Abstract: The invention concerns a housing of a fan with an external covering, wherein the housing comprises a housing body to accommodate fan components, and a radial exterior face of the housing body is surrounded by the external covering in the circumferential direction over its full surface, so that a radial exterior surface of the housing is formed by an exterior surface of the external covering, and the external covering is detachably fastened to the housing body.

Abstract: A system and method for creating substantially continuous circulation within a volume to be managed comprising at least two ductless devices including three exit zones, and a method for designing a system for increasing internal air turns in a volume of air to be managed within a facility, comprising determining locations of existing heating, ventilation, and air conditioning (HVAC) system components, determining preferred locations of the at least two ductless devices, and continuously moving air through the at least two ductless devices.

Abstract: A backflow prevention device includes at least one backflow prevention unit. The backflow prevention unit includes a frame, a first edge shutter plate, a second edge shutter plate and plural intermediate shutter plates. The frame includes an airflow channel. If the first inner sidewall is disposed over the second inner sidewall, the first edge shutter plate and the plural intermediate shutter plates are configured to open or close the airflow channel, and the slab of the second edge shutter plate is inactive. Whereas, if the second inner sidewall is disposed over the first inner sidewall, the second edge shutter plate and the plural intermediate shutter plates are configured to open or close the airflow channel, and the slab of the first edge shutter plate is inactive.

Abstract: A method for installation of an adhesive vent over an aperture in a surface is described, the adhesive vent has at least one substantially straight serrated edge and an air permeable venting region, an adhesive region having adhesive disposed thereon surrounding the air permeable venting region. The method comprises providing an edge guide adjacent to the aperture, the edge guide adapted to inhibit motion in at least one direction on the surface, positioning the serrated edge on the surface such that the edge of the adhesive vent engages with the edge guide and pressing the adhesive vent onto the surface such that the air permeable region of the adhesive vent covers the aperture and the adhesive vent is fixed to the surface by the adhesive.

Abstract: A control system for an HVAC system serving at least two zones, each zone receiving conditioned air by way of a zone duct, each zone duct including a zone damper having a first portion and second portion controlled by a actuator to move between an open and a closed position in response to a zone thermostat, a second portion responsive to the static pressure in a HVAC system to open and bleed an amount of conditioned air past the damper when the static pressure of the system increases above a selected level, and a weight adjustment for modifying the torque exerted by the second portion against the system static pressure to adjust the selected level.

Abstract: An extraction fan has a housing mounted in a wall with an outlet duct extending through the wall to an outlet opening outside the wall. A damper flap is mounted on the fan suspended by a hinge at an upper edge so as to extend in a closed position across the opening and is movable to an open position under forward air flow from the fan, and tightly closes against a resilient deformable seal when the fan is shut off. A spring biasing cam applies inwards force to the damper flap to bias the damper flap into the closed position, and an outwards force also to bias the damper flap into the fully open position. The mounting plate includes a hood having a top wall extending over the top of the damper flap and a down-turned front flange extending parallel to the damper flap to a bottom edge.

Abstract: A backflow preventer for use in a multiple fan array system that draws air from an inlet area and expels it into a discharge area includes a main body defining an open front end and an open rear end and is adapted for attachment to a fan of the fan array system adjacent an inlet of the fan. Doors are attached to the main body and configured for movement between an open position in which air is permitted to enter through the open front end and a closed position in which the doors block the open front end and air is prevented from entering through the open front end. The doors are movable between the open position and the closed position by a pressure differential between the inlet area and the discharge area. The doors in the open position form a tapered intake passageway that funnels air into the fan.

Abstract: An extraction fan has a housing mounted in a wall with an outlet duct extending through the wall to an outlet opening outside the wall. A damper flap is mounted on the fan suspended by a hinge at an upper edge so as to extend in a closed position across the opening and is movable to an open position under forward air flow from the fan, and tightly closes against a resilient deformable seal when the fan is shut off. A spring biasing cam applies inwards force to the damper flap to bias the damper flap into the closed position, and an outwards force also to bias the damper flap into the fully open position. The mounting plate includes a hood having a top wall extending over the top of the damper flap and a down-turned front flange extending parallel to the damper flap to a bottom edge.

