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7699237 |
Method for controlling the exhaust flow from a cooking chamber of a baking oven
A baking oven and a method for controlling the exhaust flow from a cooking chamber of the baking oven, the flow being discharged by a fan. The method includes increasing a speed of the fan during a...
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7003377 |
Controlling cooling air intake for air cooled equipment
A method and apparatus for supplying cooling air to electronic equipment from ones of at least two sources. A detector detects whether the quality, such as the temperature of the cooling air from a...
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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...
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6681761 |
Exhaust damper system for asphalt heating device
A device is shown for transporting asphalt repair materials for use in repairing potholes in asphalt pavements. The device has a body with a hopper compartment for transporting and dispensing...
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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...
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6213117 |
Motorized insulated damper assembly for furnace systems
A damper unit is provided that is adapted to be positioned in a furnace duct line. The damper unit has a housing which is in communication with a fresh air source and a furnace system. The housing...
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5911217 |
Internally mounted flue damper with exterior free-standing damper drive
This invention provides a water heater including a water storage tank, a flue, a jacket around the tank and the flue and having a top end, a top cover which extends over the tank and the flue and...
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5709173 |
Method and apparatus for controlling combustion air in a boiler plant
A method for controlling combustion air in a boiler plant, where combustion air is supplied into a boiler located in a boiler building, comprises the steps of determining a ratio of air flow inside...
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5695116 |
Thermally activated vent damper
A thermally activated vent damper assembly for occluding passage of gases in a passageway such as a flue. The assembly includes first and second damper members which are pivotable about a common...
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5555876 |
Chimney safety and control system
A chimney safety and control system includes a control panel which indicates the position of the chimney damper and the operational status of a chimney fan unit, and allows the operator to...
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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...
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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...
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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...
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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...
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5039006 |
Home heating system draft controller
A forced air heating system having a dedicated supply duct for delivering heated air to the heated portions of the building and having an open air return system which uses the rooms, hallways, door...
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4979672 |
Shape memory actuator
A shape memory actuator for controlling the position of a control member, such as a damper plate in a duct, the actuator including first and second shape memory elements each having an austenite...
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4942348 |
Electronic air register controller
A self-contained electronic air register controller can easily be mounted directly onto the outside of an air register. When so mounted, the controller engages the register's actuating lever and...
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4919329 |
Thermally activated automatic damper and damper operator
A damper has a frame with a cross bar and a reciprocal blade. A bimetallic element which moves in response to temperature is coupled to the blade and is hingedly coupled to the cross bar so that...
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4838481 |
Draft control arrangement for venting of combustion apparatus
In a bimetal-actuated damper a loop-shaped bimetal element engages a damper element. One end of the loop is fixedly fastened while the other end of the loop is movably connected with the damper...
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4834282 |
Device for use with flue dampers
A device is provided for controlling the position of a damper within a flue or stack of a forced air heating or cooling system or a commercial or industrial boiler. The device comprises a damper...
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4711626 |
Damper mounting assembly
A housing supporting a signal-controlled, power operating unit for a damper is mounted internally within a duct by a tubular supporting sleeve in an angularly and axially adjusted position...
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4705928 |
Damper drive in microwave heating appliance
A heating appliance such as a hot-air circulating microwave oven using a shape memory alloy as the damper spring for driving the damper unit. The damper lid a capable of switching the direction of...
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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...
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4619602 |
Fail safe automatic flue damper mechanism
The present invention is an electronically controlled, automatically operated flue damper mechanism which is totally fail safe in operation. The mechanism is to be fitted within the draft hood of a...
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4587706 |
Thermally responsive damper assembly having interfitting parts and method
A thermally responsive damper assembly for mounting into a duct which is to be regulated by the damper assembly comprises a damper plate having oppositely disposed notch portions and arm portions...
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4570847 |
Flue damper control system
A control system is provided for controlling a flue damper in a furnace flue. The control system includes a voltage source, a thermostat, a gas valve, and means for moving the flue damper between a...
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4550874 |
Means controlling a flue damper
A flue damper is rotated 360° in a predetermined direction in 90° increments to be selectively opened and closed in 90° increments. The incremental rotation is accomplished by a motor driven ti...
