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"Rail travel at high speeds is not possible because passengers, unable to breathe, would die of asphyxia."
Dionysius Lardner, Professor of Natural Philosophy and Astronomy at University College, London ; 1830
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| Number | Title | Issue Date |
| RE40818 | Blower housing with maximized interior spacing A blower for a high efficiency furnace is provided with an increased interior space for accommodating an impeller of maximum practicable diameter. The blower includes a blower motor and a blower housing having a bottom piece and a top piece assembling with the botto... | 07/07/2009 |
| 7278823 | Draft inducer blower A draft inducer blower for high efficiency furnaces, including a blower housing which facilitates maximum air flow efficiency through the blower housing while having an overall radial dimension which conforms to the industry standard arrangement of mounting holes on... | 10/09/2007 |
| 7182574 | Draft inducer blower with fastener retention A draft inducer blower for high efficiency furnaces, including a blower housing having a housing body and housing cover. The housing body includes a plurality of mounting lugs spaced around its outer periphery, through which fasteners are inserted to secure the blow... | 02/27/2007 |
| 7123020 | System and method of fault detection in a warm air furnace A fault detection system and method for a warm air furnace is provided. A sensing circuit connected to an AC power source measures a level of current consumption during several points in the warm air furnace operating sequence. The measured level of current consumpt... | 10/17/2006 |
| 7077739 | High velocity and high dilution exhaust system The high velocity and high dilution exhaust system uses a centrifugal fan provided with a tapered nozzle. The nozzle compresses the airstream exiting the fan to increase back pressure and velocity. The air flow from the fan enters a stack having a venturi further in... | 07/18/2006 |
| 7056204 | Air mover An air mover comprising a motor and a plurality of fan blades coupled to the motor. The motor is operable to rotate the fan blades about a blade axis in order to generate an airflow. A housing is disposed about said fan blades and defines a free area through which t... | 06/06/2006 |
| 7052271 | Draft inducer system A draft inducer system has a voltage reducer capable of converting an input AC voltage to a reduced voltage, and an inducer unit capable of being coupled with the voltage reducer. The voltage reducer includes a reducer housing, a set of prongs extending from the red... | 05/30/2006 |
| 7048537 | Apparatus and method for controlling a variable fuel fired appliance An apparatus is provided for controlling a fuel fired heating appliance, the apparatus comprising a first processor for controlling the ignition operation of the furnace and a second processor for controlling the operation of a variable speed blower motor, wherein t... | 05/23/2006 |
| 7018287 | High velocity and high dilution exhaust system The high velocity and high dilution exhaust system uses a centrifugal fan provided with a tapered nozzle. The nozzle compresses the airstream exiting the fan to increase back pressure and velocity. The air flow from the fan enters a stack having a venturi further in... | 03/28/2006 |
| 6951241 | Method for cooling a motor in a blower assembly for a furnance A method of cooling the bearings of a motor in a motor housing for a furnace assembly is disclosed comprising an aperture in the motor housing whereby air is brought into the motor housing and drawn around the motor via an impeller into the impeller housing thereby ... | 10/04/2005 |
| 6908281 | Blower housing for furnace blower assembly A blower housing for a furnace blower assembly of the type including a blower motor coupled to an impeller for use in expelling exhaust gases from a furnace. The blower housing generally includes an inlet, an impeller cavity, and an extension portion extending from ... | 06/21/2005 |
| 6895874 | Furnace blower housing with integrally formed exhaust transition A furnace blower housing has a two-piece exhaust transition, one piece of which is an integral extension of the blower housing, that transitions a rectangular cross section outlet of the blower housing to a circular cross section outlet of the exhaust transition tha... | 05/24/2005 |
| 6761559 | Gas-exhausting module structure suited for a continuous type oven A gas-exhausting module structure includes a casing having a first open end and a second open end. An air-exhausting channel is defined within the casing. The air-exhausting channel has an upper opening that is lower than the second open end of the casing. A blower ... | 07/13/2004 |