Abstract: An extraction fan has a housing mounted in a wall with an outlet duct extending through the wall to an outlet opening outside the wall. A damper flap is mounted on the fan suspended by a hinge at an upper edge so as to extend in a closed position across the opening and is movable to an open position under forward air flow from the fan, and tightly closes against a resilient deformable seal when the fan is shut off. A spring biasing cam applies inwards force to the damper flap to bias the damper flap into the closed position, and an outwards force also to bias the damper flap into the fully open position. The mounting plate includes a hood having a top wall extending over the top of the damper flap and a down-turned front flange extending parallel to the damper flap to a bottom edge.

Abstract: A pressure relief valve for relieving air pressure from an automotive vehicle interior. The pressure relief valve mounts on a valve mounting location that surrounds a body opening and includes flexible interleaved flaps and a securing mechanism. The flaps cover the body opening, with each of the flaps being generally triangular in shape and having an outer end adjacent to the valve mounting location and a pair of sides extending from the outer end inward to an inner corner, with the inner corners meeting to form a peak. The interleaved flaps form a generally pyramidal-shape that angles away from the automotive vehicle interior as the interleaved flaps extend inward from the outer ends toward the peak. The securing mechanism is secured to the radially outer ends of the flaps and to the valve mounting location.

Abstract: A damper is provided. The damper includes a frame having a central opening through which air passes. A plurality of vanes are rotatably mounted within the frame. At least one of the vanes is oriented about a rotational axis that is offset at a non-orthogonal angle with respect to one of a horizontal and vertical axis.

Abstract: A blade server module applicable to be inserted into a blade server system. The blade server module includes a motherboard tray having a first connector, a motherboard, an extension dock and an adaptor card having a second connector corresponding to the first connector and electrically connect to the first connector via a cable so as to connect the motherboard and the adaptor card. Compared with prior arts, since utilization of the cable, the blade server module is not restricted by smaller motherboard and more and more concentrative electronic elements. Since arrangement of the cable does not occupy space of the motherboard and connects the motherboard and the adaptor card integrally, signals of the motherboard output via the adaptor card and then link the inserted blade server system. Hence the blade server module of the present invention efficiently decreases overall manufacturing cost and its occupation volume.

Abstract: An air filter system and an air filter therefor are provided for use in a building with first and second zones separated by a wall-door system having a wall with a door therein. Weatherstripping is mounted between side and upper edges of the door and a door frame in the wall and between the lower edge of the door and the threshold region of the floor to substantially seal against air flow between the door edges and the door frame and floor when the door is closed. An air flow permitting opening is provided in the wall-door system, sized to permit a controlled amount of airflow between the first and second zones when there is a pre-determined pressure differential between said zones. An air filter is mounted in such opening.

Abstract: A refrigerator is provided that includes a cold air duct that receives cold air circulating inside of a refrigerating chamber and a freezing chamber, an evaporator in the cold air duct, at least one defrosting heater in the cold air duct that selectively emits heat, a fan in the cold air duct, that selectively directs the cold air in an upward or downward direction, a motor that drives the fan, and an open/close device that closes a space having the evaporator, the defrosting heater, and the fan positioned therein selectively, thereby providing an improved defroster for an evaporator.

Abstract: 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 solution described herein is to be passive in nature (although it could be made to respond to electronic or other signals/commands/control mechanisms) and will be capable of responding to a filed fan/blower and engage at the time of fan/blower failure simply by detecting the change of pressure associated with the failed cooling device. The inventive device will reduce the space required and the cost associated with back draft damping or recirculation. In addition, the device can be retrofitted to existing systems and can be designed to be an integral part of a finger guard (a safety feature) of a cooling fan.

