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| Number | Title | Issue Date |
| 7682231 | Exhaust fan assembly An exhaust fan assembly is provided for expelling contaminated air from a building. The assembly includes a plenum, a fan assembly attached to the plenum, and a windband mounted on top of the fan assembly. The fan assembly is constructed of cylindrical outer and inn... | 03/23/2010 |
| 7547249 | Exhaust fan assembly having H-out nozzle An exhaust system for expelling air from a building includes an outlet nozzle that improves entrainment of ambient air with the building exhaust air. The improved air entrainment results in increased exhaust air dilution and plume height to better disperse the exhau... | 06/16/2009 |
| 7320636 | Exhaust fan assembly having flexible coupling An exhaust assembly is provided for expelling contaminated air from a building. The assembly includes a plenum, a fan assembly attached to the plenum, and a windband mounted on top of the fan assembly. The fan assembly is constructed of cylindrical outer and inner w... | 01/22/2008 |
| 7305895 | Bernoulli mushroom inlet housing for efficient air sampling A collection apparatus is provided for receiving a portion of a medium that flows around the apparatus and directing the portion into a collector. The apparatus includes an axisymmetric streamline receiver and a support member. The streamline receiver includes a cha... | 12/11/2007 |
| 7111521 | Sampling system for moving fluid A system for sampling a moving fluid utilizes a housing in the shape of an airfoil having a leading edge adapted to be disposed in the moving fluid such that the moving fluid will initially encounter the leading edge. A fluid flow pathway extends through the airfoil... | 09/26/2006 |
| 7083384 | Doppler radar sensing system for monitoring turbine generator components The invention provides a sensing system and a method for monitoring the damage to turbine components in a turbine generator. The sensing system comprises an electromagnetic wave generator that generates an electromagnetic wave; a transmitter that transmits the gener... | 08/01/2006 |
| 7077739 | High velocity and high dilution exhaust system The high velocity and high dilution exhaust system uses a centrifugal fan provided with a tapered nozzle. The nozzle compresses the airstream exiting the fan to increase back pressure and velocity. The air flow from the fan enters a stack having a venturi further in... | 07/18/2006 |
| 7018287 | High velocity and high dilution exhaust system The high velocity and high dilution exhaust system uses a centrifugal fan provided with a tapered nozzle. The nozzle compresses the airstream exiting the fan to increase back pressure and velocity. The air flow from the fan enters a stack having a venturi further in... | 03/28/2006 |
| 6951147 | Optimizing rotary impact collectors The present invention relates to optimizing the configuration of rotary impact collectors and devices in which such rotary impact collectors are employed. Rotary impact collectors are formed out of base plate upon which a plurality of vanes are mounted. One aspect o... | 10/04/2005 |
| 6935841 | Fan assembly A fan assembly includes a vertical axis wind turbine (VAWT) which is coupled to an air extraction or air supply fan. The VAWT is located above and is coupled coaxially to the fan. The fan assembly also includes an auxiliary turbine to provide start-up torque to init... | 08/30/2005 |
| 6911340 | Method and means for composting organic material by natural draft A method and means for drawing air through material by natural draft wherein air is drawn into one end of a container having the material therein and is sucked from the other end thereof by a wind powered rotary turbine ventilator. ... | 06/28/2005 |
| 6450874 | Thermostatically controlled power draft motor cooling system A variable speed power flue ventilator with a thermostatically controlled motor cooling system. The thermostatically controlled cooling system employs an auxiliary motor cooling fan separate from the fan used by the power ventilator to extract exhaust gas... | 09/17/2002 |
| 6431974 | Acoustic wind band An apparatus, system and method for improving air entrainment and sound attenuation of gases being discharged from one or more outlet portions of an exhausting device using an acoustic wind band. The acoustical wind band helps improve entrainment of ambie... | 08/13/2002 |
| 6306030 | Solar-powered ventilation system for a building structure A solar-powered ventilation system for a building structure for ventilating building structures even during no wind days. The solar-powered ventilation system for a building structure includes a building structure having a roof and a conduit member extend... | 10/23/2001 |
