Matches 1 - 50 out of 548 1 2 3 4 5 6 7 8 9 10 11 >
Match Document Document Title
7325541 Adjustable primary air supply for wood burning device  
An adjustable primary air supply for wood burning device comprises at least one but preferably two thermostatic bimetal elements which, by bending with temperature variations, directly actuate a...
6546897 Thermodynamically activated flue damper  
The invention is directed to a thermodynamically activated flue damper for a gas water heater that includes a flue damper for controlling the passage of exhaust gases through the flue; and a...
6497230 Air port damper  
An air port damper system for a recovery boiler employs plural louvers for altering the exit angle of air through an air port. Dampers are provided to enable adjustment of the flow through the...
6308701 Combustion system  
A combustion system includes a primary combustion chamber divided into left and right sides by fuel-retaining standards defining a canyon or void extending into a secondary combustion chamber is...
6257155 Curved blade by-pass damper with flow control  
A damper vane assembly for controlling the flow of flue gas between a flue gas pass of a combustion vessel which generates flue gas and a selective catalytic reactor operable to catalytically treat...
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...
6041770 Bi-metallic control device  
A bi-metal control flap for a wood stove is biased to close by gravity and is controlled to open an air inlet when the temperature rises which is opposite to the traditional bi-metal control...
6041767 Baking oven devaporation  
A baking oven comprises at least one hearth with a baking chamber, a heater, a vaporization device for the supply of vapor and/or fresh air, a devaporization device for the discharge of vapor...
6035849 Damper clip extension  
An extension assembly for use with a damper assembly and for extending the damper assembly control shaft. The extension assembly is provided for coupling of a handle to the control shaft and...
6029648 Outside wood-burning furnace  
A natural draft furnace has a firebox inside a water box with fire tubes containing water running through the firebox, flues from the firebox running through the water box, a front/fire door of...
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...
5732692 Vent damper  
An integral vent damper/hood apparatus for regulating draft in a flue of a hot water heater includes a damper support having a hemispherical dome, a congruent cylindrical portion with a plurality...
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...
5398669 Explosion dampener  
An explosion dampener fits with a pressure relief opening in a gas fireplace. The explosion dampener comprises a fireplace mounting bracket, a lever arm pivotally secured to the mounting bracket...
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...
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...
5255665 Power vent blower assembly for gas water heater  
A water heater comprising a tank defining a water chamber, a combustion chamber located beneath the water chamber, a flue extending through the water chamber, having a lower end communicating with...
5195883 Flue gas recirculation system with fresh air purge for burners  
Flue gas is captured from an emissions stack and recirculated to a burner by an induced flue gas recirculation system comprising: a mixing assembly for mixing combustion air and recirculated flue...
4928668 Fireplace damper indicator  
An indicator for a fireplace damper door includes a spiral wire and a contact arm that may engage the wire. The arrangement is such that upon a multiple number of rotations of the contact arm,...
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...
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...
4836184 Method for fuel economy  
There are disclosed means and method for improving the efficiency of combustion in an automatic gas-fired furnace through retardation, without restriction of the exhaust emission of the products of...
4777932 Counterweight static pressure-air flow damper assembly  
A barometric damper includes a swingably mounted damper blade having a first adjustable counterweight assembly lying in a common plane with the damper blade and mounted for rotation therewith. The...
4723533 Combustion air vent with automatic lock  
An air vent for supplying air for combustion to a fireplace or the like inside a building, the vent comprising a duct having an inlet end outside the building and an outlet end inside the building,...
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...
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...
4699121 Fuel saving device  
The invention provides a fuel saving device comprising a flue damper of simple mechanical construction mounted on a support member. A hinge connects the flue damper to the support member allowing...
4691689 One piece adjustable damper  
This invention provides an adjustable damper having a tubular duct section defining first and second diametrically opposed openings and first and second sets of detents formed radially from the...
4646715 Extension apparatus for damper control shaft  
There is disclosed an extension apparatus for a damper assembly having an extension member for effectively extending the damper assembly control shaft and a securing member for securing the...
4643862 Refractory stove damper with catalytic effect  
Disclosed herein is a preferred process for making a catalyst. A catalyst such as is named in the title of this invention. The process begins with the chosing and blending the different...
4637300 Filter assembly for an exhaust stack  
A filter assembly for an exhaust stack having a housing defining an interior chamber and an inlet and an outlet which are connected in series with the exhaust stack. A mounting frame is secured...
4635616 Fireplace  
A fireplace comprising a base adapted to support a fire grate, side walls extending from the base, a passage for the flow of combustion gases from the fire grate and a damper in the passage for...
4550668 Combustor unit for woodburning stove  
A combustor unit for a woodburning stove comprises a generally T-shaped flue assembly interiorly receiving a combustor having a catalyst to facilitate combustion of exhaust gases. The combustor is...
4545308 Apparatus for regulating airflow to a chemical recovery boiler  
A chemical recovery furnace (10) having air nozzles (12) is provided with apparatus (22) for keeping the nozzles clear of combustion product deposits, and also accurately controlling the airflow...
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...
4533439 Apparatus and method of using a fuel gas regulator for a coke oven battery  
Method and apparatus for the regulation of the flow of fuel gas in the fuel gas supply duct of a heating wall of a coke oven to assure uniform heat distribution in the oven are provided. The...
4530346 Mechanical thermostat having proportional control for a solid fuel-burning stove  
A mechanical thermostat for modulating the temperature of a solid fuel-burning stove, including a casing, a thermostat coil mounted in the casing to sense the stove wall plate temperature; a...
4526160 Apparatus for controlling flow of combustion products  
Apparatus for cooperation with an associated flue having a first axis extending away from a point proximate to an associated combustion chamber which includes a funnel shaped member having first...
4512330 Fireplace screen  
A fireplace screen arrangement is disclosed which includes a frame upon which a pair of mesh screen doors are pivotally mounted for movement between closed and open positions with respect to the...
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...
4497310 Flue box with adjustable counterbalance cap  
There is disclosed an improved flue box assembly for use in conjunction with a heating plant, the flue box having a housing with an interior diametric opening substantially greater than the exhaust...
4484562 Flexible disk damper  
A flexible disk damper which is capable of providing tight seals for a large diameter opening over a wide range of temperatures. Disks are made sufficiently flexible to compensate for inherent...
4479483 Safety stovepipe damper assembly  
A safety stovepipe damper assembly designed for use with a conventional type stovepipe and damper as used on coal, wood, or waste burning stoves. Provisions are made for presetting the damper to a...
4477248 Oil burner shutter  
An oil burner shutter to block off an oil burner from a wood/coal boiler when not in use having a movable shutter with an aperture therein and means to move said shutter to an open or closed...
4476852 Add-on catalytic damper assembly  
An add-on catalytic damper assembly is provided which is adapted to be positioned between the flue outlet pipe of a wood burning stove and the chimney pipe, and which provides catalytic combustion...
4473212 Blast gate  
A wafer damper assembly formed of a thin, flat, polymeric annulus with a central opening receiving a polymeric wafer baffle. The baffle has a non-circular transverse passage receiving a cooperative...
4471755 Fireplace structure  
A fireplace having one or more conduits for directing outside combustion air into the firebox with a movable member adjacent a conduit outlet for normally closing said conduit and having either...
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...
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...
4441653 Bi-metallic vane vent damper  
A thermally actuated damper for insertion in the flue pipe of furnaces consists of a cylindrical section of pipe having a diametrically extending bar fixed across its interior. The bar supports a...
Matches 1 - 50 out of 548 1 2 3 4 5 6 7 8 9 10 11 >