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6772753 |
Adjustable orifice plate for exhaust ducts
An exhaust duct orifice adjustment device for a gas-fired heater used to indirectly heat an oven communicating with a heat exchanger, wherein the exhaust duct includes a fixed annular orifice plate...
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6606986 |
Barbeque grill with retractable ventilation system
A barbeque grill including a lower housing, heating means and food support means positioned within the lower housing, an upper housing or hood adapted to enclose the lower housing, a smoke exhaust...
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6508246 |
Mechanical draft controller
The present invention is a mechanical draft controller. The draft controller is comprised of a draft controller portion, a means for pivoting the controller portion, and a means for...
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5503550 |
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...
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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...
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4803931 |
Flue restrictor
A flue restrictor to control air flow in a combustion apparatus having an exhaust system that includes a flue. The restrictor has a housing to be attached in the flue. There is a first valve member...
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4750433 |
In-line power venter
An in-line power venter insertable into a vent pipe and having a housing attachable to the vent pipe. The housing has separate negative and positive pressure chambers provided by a separator plate...
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RE32671 |
Flue control device
A flue control device for slowing the rate at which heated exhaust gases rise through an exhaust stack comprises a cylindrical housing enclosed by end caps, with an offset inlet and outlet being...
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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...
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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...
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4681087 |
Woodkiln combustion device
A wood burning device comprising a metal box with a flue, an automatic flue damper, a combustion chamber formed by layers of insulating refractory material, a transparent ceramic glass front, an...
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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...
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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...
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4569110 |
Self tapping duct fitting and method of use
A duct fitting for connecting a branch duct to a main duct including a tubular body having cutting teeth formed on one end thereof for cutting a hole in the main duct by pressing the cutting teeth...
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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...
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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...
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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...
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4499891 |
Flue control device
A flue control device for slowing the rate at which heated exhaust gases rise through an exhaust stack comprises a cylindrical housing enclosed by end caps, with an offset inlet and outlet being...
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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...
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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...
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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...
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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...
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4466421 |
Afterburner for a wood stove
An afterburner for a wood stove for use as a retrofit assembly comprises a rectangular housing having openings in the upper and lower surfaces provided with cylindrical collars for cooperation with...
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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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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...
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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...
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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...
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4416253 |
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...
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4413613 |
Sleeve damper apparatus
A damper device insertable into a slotted duct or flue without cutting completely through the duct, including a sleeve conforming to the duct cross-section and adapted for insertion through the...
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4406277 |
Fireplace stove insert
The present invention is directed to the provision of an improved stove insert for a fireplace opening, having means associated therewith for precisely controlling draft, thereby enabling the stove...
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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...
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4372485 |
Thermally activated, automatic damper and damper operator
For a damper, an improved damper operator including a bimetallic element connected at one end to the frame of the damper, and at the other end to a pivotal linkage which is also pivotally connected...
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4372289 |
Flue box assembly
An improved flue box assembly for use with the exhaust gas conduit of a heating plant is provided having a housing with at least one pivotally mounted damper plate therein. The damper plate is...
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4369718 |
Shut-off system for flue gas conduits or air intake conduits in oil and gas fire systems
An energy-saving closure system is provided for use in preventing needless energy loss. The system employs a pivotal closure adapted to alternately move between the fully open and fully closed...
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4337892 |
Draft control arrangement for vent of combustion apparatus
A draft control arrangement for a heating apparatus. The draft control arrangement includes a vent damper comprised of one element formed of a shape memory material and another element form of a...
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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...
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4291671 |
Apparatus 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...
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4279629 |
Fire prevention filter for chimneys and the like
This invention is concerned with a removable filter to prevent the buildup of Creosote in chimneys which become vulnerable to fires. A hollow enclosure means that is adapted to connect between the...
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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...
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4263890 |
Flue restrictor
A flue restrictor for installation in the flue piping of a heating system to reduce its effective cross sectional area comprises sheet metal inlet and outlet sections having flanges secured...
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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...
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4236668 |
Thermal damper assembly having position controls
A thermal damper assembly mounted to substantially close a flue at room temperature is equipped with thermally responsive coils to move the damper to an open position in response to heat generated...
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4191171 |
Draft hood and damper assembly for fuel fired heating apparatus
A damper assembly for association with the draft hood of a fuel fired heating appliance to control flow of exhaust gases through both the flue tube and the vent pipe. The assembly comprises a pair...
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4136676 |
Flue box assembly
There is disclosed an improved flue box assembly which consists of a housing formed by a continuous sidewall, a top wall and a bottom wall, each of the top wall and bottom wall having an aperture...
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3722499 |
BOLT AND DAMPER CONSTRUCTION
A novel bolt construction is provided that is self-locating and self-locking with respect to a mating portion of a workpiece, particularly a flat-surfaced workpiece such as a plate. The bolt is...
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3168028 |
Damper blade and assembly
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3088425 |
Door operating mechanism
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3007673 |
Heating duct damper
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2841360 |
Valve for fume channels
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2759490 |
Valve device
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