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| Number | Title | Issue Date |
| 8066559 | In-plane airflow circulation contingency and control system The invention eliminates recirculation or back draft associated cooling air flows in systems that use two or more cooling fans/blowers (or other possible cooling devices). The inventive device with accomplish this by mean of an “Iris-like” in-plane device. The s... | 11/29/2011 |
| 7431640 | Self-brushing air moving device An air moving device assembly in a computer system has an air moving device such as a fan or blower within a housing for moving air from an air inlet to an air outlet. A mesh with a plurality of openings covers the air outlet. A back flow damper assembly is position... | 10/07/2008 |
| 7416481 | Blower exhaust backflow damper A system, method, and apparatus for preventing exhaust backflow into a blower are disclosed. Embodiments may include a blower system with an invertible blower chassis having a blower exhaust to direct airflow from the blower chassis at an airflow angle. The system m... | 08/26/2008 |
| 7326108 | Ventilation device In order to provide a simple design of ventilation device which has a relatively open aperture of pleasing aesthetic appearance, there is provided a face 2 for facing into a room, the face including an aperture 3. Three closure parts 5 are provi... | 02/05/2008 |
| 7285147 | Air supply systems and pressure adjustment devices for use therewith An air supply system for a clean room with a critical machine. An intake duct connects the exterior of the clean room to a make-up air unit, and is configured to transport external air into the make-up air unit. A first air duct connects the make-up air unit to an a... | 10/23/2007 |
| 7272949 | Refrigerator and airflow passage for ice making compartment of the same A refrigerator is provided with an airflow passage for an ice making compartment of the refrigerator. In the refrigerator, a main body has an opened side, and a door selectively closes the opened side of the main body. An ice making compartment is formed in the door... | 09/25/2007 |
| 7077742 | Pressure relief valve and method of forming the same A pressure relief valve (10) includes a housing (12) with a peripheral side wall defining at least one central airflow passage and at least one flap valve element (14). The housing (12) and the flap valve element (14) have a molded... | 07/18/2006 |
| 6953320 | Ventilation fan A ventilation fan assembly (10) having a fan (22) mounted in a housing (12) and a shutter assembly (60). The housing has a square inlet portion (12C), a circular center portion (12E) and a conical outlet portion (12D)... | 10/11/2005 |
| 6899516 | Transverse type blowers A blower includes a base having a transverse passage for receiving a motor therein and a fan device driven by the motor extends from a hole in an end of the base. A casing including an outlet is connected to the base and mounted to the fan device. An anti-back devic... | 05/31/2005 |
| 6685557 | Building ventilation air inlet assembly A building ventilation air inlet assembly for providing an adjustable venting assembly to permit automatic inlet of air includes a housing, an air opening extending through the housing, a valve plate pivotally coupled to the housing for selectively coveri... | 02/03/2004 |
| 6616404 | Ventilation fan A ventilation fan assembly (10) having a fan (22) mounted in a housing (12) and a shutter assembly (60). The housing has a square inlet portion (12C), a circular center portion (12E) and a conical outlet portion (12D) having rifling grooves (20). The shou... | 09/09/2003 |
| 6589113 | Vent closure member with lift spacer A ridge vent assembly extends along a roof ridge of a building. One embodiment has corrugated plies defining small diameter passages that communicate a vent opening cut along the ridge of the roof with ambient atmosphere. A moveable valve member extends a... | 07/08/2003 |
| 6533656 | Air handling system duct closure and heat trap A counterweight biased duct vent closure and door for a conventional overhead or surface mounted forced hot/cool air supply vent opening. The closure door includes a covering sized to fit over and sealably cover the register or vent opening from communica... | 03/18/2003 |
| 6475078 | Air ventilating device An air inlet device for use in automatically providing ventilation to the interior of buildings. The device has one of more openings each of which has a moveable louver pivoted at the lower side of the opening with the louver extending upwardly so that th... | 11/05/2002 |
| 6454247 | Anti-backdraft shutter assembly for an axial flow fan An anti-draft shutter assembly for an axial flow fan fitted to a duct. The assembly includes at least one counterbalanced flap supported downstream of airflow from the fan when in operation, and at least one of the flaps being pivotally supported outside ... | 09/24/2002 |
| 6386828 | Ventilation fan A ventilation fan assembly (10) having a fan (22) mounted in a housing (12) and a shutter assembly (60). The housing has a square inlet portion (12C), a circular center portion (12E) and a conical outlet portion (12D) having rifling grooves (20). The shou... | 05/14/2002 |
| 6276895 | Fan with centrifugal shutter mechanism A fan has an associated centrifugal mechanism and a shutter, comprising a plurality of pivoted vanes and a central vane pivotally interconnected with a pair of heavy tie rods. The centrifugal mechanism is driven by the fan propeller and comprises a hermet... | 08/21/2001 |
| 6203423 | Damper flap and duct connector assembly A damper flap and duct connector assembly for controlling air flow through a ventilation system includes a damper flap pivotably mounted to a duct connector. The connector connected to a ventilator has an air flow opening disposed in its center and a cyli... | 03/20/2001 |
| 6183359 | Self opening flexible protective covering for heat registers A cover for use with an air register. The cover includes a base part which extends about the opening through the register and is positioned between the register and the floor. Hinged to the cover base part is a deflector part which extends upwardly over t... | 02/06/2001 |