Abstract: A damper is provided. The damper includes a frame having a central opening through which air passes. A plurality of vanes are rotatably mounted within the frame. At least one of the vanes is oriented about a rotational axis that is offset at a non-orthogonal angle with respect to one of a horizontal and vertical axis.

Abstract: A back draft damper includes a rectangular shell having a central opening which air can pass through. A plurality of vanes rotatably mounted in the shell are rotatable between open positions where air can pass through the shell and closed positions where air cannot pass through the shell. The axes the vanes rotate about are slightly offset from vertical.

Abstract: A single housing is utilized to mount both an internal fan, and an external alternate flow passage closed by a check valve. The alternate flow passage is defined between an inner and outer wall of the single housing, while the fan is mounted within the inner wall.

Abstract: A method and apparatus for providing ventilation to a selected structure. The apparatus may include various features such as flexible portions, rigid portions, and assembly portions. Further, various steps may be used to form the structure to achieve selected results, such as monolithic formation, inclusion of various positioning members, and the like.

Abstract: An HVAC unit ventilator, particularly suited for schools and hotels, includes a single damper blade driven directly by a motor to control a supply air's mixture of return air and outside air. The damper blade is selectively pivotal to a full outside air position, a full return air position, and various intermediate mixed-air positions. The damper blade has flexible edge and end seals that create little if any frictional drag as the damper blade pivots to the intermediate positions, yet the seals provide a positive, tight seal when the damper stops at either the full outside air position or the full return air position. The unit ventilator includes a filter frame that not only supports an air filter but also provides the damper blade with sealing surfaces and structural support. For rigidity, the damper blade has somewhat of a box-like structure that is bi-directionally reinforced by ribs and triangular gussets.

Abstract: 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 positioned over the air outlet. The back flow damper assembly further comprises at least one damper door movable in an open position and a closed position. The damper door has at least one tooth such that when the damper door is in the closed position, the tooth interacts with at least one of the plurality of openings in the mesh. By periodically cycling the air moving device controlled by device management software, the teeth will close and open, loosening debris from the mesh, allowing the debris to be blown out the rear of the housing once the device is turned back on.

Abstract: A ventilation member is provided that can ensure a long time until fogging is produced in the housing 51 and also can shorten the time until the produced fogging disappears when the interior of the housing is fogged. The ventilation member has: a gas permeable membrane (2), fixed to an opening of a housing (51), for allowing gas that passes through the opening to permeate therethrough; a support body (3) for supporting the gas permeable membrane (2); and a one-way valve (4) disposed so as to serve as an obstruction to permeation of the gas in a partial region of the gas permeable membrane (2). A portion of the one-way valve (4) is fixed to the gas permeable membrane (2) and/or the support body (3). At least a portion (B) of an end part of the one-way valve (4) can be deformed in a predetermined one direction by the pressure of the gas that permeates through the gas permeable membrane (2) in the one direction.

Abstract: A damper assembly for use with an axial fan to prevent air from entering the discharge side of the fan when the fan is at idle. The damper assembly includes a damper door having multiple sections. The sections are able to pivot independently in response to the air flow created by the fan to minimize airflow resistance when the fan is operating.

Abstract: An air backflow prevention member includes a frame assembly including a plurality of vanes and a plurality of stops. The plurality of vanes are rotatable between an open position, wherein the plurality of vanes are oriented oblique to a direction of airflow and in contact with the plurality of stops, and a closed position, wherein the plurality of vanes are oriented perpendicular to the direction of airflow.

Abstract: Methods 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 may also include a backflow damper frame attached to the blower chassis and positioned to receive airflow from the blower chassis and one or more vertical damper vanes rotatably attached to the backflow damper frame. Each damper vane may freely rotate between a first, closed position and a second, open position. The damper vanes may block airflow into the blower exhaust when in the closed position and may freely rotate to a position where the damper vanes are substantially parallel to the airflow from the blower exhaust. The damper vanes may each include a vane pin to rotatably attach to frame holes of the backflow damper frame.

