|
Match
|
Document |
Document Title |
|
|
8157560 |
Heater
A heater including a heat dump opening and a heat dump cover moveable between an open and a closed position to selectively block flow of fluid through the heat dump opening. The heat dump opening...
|
|
|
8113823 |
Apparatus and method for controlling a damper in a gas-fired appliance
A damper mechanism for a gas-fired appliance is disclosed. The damper mechanism is mechanically operated in response to changes in pressure within a portion of the appliance. Changes in gas...
|
|
|
8070481 |
Combustion blower control for modulating furnace
A furnace includes a combustion blower and one or more pressure switches. In some cases, the one or more pressure switches may be used to calculate one or more operating points for the combustion...
|
|
|
7985066 |
Combustion blower control for modulating furnace
A furnace includes a combustion blower and one or more pressure switches. In some cases, the one or more pressure switches may be used to calculate one or more operating points for the combustion...
|
|
|
7950919 |
Method and apparatus for monitoring and controlling the stability of a burner of a fired heater
The invention includes method and apparatus for controlling the stability of a burner, preferably a low NOx burner, of a natural draft heater. The method includes measuring the draft over a time...
|
|
|
7717702 |
Direct sidewall vent system
A direct sidewall vent system between a fuel-burning appliance in a first space and an external atmosphere, through a wall between the first space and external atmosphere. The direct sidewall vent...
|
|
|
7101172 |
Apparatus and methods for variable furnace control
A furnace control system for controlling a gas-fired induced-draft furnace having a variable speed inducer blower. A control apparatus, responsive to a signal corresponding to the magnitude of a...
|
|
|
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...
|
|
|
6758208 |
Flexible gas-fired heat exchanger system
A compact, highly flexible and efficient, multi-positionable, multi-dimensional and multi-stage gas-fired heat exchanger system as described. The system is connectable in a forced air duct...
|
|
|
6644957 |
Damper control device
A device for controlling a damper in an appliance is disclosed comprising a motor having a rotatable shaft extending therefrom which is operatively connected to a plate of the damper, a control...
|
|
|
6543438 |
Furnace with dual use inducer motor
An improved furnace including a two-speed inducer motor which can be used as a single speed motor for either a vertically or horizontally vented furnaces. The inducer has a common terminal, a low...
|
|
|
6439877 |
Control device for a gas-fired appliance
A device for controlling a gas-fired appliance is provided. The device includes a motor assembly having a shaft extending therefrom and a cam coupled to the shaft for rotation therewith. The cam is...
|
|
|
6401708 |
Pressure sensing device in gas furnace and method for controlling operation thereof
Pressure sensing device in a gas furnace including a first tube in communication with a position of an air supply pipe on an inlet side of an air supply fan having a pressure identical to an inlet...
|
|
|
6390806 |
Pneumatic system for flame rollout and draft safeguard protection
A furnace is provided with a flame rollout protection system which operates through an existing excess-air control pneumatic circuitry to shut down the furnace in the event of a flame rollout...
|
|
|
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...
|
|
|
6234164 |
Intake and discharge tube closure detector for combustion device of forced intake and discharge type
An orifice is disposed in an intake tube for developing a pressure difference across the orifice, i.e., portions of the intake tube which are positioned upstream and downstream of the orifice. An...
|
|
|
5993195 |
Combustion air regulating apparatus for use with induced draft furnaces
A combustion air regulating apparatus which is adapted for use with two stage induced draft furnaces and which allows such furnaces to be used with low cost AC inducer motors of the type having one...
|
|
|
5902098 |
Method for controlling an ignition for a gas boiler
A method for controlling an igniting operation for a gas boiler for preventing an explosive ignition is disclosed. The gas boiler is equipped with a burner for burning a gas, a fan for exhausting a...
|
|
|
5882185 |
Apparatus for detecting a head wind in a gas boiler and method thereof
An apparatus for detecting a head wind in a gas boiler and method is disclosed which is capable of the magnitude of variation of voltage corresponding to the R.P.M. of an exhaust fan and the...
|
|
|
5878741 |
Differential pressure modulated gas valve for single stage combustion control
An apparatus senses the pressure changes in a collector box or relief box of a furnace due to changing wind conditions, and adjusts the gas flow accordingly. The apparatus controls the main gas...
|
|
|
5860411 |
Modulating gas valve furnace control method
A furnace control apparatus is described wherein a flow of gas into a burner assembly is directly dependent on an indicia of burner combustion air airflow, such as heat exchanger pressure drop....
|
|
|
5819721 |
Flow control system
A control system for regulating a flow rate of a heat transfer fluid in a heat transfer system, the heat transfer system having a heat transfer fluid flow path, flow control device for creating...
|
|
|
5795148 |
Induced draft furnace air addition method and apparatus
Method and apparatus for maintaining even heat distribution to each of the tubes contained in a down-fired induced draft furnace by eliminating external atmosphere disturbances such as wind from...
|
|
|
5791332 |
Variable speed inducer motor control method
The present invention is a method and apparatus for controlling the flow of combustion air and/or combustion products through a furnace which may experience changing flow restrictions. The method...
|
|
|
5575274 |
Gas log fireplace system
A gas-fired, simulated log fireplace insert incorporating an automatic flue damper for controlling the operational state of a chimney vent (open/closed) in response to gas combustion, an externally...