| 6142213 | Ducted cooling system with radial-flow fan A cooling system for a vehicle having a liquid-cooled engine is provided. The cooing system includes a heat exchanger constructed and arranged to be mounted in spaced relation with respect to the engine for cooling the liquid by air directed from a front ... | 11/07/2000 |
| 5983930 | Air supply valve The invention relates to a throttle device for delivery of a current of gas through a channel (1), the device comprising a flap (4) which is arranged so that it can pivot on an axle (5) and which is designed in such a way that, at a certain pressure force... | 11/16/1999 |
| 5980381 | Air vent systems and methods A vent assembly for controlling flow of air into a room. The vent assembly comprises a housing and a damper member mounted entirely within the housing. The housing is mounted to a surface of the room such that air passing through an air duct pass through ... | 11/09/1999 |
| 5924922 | Method and apparatus for ceiling ventilation A ceiling ventilation inlet includes a housing having an air inlet aperture, an air outlet aperture, and a baffle supported for linear movement adjacent the air outlet aperture. A spring is positioned such that the baffle moves dependant upon air pressure... | 07/20/1999 |
| 5775988 | Method and means for improved sidewall ventilation A ventilation inlet includes a housing having two air inlets apertures, a solid wind-deflecting rear wall, and a baffle supported for pivotal movement about a pivot point. A spring or other biasing mechanism is operatively connected to the baffle. Air ent... | 07/07/1998 |
| 5707283 | Dual baffle system in automatic air inlets for livestock facilities A dual baffle system which can be incorporated into automatic air inlets used in livestock facilities. This system consists of four different components: two baffles, spring, opening mechanisms, and stationary bracket. This baffle system is positioned ins... | 01/13/1998 |
| 5669815 | Barometric damper with magnetic latch A barometric damper has a housing which is adapted to be coupled with a structure. The housing has an opening that allows spatial communication between the interior and the exterior of the structure. The damper also has a damper blade. The damper blade is... | 09/23/1997 |
| 5538074 | Heat exchanger, in particular cooling apparatus In the case of a heat exchanger, in particular a cooling apparatus, having a housing and at least one ventilator for blowing the air which flows through the heat exchanger out through an outlet opening in the housing, there is arranged on the outside of t... | 07/23/1996 |
| 5447470 | Apparatus insuring distribution and automatic control of air supplies, in particular for ventilation of buildings An apparatus for the automatic control of ventilation of premises comprising a flexible flat membrane (11) attached by one of its edges in the interior of the casing (12) on the upper wall between two opposed openings (18) and (19). The upper wall support... | 09/05/1995 |
| 5344363 | Roof vent assembly for grain storage bin A roof vent for a grain bin communicates air flow from within the grain bin to ambient air, especially when air is forced through the bin for the purpose of drying the grain therein. The vent includes a housing with a flap closure member in the shape of a... | 09/06/1994 |
| 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 |
| 5277658 | Barometric damper apparatus Barometric damper apparatus is usable for both horizontal air flow and vertical air flow and thus comprises a universal barometric damper apparatus without a structural change. The barometric damper apparatus includes a plurality of louvers or damper blad... | 01/11/1994 |
| 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 first and second positions accounting for a different flow r... | 11/09/1993 |
| 5236391 | Flush-mounted air intake A corrosion-free, condensation-free, flush-mounted automatic air intake has a rectangular plastic frame insertable into an agricultural building ceiling or wall opening and fastenable thereat. The frame has a flange therearound for mounting and supporting... | 08/17/1993 |
| 5230657 | Air register cover construction A collapsible lightweight cover device (10) for floor registers (100) including a cover member (20) pivotally secured to the register (100) and having accordion folded panel members (30) operatively attached to both the cover member (20) and the register ... | 07/27/1993 |
| 5201685 | Integral air intake apparatus An integrally formed air intake apparatus for regulating air flow into a structure such as a barn. The air intake apparatus includes an elongate convex valve seat to minimize contact between the valve seat and its valve and to permit smooth air flow over ... | 04/13/1993 |
| 5105731 | Blocking of return air A check valve assembly for the ventilation duct to the passenger space of a motor vehicle comprises an outer housing (3), to which is fastened through at least one clamping connection an inner frame (4). Between the outer housing (3) and inner frame (4) t... | 04/21/1992 |
| 5099751 | Control system for doors of a negative air pressure enclosure A decontamination chamber entranceway to an asbestos removal work area includes rigid swinging doors for a rapid escape from the contaminated work area due to an emergency such as a fire or smoke. Also during a power failure it is easy for the workers to ... | 03/31/1992 |
| 5080005 | Passive building vents A passive building vent disposed in an outside vertical building wall, communicates between the outside atmospheric air and the confined air within the building, via a housing forming an air mixing chamber with a passageway disposed therethrough. A movabl... | 01/14/1992 |
| 5058492 | Insulated diffuser for evaporative air cooling system A device which permits rapid conversion of an air diffuser in an evaporative air conditioning system during periods of use, to an insulative dampening member during periods of non-use. The device attaches to the opening of outlet air duct of the cooling s... | 10/22/1991 |
| 5029810 | High performance damper blade and damper seal combination A high performance damper blade and damper blade seal combination including a damper blade having a planar portion perpendicular to the damper blade and a damper blade seal including a base and two upwardly extending legs. One leg of the damper blade seal... | 07/09/1991 |