Abstract: 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 positioned over the air outlet. The back flow damper assembly further comprises at least one damper door movable in an open position and a closed position. The damper door has at least one tooth such that when the damper door is in the closed position, the tooth interacts with at least one of the plurality of openings in the mesh. By periodically cycling the air moving device controlled by device management software, the teeth will close and open, loosening debris from the mesh, allowing the debris to be blown out the rear of the housing once the device is turned back on.

Abstract: An aerator includes: a ventilating member that is disposed opposedly to a heat generating object, and that allows air to flow through an inside; and an inlet device that takes in air from an outside, and that sends the air to the ventilating member, the ventilating member including: a discharging portion that discharges the air flowing through the ventilating member to the outside; an opening through which heat generated by the heat generating object is taken in the ventilating member; and a restraining portion that restrains the air taken in by the inlet device from flowing to the heat generating object through the opening.

Abstract: 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 may also include a backflow damper frame attached to the blower chassis and positioned to receive airflow from the blower chassis and one or more vertical damper vanes rotatably attached to the backflow damper frame. Each damper vane may freely rotate between a first, closed position and a second, open position. The damper vanes may block airflow into the blower exhaust when in the closed position and may freely rotate to a position where the damper vanes are substantially parallel to the airflow from the blower exhaust. The damper vanes may each include a vane pin to rotatably attach to frame holes of the backflow damper frame.

Abstract: 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 provided for closing the aperture 3. The closure parts 5 are rotatably mounted adjacent to the aperture 3 about pivots 9 located around the periphery of the aperture. A drive means is provided for moving the closure parts between an open position and a closed position. A suitable fan 6 can be provided for drawing air through the aperture when the closure parts are in the open position. In a first aspect of the invention, the closure parts 5 each comprise closures surfaces having edges, the edges abutting one another in the closed position. In a second aspect of the invention, there is drive member 12 for contacting a drive part 11 of a closure part 5, the drive part 11 being located close to the pivot 9.

Abstract: A damper actuator motor device includes a fan brake device which is secured to a motor rotor shaft and is configured to reduce motor rotation speed in a preferential direction. Preferably, the fan brake device has an asymmetric configuration, and is adapted to gather air radially in an enclosed cavity and discharge it axially in one direction. The fan device preferably is adapted to project a size that takes up more than half of the space of the cavity. When the motor is back driven, the fan brake device causes differentially pressure and air resistance in a confined area, producing a drag and braking force that increases with motor speed. The invention can be applied to motor actuators used to control air dampers and other valves in gas or fluid delivery systems. The invention can also be used to reduce water hammer in water delivery systems.

Abstract: 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 air conditioning cabinet including a first chemical filter, and is configured to transport the air flowing through the make-up air unit into the air conditioning cabinet. The first chemical filter removes airborne molecular contamination from the air transported into the air conditioning cabinet. A second air duct connects the air conditioning cabinet to the critical machine, and is configured to transport the air flowing through the first chemical filter of the air conditioning cabinet into the critical machine. An exhaust duct connects the critical machine to the exterior of the clean room, discharging waste gas produced in the critical machine.

Abstract: 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 connection for enabling rotation of the flap valve element relative to the housing between a closed condition overlying the at least one central airflow passage (24) to prevent airflow from atmosphere (21) into the passenger compartment (19) and an open condition permitting airflow out of the passenger compartment of the vehicle to atmosphere. The at least one flap valve element (14) moves from the closed condition to the open condition in response to differential pressure between the passenger compartment (19) and atmosphere (21).