|
|
|
5456597 |
Intelligen transient eliminator for an ignition system
The present invention relates to an intelligent transient eliminator which allows a gas ignition system to prevent gas valves from being turned off by a pressure switch in response to a transient...
|
|
|
5395230 |
High ratio modulation combustion system and method of operation
A combustion system is shown having a combustion chamber into which fuel is introduced and ignited in the presence of air to create products of combustion which are routed through an exhaust vent....
|
|
|
5393221 |
Heat-activated flue damper actuator
A heat activated flue damper actuator employing an assembly of shape memory alloy springs with linkages to a conventionally designed contemporary flue damper. The combination of the spring...
|
|
|
5363025 |
Actuator employing unidirectional motor for bidirectional rotational positioning
An actuator employing a unidirectional electric motor driving a first rotating member connected to a second rotating member through a pivotable link of which a first end is connected to the first...
|
|
|
5347981 |
Pilot pressure switch and method for controlling the operation of a furnace
A pilot pressure switch for a furnace detects the fluid pressure within the pilot line for a pilot flame, and upon the fluid pressure in the pilot line exceeding a predetermined value, an...
|
|
|
5310335 |
Trim system for fuel combustion systems
A method and apparatus for applying exhaust gas analysis to simple combustion control systems wherein the fuel flow and air flow control devices are interconnected with fixed mechanical linkage, or...
|
|
|
5292063 |
Damper actuator
A stack damper control apparatus for positioning a stack damper and controlling a fuel source in response to closing of a temperature sensitive switch. Limit switches comprising drop cams are...
|
|
|
5257574 |
Coffee bean roasting device
A coffee bean roasting device for roasting coffee beans by applying hot air to the coffee beans. The coffee bean roasting device includes a detector for detecting a factor exerting influence upon...
|
|
|
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...
|
|
|
5222888 |
Advanced proof-of-rotation switch
A HVAC system (10) employs a gas valve (20) to supply gas for combustion within a heating portion (12) of the system. An exhaust (22) removes combustion products using a motor (28) driven exhaust...
|
|
|
5199385 |
Through the wall vented water heater
The present invention provides a water heater capable of exhausting flue gases from an interior space of a building to an exterior space and is adapted for installation through an upstanding wall....
|
|
|
5169301 |
Control system for gas fired heating apparatus using radiant heat sense
A control system for a gas fired, direct ignition, induced draft furnace includes a radiant heat sensing switch responsive to a hot surface igniter and burner flame, a single-pole, double-throw...
|
|
|
5158446 |
Combination pressure and temperature limit control for a fuel-fired, forced draft heating appliance combustion product exhaust system
A fuel-fired, forced draft heating appliance includes a draft inducer fan having an inlet connected to a vent hood, an outlet connectable to a vent pipe, and an interior housing region in which a...
|
|
|
5141152 |
Flue gas closure system
A flue gas closure system for a furnace which includes a burner and a heat exchanger through which flue gas flows. The system includes a closure member which in an open position permits the flow of...
|
|
|
5137056 |
Air flapper valve assembly
The present invention relates generally to pulse combustion furnaces, and more particularly to an improved air flapper valve assembly for use in association therewith, such improved air flapper...
|
|
|
5040943 |
Furnace blower housing and mounting bracket
An exhaust fan blower is provided for use in induced draft furnaces. An integrally molded fan housing and exhaust conduit is provided of a material impervious to the corrosive effects of exhaust...
|
|
|
5027789 |
Fan control arrangement for a two stage furnace
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...
|
|
|
4951651 |
Vent overpressurization detection system for a fuel-fired, induced draft furnace
In an inducted draft, fuel-fired furnace a flow restriction in the external exhaust flue is detected, and the furnace burners responsively deactivated, by a thermal sensing switch mounted in a...
|
|
|
4907737 |
Electronic control system for a gas-fired/hot air furnace with induced draft blower
Electronic control system for a gas-fired/hot air furnace includes a primary control unit which controls the flow of fuel to the furnace. The furnace has heating and cooling space thermostats and a...
|
|
|
4891004 |
Control of energy use in a furnace
A microprocessor control determines, in the course of initiating a heating cycle, whether the blower is operating in the continuous mode, and if it is, the control prompts the blower to be turned...
|
|
|
4880376 |
Method and apparatus for monitoring and calibrating damper position
Damper position of a damper in a heating system is monitored. The damper is movable between end positions in response to movement of a motor shaft. The motor shaft moves in response to a movement...
|
|
|
4856982 |
Apparatus for exhausting combustion gases from a gas water heater
The present invention includes an exhaust fan for exhausting combustion gases from a gas fired water heater, a gas pressure diaphragm switch for operating the exhaust fan in response to fuel...
|
|
|
4850852 |
Gas valve shut off method and apparatus
Provision is made for sensing when the gas valve relay contacts are welded, or stuck, in the closed position and for responsively turning off the inducer motor when that occurs. This in turn causes...
|
|
|
4846400 |
Method of and apparatus for automatic damper control
A method of and apparatus for automatic flue damper control of a solid fuel burning stove has a driveshaft connected to the damper, a plurality of cams on the driveshaft, a plurality of...
|
|
|
4842510 |
Integrated furnace control having ignition and pressure switch diagnostics
An integrated electronic control arrangement is disclosed in the illustrative environment of burner such as in a gas-fired furnace. The control incorporates a self-test feature which shuts down the...
|