Did You Know...
...that power steering was invented by independent inventor Francis W. Davis? As chief engineer in the 1920s of the truck division of the Pierce Arrow Motor Car Company, he saw how hard it was to steer heavy vehicles. So that he would be able to keep the profits from his future invention, Davis left his job, rented a small engineering shop in Waltham, Mass., and developed a hydraulic power steering system that led to power steering.
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| Number | Title | Issue Date |
| 7258116 | Bottom venting fireplace system A fireplace having a bottom venting arrangement is disclosed. The fireplace includes a firebox having a burner and a combustion chamber. Fumes produced by burning of gas at the burner are pulled into an upper exhaust plenum in the upper portion of the firebox. The u... | 08/21/2007 |
| 6941944 | Fireplace and fireback therefor A fireback for use in domestic open fireplaces and which in use surrounds the fire bed and which extends upwardly to a throat (31) which in use connects with a chimney. The fireback (25) has walls with inner surfaces (26) that slope steadily inw... | 09/13/2005 |
| 6899095 | Device and method for controlling/balancing flow fluid flow-volume rate in flow channels A system and method for controlling flow in filtering systems and for balancing the flow through fluid systems employs flow control devices that minimize suspended matter precipitation. Several embodiments are included. In a first embodiment, a smooth-walled flow co... | 05/31/2005 |
| 6848623 | Method and apparatus for centrally controlling environmental characteristics of multiple air systems The present invention provides a system and single controller for receiving constant and individualized information from a plurality of air control systems. A single controller is capable of controlling and interacting with at least two separate air control systems ... | 02/01/2005 |
| 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 and a switch having a pressure sensor on opposed sides of the fixed ... | 08/10/2004 |
| 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 |
| 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 asphalt mix materials. A dry, radiant heat source is located in... | 01/27/2004 |
| 6647977 | Termination unit for a coaxial flue pipe A termination unit for a through-the-wall horizontal vent of a gas combustion device having a combustion chamber and a burner, is described. The termination unit comprises a wall mounting plate which is secured to a vertical wall outer surface and about a... | 11/18/2003 |
| 6634352 | Direct venting vent pipe A venting system for a direct vent fireplace or other direct vent appliance to direct combustion gases to an exterior area. The direct venting vent pipe facilitates unrestricted lengths of pipe installations. The vent pipe has a double wall construction f... | 10/21/2003 |
| 6394008 | Splitter plate arrangement for a flue gas stack A splitter plate arrangement is provided for controlling the flow of flue gas in a vertical stack. The splitter plate arrangement 100 is operable to control the flow of flue gas in a vertical stack 128 having an annular entry 130 communicated with two inl... | 05/28/2002 |
| 6318358 | Furnace blower with double sided impeller A blower for a furnace is provided where the blower has an impeller that is configured to create a primary air flow of combustion air into the blower housing and a secondary air flow of cooling air through the blower motor. The primary air flow of combust... | 11/20/2001 |
| 6289886 | Side terminal for direct vent and method of operating same A side terminal for a direct vent operably connected to the outside wall of a structure within which a fireplace is located. The side terminal is configured such that the exhaust duct carrying combustion gases is located a predetermined distance away from... | 09/18/2001 |
| 6237587 | Woodburning fireplace exhaust catalytic cleaner Pollutants in the exhaust from wood burning in a fireplace are removed by positioning reticulated foam between the smoke chamber and the flue. The reticulated foam is a three dimensional latticework of interconnected ligaments forming a porous, open-celle... | 05/29/2001 |
| 6227191 | Method and apparatus for adjusting airflow in draft inducer A bypass hole is cut into a collector box cover to reduce the efficiency of a draft inducer fan when the fan is used with a furnace containing fewer burner-heat exchanger cells than the fan is optimally suited for. Thus the same inducer fan can be used fo... | 05/08/2001 |
| 6213118 | Oven vent tube A vent tube has an open end adapted to communicate with an oven chamber. A catalyst is retained in the vent tube by two sets of abutments. In one embodiment, the abutments are in the form of tabs. The tabs are lanced from the wall of the vent tube and sla... | 04/10/2001 |
| 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 |
| 6112741 | Mid-efficiency furnace with multiple venting option A multi-category gaseous fuel-fired heating apparatus having a combustion chamber, a mixing chamber in fluid communication with the combustion chamber, and an induced draft blower in fluid communication with the mixing chamber whereby combustion air is dr... | 09/05/2000 |
| 6102030 | Furnace vent and intake terminal and blockage safety shut down system A horizontal combined air intake and combustion gas vent terminal assembly is provided having improved wind pressure response and anti-recirculation characteristics. The terminal has a vent conduit disposed inside an air intake conduit. A scoop assembly i... | 08/15/2000 |
| 6083098 | Collective air intake and exhaust chimney A collective air intake and exhaust chimney suitable for outdoor installation which avoids clogging by snow or frost, which comprises an inner flue (8), a heat insulating layer (12), an outer flue (13), an intake passage (10) between the outer flue and th... | 07/04/2000 |
| 6053162 | Balanced flue sealed vent terminal assembly The present invention is directed to a sealed vent terminal assembly intended for use in association with high-efficiency oil fired furnaces or boilers. The terminal assembly of the present invention is designed to simultaneously flow outside combustion a... | 04/25/2000 |