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4538980 |
Positive opening damper for combustion appliance
A normally energized motor maintains a counterbalanced damper closed to block air inflow in a non-combustion condition of an appliance. Deenergization of the motor by thermostat control releases a...
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4529120 |
Heat generating system for multi-purpose usages and recovery of products of combustion
A heat generating system using solid fuel in a water jacketed combustion chamber for supplying hot water to units for space heaters and hot water storage units, and in which control means is...
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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...
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4450344 |
Damper drive system in a combined microwave and electric heater oven
A combined microwave and electric heater oven includes a fan system for cooling a magnetron, and a damper for selectively introducing a forced air flow generated by the fan system into an oven...
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4439139 |
Furnace stack damper control apparatus
A furnace stack damper control apparatus has a motor for connection to a stack damper to open the damper upon a call for heat by a space thermostat. The motor is driven in a closed direction by...
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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...
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4434781 |
Thermally efficient barbecue grill
A barbecue grill unit which includes thermally actuated dampers and insulated walls to conserve heat during its operation. The dampers are of the laminated bimetallic type which progressively open...
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4426993 |
Valve for appliance combustion air inlet
An interior building area containing at least one combustion type heating appliance is equipped with a combustion air inlet having an openable and closable damper operatively associated therewith....
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4421096 |
Vent damper drive
An automatic vent damper control mechanism for use on furnaces or the like having a spring loaded open position and an electric motor which drives it to a closed position, against the spring bias,...
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4416611 |
Flue damper control
This disclosure relates to a flue damper control including an automatic control and a manual override for use in the event of failure of certain parts. The control includes a first lever means...
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4408567 |
Furnace construction
An fuel-fired hot water furnace includes the use of an improved combustion chamber, heat exchanger and breaching damper, and further includes utilizing the water heated in the furnace as the means...
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4406396 |
Method and apparatus for regulating flue draft
Method and apparatus for regulating the flue draft in heating systems including a combustion volume, a flue communicating with the combustion volume, and a vent opening between heated ambient air...
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4403942 |
Self-checking safety switch control circuit
The present invention relates to a self-checking safety switch control circuit for a power combustion system. The circuit comprises a safety switch, a combustion blower relay, a thermal pilot...
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4404613 |
Double switch fuse assembly
A control system for an automatic damper in a heat generation system. The damper is provided with a spring biasing arrangement to open the damper when the plant is generating heat to permit...
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4399940 |
Automatic stove damper control
An automatic stove damper having a temperature responsive element which activates a damper plate, the temperature responsive element being oriented by a movable adjustment means. The device allows...
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4390123 |
Thermally activated, automatic, single blade damper and damper operator
For a single blade damper, an improved damper operator including a bimetallic element, one end of which is attached to the frame of the damper, and the other end of which is pivotally associated...
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4389014 |
Vent damper with emergency manual override
In the event of a malfunction of the unit, the damper plate may be moved to and locked in the open position, to permit the furnace to operate. With the plate locked, the motor would normally run...
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4386731 |
Damper construction for a gas fired combustion apparatus
A thermally controlled damper construction for a gas fired combustion apparatus such as a furnace, water heater or the like, is described. The damper is pivotally mounted within the stack of the...
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RE31256 |
Automatic damper means and controls therefor
An automatic damper means and controls, which provide an exceedingly safe automatic damper for the exhaust duct-work of an associated gas furnace or the like, by automatic control of the damper,...
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4384671 |
Temperature responsive vent damper
A heater vent having a temperature responsive damper such as a bimetallic element is disclosed. A shroud-like structure is positioned to cooperate with the temperature responsive element to close...
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4374569 |
Furnace draft control system with electronic loss-of-draft timer
The system includes a damper plate equipped with a draft controller or sensing switch and a motor for positioning the damper plate to control the furnace draft. Upon generation of a call-for-heat...
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RE31112 |
Automatic flue damper
In the present invention, an automatic flue damper located in the vent stack of a household furnace or other apparatus requiring venting is interfaced with a thermostatic control and a fuel supply...
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4361272 |
Thermal damper for rectangular flue
A thermally responsive damper for operation in a rectangular ventilation duct.
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