| 6302778 | Turbine roof ventilator A turbine roof ventilator includes a rotatable shaft defining an upper end and a lower end. A turbine hood is located on the upper end of the shaft and is adapted to turn with the shaft. A cylindrical sleeve is disposed below the turbine hood. The shaft i... | 10/16/2001 |
| 5993309 | Chimney fan A chimney exhaust system for facilitating or creating an upward draft in a chimney flue, operating on what is referred to as "Bernoulli's Principle" comprises a housing unit having a tubular cross member and a tubular depending member, both members having... | 11/30/1999 |
| 5860858 | Air duct booster fan and control device therefor An airflow booster fan and control device therefor, the booster fan, preferably of the centrifugal, axial flow type, adapted for in-line installation into a length of duct or at the remotely located end of the duct in an air transfer duct system. The duct... | 01/19/1999 |
| 5855510 | System for exhausting smoke and controlling fires within a building A system for exhausting smoke from a building. The building has a roof, exterior walls and at least one room therein where smoke has accumulated. The system comprises an actuable compressor arranged to draw smokeless air from the atmosphere outside the bu... | 01/05/1999 |
| 5669811 | Modular devices for the extraction of fumes A smoke extraction apparatus consists essentially in a structural shape of a type of a molding plane given to the exterior wall of the footing (2), which forms the common base element of the static module and of the dynamic module. The dynamic module can ... | 09/23/1997 |
| 5609522 | Combination damper and chimney cap apparatus A combination damper and chimney cap apparatus is provided to ventilate a fireplace and a flue connected thereto to provide a draft through the flue. The apparatus includes a platform constructed and arranged to be removably mounted to the flue and formed... | 03/11/1997 |
| 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 electro-mechanically open and close the damper and set the fan. Wh... | 09/17/1996 |
| 5425413 | Method to hinder the formation and to break-up overhead atmospheric inversions, enhance ground level air circulation and improve urban air quality Disclosed is a method for hindering the formation and for penetrating and breaking-up overhead atmospheric inversions, enhancing ground level air circulation and, improving urban air quality and transporting ozone to the upper atmospheres by the use of wa... | 06/20/1995 |
| 5375651 | Draft inducer blower motor mounting and cooling construction A draft inducer blower motor mounting and cooling construction comprising an electric motor including a housing having openings therein and a rotor mounted on a shaft, a fan blade fixed on the shaft and interposed between the motor and the draft inducer b... | 12/27/1994 |
| 5070772 | Venter A draft inducer having a pair of arcuate semi-scrolls within a cylindrical housing defined by a circular inner end plate and a circular outer end plate vertically spaced by a sidewall. A metal conduit element is connected concentrically to the inner end p... | 12/10/1991 |
| 5012793 | Power vented direct vent system A power vented direct vent system for a fuel-burning appliance wherein a power venter is associated with a vent pipe to create adequate draft for combustion. Outside air is supplied to the appliance for combustion and also communicates through a regulator... | 05/07/1991 |
| 4757802 | Power venter A power venter for connection to an appliance vent system to provide draft and gas flow and which has components mounted exteriorly of a building wall and components extending through the wall, with the latter components including an inner pipe connectabl... | 07/19/1988 |
| 4462305 | Static, dynamic and mechanical aspirator for a gaseous fluid An aspirating device for the ejection of gases or fumes has dynamic primary and static secondary extraction means. The static secondary means has lower and upper elements configured in pseudo-frustoconical forms. The upper and lower elements are rigidly f... | 07/31/1984 |
| 4342258 | Ventilator A ventilator for use on a conduit having an upwardly open mouth has a generally toroidal annular flow body surrounding the conduit immediately below the mouth thereof. This body has an outer wall having an outwardly convex lower portion spaced outwardly f... | 08/03/1982 |
| 4200035 | Modular ventilating assembly A ventilating assembly is formed of three basic modules, namely a base unit constituted as a static ventilator, a turbine unit constituted as a wind-operated ventilator, and a drive unit which can operate the turbine unit as a motor-driven ventilator. The... | 04/29/1980 |