| 6053163 | Stove pipe thermoelectric generator A stovepipe thermoelectric generator. The unit fits in a stovepipe of a coal or wood stove. At least one thermoelectric module is sandwiched between a hot side fin unit with fins extending into the flow of exhaust gases and a cold side fin unit with fins ... | 04/25/2000 |
| 6044835 | Furnace vent and intake terminal and blockage safety shut down system A horizontal combined air intake and combustion gas vent terminal assembly is provided having improved wind pressure response and anti-recirculation characteristics. The terminal has a vent conduit disposed inside an air intake conduit. A scoop assembly i... | 04/04/2000 |
| 6039041 | Methods of fabricating a vent/intake system for a fuel-fired, direct vent heating appliance A sheet metal colinear-to-coaxial duct transition assembly for a fuel-fired, direct vent heating appliance is fabricated by providing a one-piece rectangular sheet metal plenum box having a rear wall with first and second circular openings therein, and an... | 03/21/2000 |
| 6029655 | Modular gas fireplace insert A gas fireplace insert for inserting into existing solid fuel fireplaces is made into modules that are separable for installation and can be later assembled together. A housing module which includes a combustion chamber supports a separable module compris... | 02/29/2000 |
| 6000391 | Positive air flow ventilation system A ventilation system for urging flue gases from an exhaust source through an exhaust conduit has an exhaust outlet for venting the gases and an exhaust inlet communicating with the exhaust source. A blower fan is provided for creating a positive air flow ... | 12/14/1999 |
| 5983885 | Natural draft automatic feed pellet stove A natural draft, gravity feed pellet stove. The body of the stove is formed by a vertical section of large diameter pipe, with an air intake pipe extending from the back of the stove to below a combustion grate. Pellet fuel is discharged onto the grate th... | 11/16/1999 |
| 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 |
| 5947110 | Flue gas flow control The pressure pulsations caused by the flow patterns of flue gases entering a flue gas stack from a horizontal duct are eliminated or reduced by the installation of a partition plate in the stack opposite the inlet duct. This negates the adverse interactio... | 09/07/1999 |
| 5941230 | Appliance for improved venting A gas appliance, flue assembly, or vent adapter including an adjustable flow regulator which regulates the proportions and volume of dilution air and combustion products into the vent is disclosed. The flow regulator can be adjusted to allow a given appli... | 08/24/1999 |
| 5836297 | Cooking exhaust apparatus and method of installing the apparatus The invention aims to achieve a strong low-noise exhaust from a smoke collecting hood disposed right above a gas range on a cooking table through a piping in a ceiling in a high-rise apartment house or a detached house. The cooking table is provided on a ... | 11/17/1998 |
| 5680856 | Discharge structure for closed gas appliances Modular discharge structure for closed gas appliances having an inner end and an outer end, comprising: an outer tubular casing; an inner gas exhaust pipe, being placed inside the casing to define an annular supply line for combustion air therewith; a com... | 10/28/1997 |
| 5669555 | Motor vehicle heating device with exhaust connection piece and baffle plate A motor vehicle heating device with an exhaust connection piece (3) and a baffle plate (9) located near its exit opening. The baffle plate (9) is attached to the exhaust connection piece (3) by means of a spring element (7), preferably by means of hook-sh... | 09/23/1997 |
| 5575273 | Balanced flue outdoor water heater An outside balanced flue water heater including a water tank; a jacket surrounding the water tank; a combustion chamber containing a burner positioned adjacent the water tank; a flue extending from the combustion chamber through an upper portion of the wa... | 11/19/1996 |
| 5551414 | Seal and installation improvements A direct vent gas baseboard heater has field installable concentric air intake tube and exhaust pipe. The intake pipe and exhaust tube can be cut separately from the remainder of the heater, improving the efficiency of installation. They can also be trans... | 09/03/1996 |
| 5460162 | Fireplace ventilation system Apparatus for ventilating a fireplace having a combustion chamber within the interior of a building comprising an enclosure defining an air volume and a fan unit for generating a constant negative pressure region within the enclosure. A venting passage co... | 10/24/1995 |
| 5419307 | Draft hood assembly A draft hood assembly and method are provided for installation of a gas fireplace insert to the flue pipe of a fireplace chimney. The insert is for connection between a gas fireplace insert and a chimney flue pipe, the gas fireplace insert having an expli... | 05/30/1995 |
| 5357940 | Afterburner for grill A smokestack addition to a conventional outdoor type of domestic grill is shown that provides a suction at the outlet from the cooking zone of the grill to pull the products of combustion arising from the operation of the grill which suction of the gasses... | 10/25/1994 |
| 5352099 | Exhaust fan for water heater An exhaust fan assembly for implementation with a hot water tank. The assembly includes a generally elliptical housing having a large end maintaining a fan and a smaller opposite end having an exhaust port. The fan is rotatable about a vertical axis and i... | 10/04/1994 |
| 5341767 | Combustion air inlet diverter plate for a water heater A water heater comprising a tank defining a water chamber, a combustion chamber for heating water in the water chamber, and a combustion air inlet pipe including an outlet end communicating with the combustion chamber. The inlet pipe also includes an inle... | 08/30/1994 |
| 5339797 | Fireplace and method for cooling same A fireplace having a bottom wall, inner top wall, two side walls and rear wall defines a combustion chamber having a front opening. An outer top wall is disposed above the inner top wall. The outer top wall and the inner top wall are disposed in spaced ap... | 08/23/1994 |