| 6755138 | Ventilation system and method A balanced building ventilation system that employs a fireplace as an element of the ventilation system. The fireplace includes a firebox, and an exhaust gas flue is connected to the firebox for exhausting gas from the firebox to the outdoor ambient. A ventilation c... | 06/29/2004 |
| 6595146 | Furnace blower housing with integrally formed exhaust transition A furnace blower housing has a two-piece exhaust transition, one piece of which is an integral extension of the blower housing, that transitions a rectangular cross section outlet of the blower housing to a circular cross section outlet of the exhaust tra... | 07/22/2003 |
| 6553923 | Blower housing with maximized interior spacing A blower for a high efficiency furnace is provided with an increased interior space for accommodating an impeller of maximum practicable diameter. The blower includes a blower motor and a blower housing having a bottom piece and a top piece assembling wit... | 04/29/2003 |
| 6494152 | Stamped blower housing with 4" transition A blower for a furnace is provided where the blower has a housing with an industry standard 4" diameter exhaust port. The discharge of the blower housing is coupled directly to exhaust piping without the use of transition pieces or expender pieces.... | 12/17/2002 |
| 6494151 | Exhauster diffuser discharge valve A discharge valve plate of the type used in the conduit between an exhauster fan and a riffle box in a coal fine delivery system for a coal-fired combustion chamber in a power plant. The axis of rotation of the discharge valve plate is oriented generally ... | 12/17/2002 |
| 6450874 | Thermostatically controlled power draft motor cooling system A variable speed power flue ventilator with a thermostatically controlled motor cooling system. The thermostatically controlled cooling system employs an auxiliary motor cooling fan separate from the fan used by the power ventilator to extract exhaust gas... | 09/17/2002 |
| 6418882 | Power vented, fuel fired water heater with soft ignition system A power vented, gas fired water heater has a main gas burner disposed within a combustion chamber partially bounded by an arrestor plate having a spaced series of flame quenching combustion air inlet openings therein. To provide for a "soft" ignition of e... | 07/16/2002 |
| 6386123 | Blower housing with maximized interior spacing A blower for a high efficiency furnace is provided with an increased interior space for accommodating an impeller of maximum practicable diameter. The blower includes a blower motor and a blower housing having a bottom piece and a top piece assembling wit... | 05/14/2002 |
| 6314894 | Furnace blower housing with integrally formed exhaust transition A furnace blower housing has a two-piece exhaust transition, one piece of which is an integral extension of the blower housing, that transitions a rectangular cross section outlet of the blower housing to a circular cross section outlet of the exhaust tra... | 11/13/2001 |
| 6276929 | Method for controlling kiln pressure A method for controlling kiln pressure for a shuttle kiln having an exhaust gas fan and an exhaust gas damper in an exhaust gas passage includes the steps of performing a control operation for controlling the number of revolution of the exhaust gas fan to... | 08/21/2001 |
| 6182654 | Woodstove emission controller A woodstove emission controller for conveniently drawing emissions from the wood-stove so that the emissions do not enter the room where the wood-stove is located. The woodstove emission controller includes a tubular member having an inlet end, an outlet ... | 02/06/2001 |
| 6053130 | Power vent water heater with electronic control system A water heater of the invention includes a water container; a combustion chamber adjacent the water container; a burner associated with the combustion chamber; a flue connected to the combustion chamber; a blower assembly positioned to receive combustion ... | 04/25/2000 |
| 5960787 | Gas appliance combustion systems Required blower power in an induced draft combustion system is reduced by recovering pressure from dynamic energy of flow of combustion products. To this end, the outlet duct is diverged gradually, such as an included angle of less than fifteen degrees, a... | 10/05/1999 |
| 5924390 | Water heater with co-located flue inlet and outlet A blower draws air through an inlet duct from outside a building or dwelling and injects air and fuel into a sealed combustion chamber where they are ignited and burned within a ceramic crucible within combustion chamber. The pressurized combustion gases ... | 07/20/1999 |
