supported on a swing shaft in a secondary air inlet for swiveling movement between a closed position, at which the flap extends in a substantially vertical p... | 05/24/1983 |
| 4341344 | Automatic draft controller A draft control plate, which automatically opens or closes to provide efficient draft conditions in a furnace, is provided with both horizontal and vertical counterbalance devices which respectively permit adjustment of the initial position of the plate a... | 07/27/1982 |
| 4329967 | Adjustable flue control for furnaces A damper type control for furnace flues which opens with commencement of oil burner operation and closes when combustion ceases. The damper is operated solely by the presence of draft created by the oil burner blower, and closes in the absence of such dra... | 05/18/1982 |
| 4301785 | Adjustable flue control for furnaces A damper type control for furnace flues which opens with commencement of oil burner operation and closes when combustion ceases. The damper is operated solely by the presence of draft created by the oil burner blower, and closes in the absence of such dra... | 11/24/1981 |
| 4276871 | Flue damper and draft regulator A flue damper and draft regulator for a furnace in which the orientation of the damper is controlled by a vane. One face of the vane is subject to external atmospheric pressure. The other face of the vane is subject to the flue pressure both upstream and ... | 07/07/1981 |
| 4270894 | Combination flue and vent damper A housing structure with a single pivoted damper member is provided as a replacement for the draft hood associated respectively with the flue outlet and vent pipe inlet in a gas heater system. The normal flue outlet for the gas system connects to a first ... | 06/02/1981 |
| 4259943 | Fuel economizer A fuel economizer, for mounting in a flue pipe between a furnace and a chimney, having a lateral vane overlying a cutout in the flue pipe and carrying a baffle plate in between ends thereof mounted transversely to the flue pipe to obstruct a portion of th... | 04/07/1981 |
| 4088113 | Wood burning automatic swimming pool heater A swimming pool heater has a fire chamber with a fuel feeding opening closable by a door which is removable to use the heater as a fireplace. A heat exchanger comprises a continuous length of copper tubing paralleled by an adjustable bypass. Air is suppli... | 05/09/1978 |
| 4059061 | Waste burner overfire draft system An overfire draft system for a waste burner is disclosed. Such system comprises air vents arranged circumferentially around the base of the burner for communicating the interior of the burner to the atmosphere and a draft modulated damper plate located in... | 11/22/1977 |
| 3987785 | Energy saving device The device is a baffle array that is housed in a section of pipe that coupled from an oil burner to a chimney. The baffle array, when closed, blocks about 70 percent of the pipe cross-sectional area and opens upon the occurrence of a small explosion when ... | 10/26/1976 |
| 3957001 | Furnace implosion door Damage due to implosions occurring within the furnace chambers of balance draft vapor generators is prevented by the provision in the downstream combustion gas duct of one or more openings that are closed during normal operation by doors which are automat... | 05/18/1976 |
| 3951335 | Oven stack action control An oven having an air inlet opening in its lower region and an exhaust opening in its upper region, and at least one gas-fueled burner within the oven, one of the openings containing a baffle variably movable into and out of closing relation to the openin... | 04/20/1976 |
| 3941067 | Barometric draft regulator An improved automatic draft regulator having significantly fewer parts than previous such devices, and comprising a frame adapted to fit into the flue pipe of a furnace, a gate pivotally mounted in the frame, and adjustable weight means pivotally connecte... | 03/02/1976 |