Abstract: An efficient axial fan has a housing enclosure with a square inlet opening and a round outlet opening, a fan assembly with a drive motor and a propeller secured to a shaft and coupled thereto. The entrance of the fan housing is provided with a shutter assembly which is disposed horizontally or vertically across the square inlet opening and comprises a plurality of vanes including a central vane operated by a centrifugal shutter mechanism secured to one end of the propeller shaft, opposite to the propeller and adjacent to the central vane of the shutter assembly. The centrifugal shutter mechanism is normally provided with a hermetic housing comprising a pair of radial masses operatively connected via a pair of pivoting arms to an axial sliding reciprocating actuator which is disposed adjacent to the shutter central vane.

Abstract: 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 shoulder (16) formed between the inlet portion and the center portion is radiused to reduce disruption of air flowing from the inlet portion to the center portion. The shape of the blades (32) of the propeller (28) is such that the axial velocity produced as the propeller rotates is essentially constant along the length of the blades. The shutter assembly has a large, radiused entrance and airfoil shaped blades which reduce air disruption. The blades have a flexible flap (68) along the trailing edges (64D) which form a seal between adjacent blades to prevent air from leaking from the housing through the shutter assembly.

Abstract: 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 device is engaged in the outlet and includes a frame to which a plate is pivotably connected. The plate is opened by the air sent via the fan device in one direction and seals the outlet when air goes in opposite direction.

Abstract: 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 covering the air opening, an adjustable valve counterweight coupled to the valve plate for biasing the valve plate into a closed position, and a valve plate stop lanyard coupled between the valve plate and the housing for restricting opening of the valve plate. The valve plate stop lanyard includes a clip member for permitting adjustment of the effective length of the valve plate stop lanyard.

Abstract: 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 shoulder (16) formed between the inlet portion and the center portion is radiused to reduce disruption of air flowing from the inlet portion to the center portion. The shape of the blades (32) of the propeller (28) is such that the axial velocity produced as the propeller rotates is essentially constant along the length of the blades. The shutter assembly has a large, radiused entrance and airfoil shaped blades which reduce air disruption. The blades have a flexible flap (68) along the trailing edges (64D) which form a seal between adjacent blades to prevent air from leaking from the housing through the shutter assembly.

Abstract: 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 along the outer edge of the vent parts and includes a lift spacer to keep the valve member spaced from the roof when in an inactive position. When wind speed increases above a predetermined wind speed, the movable member moves into a position adjoining the edge of the vent parts and the bubble is compressed against the upper edge of the corresponding vent part, thereby preventing entry of wind driven moisture and snow into the passages and into the building structure through the vent opening. Accordingly, the moveable valve member acts as a weatherstripping material for the vent. A similar flexible member is usable to weatherstrip windows, doors, and other building openings.

Abstract: 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 communication with the conditioned space when the HVAC system is not in use while automatically opening the cover to provide for treated or forced hot/cool air to be allowed into a space. The duct vent closure provided with an extension forming a counterweight spaced from and rotatable along with the door about a hinge in response to an increase and decrease in air pressure from the duct. Upon generation of a positive air pressure through the duct, the force of air pressure overcomes the gravitational bias provided by the counterweight and the covering is automatically pushed open away from the frame of the apparatus thus enabling the forced air to emanate from the vent and into the room.

Abstract: 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 the inlet air is directed upwardly toward the ceiling of the building. Each louver extends beyond its lower pivot point and contains means for attaching weights of different amounts to the louver depending upon the static pressure within the building thereby allowing adjustment of the air flow in accordance with the static pressure.

Abstract: 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 the perimeter of the duct. The flap is biased by a counterbalance weight toward a duct closing position to close the duct when the fan is not operating. In the preferred embodiment, at least one flap is held in the closed position by a magnetic catch on the flap.

Abstract: 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 shoulder (16) formed between the inlet portion and the center portion is radiused to reduce disruption of air flowing from the inlet portion to the center portion. The shape of the blades (32) of the propeller (28) is such that the axial velocity produced as the propeller rotates is essentially constant along the length of the blades. The shutter assembly has a large, radiused entrance and airfoil shaped blades which reduce air disruption. The blades have a flexible flap (68) along the trailing edges (64D) which form a seal between adjacent blades to prevent air from leaking from the housing through the shutter assembly.