| 5913273 | Incinerator including vibrator and incinerator including drying chamber A waste incinerator including separate burning-, blower-, chimney- and ash-receiving chambers. A suction-discharge port is provided in a wall between the burning chamber and the chimney chamber for discharging gases from the burning chamber through a chim... | 06/22/1999 |
| 5839374 | Blower for generating static pressure A blower fan assembly for removing combusted by-products and flue gas from a furnace is presented. The blower fan assembly includes a housing with a cavity for receiving a blower fan. The housing is secured over an opening in a furnace so that when the bl... | 11/24/1998 |
| 5806440 | Method for controlling an induced draft fan for use with gas furnaces A gas fired furnace system (10) has a controller (14) controlling the supply of gas through a gas valve (12) and air for combustion by means of an induced air draft fan (28), ignition of the gas by means of ignitor (22), the delivery of heated air from a ... | 09/15/1998 |
| 5720231 | Induced draft fan control for use with gas furnaces A gas fired furnace system (10) has a controller (14) controlling the supply of gas through a gas valve (12) and air for combustion by means of an induced air draft fan (28), ignition of the gas by means of ignitor (22), the delivery of heated air from a ... | 02/24/1998 |
| 5636598 | Induced draft combustion water heater A water heater includes a tank and an exhaust blower is located below the tank and connected to the exhaust line to draw the combustion products by suction through the coil-shaped heat exchanger, through the combustion gases conduit and through the combus... | 06/10/1997 |
| 5623918 | Inducer condensate channel A high efficiency furnace having a heat exchanger and an inducer fan housing attached to the flue gases exit of the heat exchanger to draw flue gases out of the exchanger and force the gases out of the furnace under pressure through a venting system. A co... | 04/29/1997 |
| 5616995 | Systems and methods for controlling a draft inducer for a furnace Systems and methods for controlling a draft inducer for use with a furnace. The draft inducer includes a fan for moving combustion chamber gases for inducing a draft in the furnace combustion chamber that causes a pressure drop across a heat exchanger. Th... | 04/01/1997 |
| 5609522 | Combination damper and chimney cap apparatus A combination damper and chimney cap apparatus is provided to ventilate a fireplace and a flue connected thereto to provide a draft through the flue. The apparatus includes a platform constructed and arranged to be removably mounted to the flue and formed... | 03/11/1997 |
| 5524556 | Induced draft fan control for use with gas furnaces A gas fired furnace system (10) has a controller (14) controlling the supply of gas through a gas valve (12) and air for combustion by means of an induced air draft fan (28), ignition of the gas by means of ignitor (22), the delivery of heated air from a ... | 06/11/1996 |
| 5375651 | Draft inducer blower motor mounting and cooling construction A draft inducer blower motor mounting and cooling construction comprising an electric motor including a housing having openings therein and a rotor mounted on a shaft, a fan blade fixed on the shaft and interposed between the motor and the draft inducer b... | 12/27/1994 |
| 5347958 | Heat recovery apparatus and an improved heat recovery method An apparatus for recovering heat, and a flue gas recovery and/or recirculation and/or induced draft apparatus for boilers. The apparatus for recovering heat may be used in combination with the flue gas recovery and/or recirculation and/or induced draft ap... | 09/20/1994 |
| 5291513 | Method and device for exhausting gases or fumes from a metallurgical container and an electric furnace provided with said exhaust device The inside of the metallurgical container is connected to a fan (105) through an exhaust duct (102). An additional gas is introduced in the intake part of the fan (105) preferably through the duct (102). The additional gas introduction flow is regulated i... | 03/01/1994 |
| 5279234 | Controlled clean-emission biomass gasification heating system/method A biomass fuel gasification chamber, blast tube, and heat exchange chamber are interconnected horizontally and subjected to negative drawing pressure by a large variable speed chimney fan. An auger with an air lock feeds biomass fuel automatically into th... | 01/18/1994 |