Abstract: 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 communication with the conditioned space when the HVAC system is not in use while automatically opening the cover to provide for treated or forced hot/cool air to be allowed into a space. The duct vent closure provided with an extension forming a counterweight spaced from and rotatable along with the door about a hinge in response to an increase and decrease in air pressure from the duct. Upon generation of a positive air pressure through the duct, the force of air pressure overcomes the gravitational bias provided by the counterweight and the covering is automatically pushed open away from the frame of the apparatus thus enabling the forced air to emanate from the vent and into the room.

Abstract: An anti-draft shutter assembly for an axial flow fan fitted to a duct. The assembly consists of at least one counterbalanced flap 25 supported downstream of airflow from the fan when in operation, and at least one of the flaps beign pivotally supported outside the perimeter of the duct. The flap is biased by a counterbalance weight toward a duct closing position to close the duct when the fan is not operating. In the preferred embodiment, at least one flap is held in the closed position by a magnetic catch on the flap.

Abstract: 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 hermetic housing wherein are located, symmetrical spaced apart in rapport to the fan axis, at least a pair of radial sliding masses operatively connected with flexible cables to an axial sliding reciprocating actuator which is disposed at proximity of the shutter central vane. When the fan starts to operate in either direction by an electric motor, the radial masses slide radially by centrifugal action and pull the axial reciprocating actuator away from the central vane, allowing the shutter heavy tie rods, to open the shutter. When the fan stops, an internal spring housed within the axial sliding reciprocating actuator pushes it against the central vane causing the closing of the shutter.

Abstract: 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 cylindrical ring extending from the outer edge that is connected to a ventilation duct. The connector also includes a pair of spaced, opposed brackets disposed above one edge of the air flow opening. The damper flap includes a generally rectangular plate forming the body of the flap that rests over the air flow opening in the connector to selectively open and close the opening, and a pair of arms extending outwardly from one edge of the plate. The arms are rolled towards the plate to form a pair of mounting tubes separated by a flexible portion of the plate. The length between opposite ends of the tubes is longer than the length between the opposed brackets.

Abstract: 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 the top of the register so as to cover the register opening when there is no air flow through the register. Upon air flow through the register, deflector part is blown outwardly relative to the register so as to expose the opening in the register.

Abstract: 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 side of the heat exchanger through a rear side of the heat exchanger. Duct structure is coupled to the rear side of the heat exchanger so as to cover at least a portion of the rear side, and to receive at least a portion of air exiting the rear side of the heat exchanger. The duct structure is mounted with respect to the heat exchanger so that a portion of the duct structure extends beyond bounds of a sidewall of the heat exchanger. At least one radial-flow type fan is mounted in the extending portion of duct structure such that air flowing through the heat exchanger and the duct structure is pulled by the fan so as to exit generally at the sidewall of the heat exchanger. A motor is operatively coupled to the fan to drive the fan.

Abstract: 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 exerted by the current of gas, it is opened from a position in which the channel (1) is essentially closed. The invention is characterized in that it comprises at least one weight (7) which is arranged to rotate together with the flap (4) and is designed to deliver a torque to the axle (5) in conjunction with the pivoting of the flap (4). The invention is intended in particular for recovery boilers, or heating boilers or steam boilers for solid fuels. The invention achieves an improved air penetration in respect of air flowing into the boiler.

Abstract: 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 a passageway defined by the housing. Air flowing through the passageway causes the damper member to rotate into an open position; when no air is flowing through the passageway, gravity or another force (such as a return spring) causes the damper member to remain in a closed position. A control member may be provided to allow the damper member to placed into a locked closed configuration, a locked open configuration, or an open configuration.