Abstract: A device providing automatic control of temperature for an environment of a working station includes an air box, a baffle member, and a driving assembly. The air box is coupled to a machine defining a working space which the working station is in. The air box defines an opening. The opening allows cooling air to be introduced into the working space. The baffle member is slidably coupled to the air box at the opening. The driving assembly coupled to the baffle member drives the baffle member to cover the opening completely, to cover the opening partially, or to leave the opening uncovered in accordance with a difference between a current temperature of the working space and a desired target temperature of the working space. A related system and method are also disclosed.

Abstract: Embodiments are provided for a method for verifying operation of a variable air valve (VAV) equipment. Embodiments can include operating a motor having a motor shaft coupled to VAV equipment in one of a plurality of modes, and controlling a direction of rotation of the motor shaft coupled to the VAV equipment. Embodiments can also include providing an indication of the direction of rotation of the motor shaft coupled to the VAV equipment. Also provided are embodiments for a system that is used for verifying the operation of VAV equipment.

Abstract: An air intake system for an aircraft, which is switchable between a performance mode and a filtered mode, includes a duct forming filtered air inlet slits. The air intake system also includes interconnected gills adjacent to the filtered air inlet slits. The gills are movable between various gill positions including a closed position substantially covering the filtered air inlet slits and an open position substantially exposing the filtered air inlet slits. The air intake system also includes an actuator configured to move the gills into the closed position in the performance mode and the open position in the filtered mode.

Abstract: The invention provides an apparatus for adjusting the flow of a fluid within a conduit, comprising a slide plate with a flat body and a fixed plate with a flat body. The slide plate and fixed plate have openings on their bodies. At a fully closed position, the openings of the slide plate do not substantially overlap with the openings of the fixed plate. By rotation of an actuator shaft and drive pin disposed thereon, the slide plate may move relative to the fixed plate, whereby the openings of the slide plate begin overlapping with the opening of the fixed plate, thereby allowing flow of fluid through the openings. Sequentially or independently from the movement of the slide plate, rotation of the actuator shaft may cause the fixed plate to rotate relative to the walls of the conduit, whereby flow of fluid may pass through the opening between the conduit and fixed plate assembly.

Abstract: A foldably tensioned boot loadable air damper device for controlling the flow of air through ductwork, and a method of installing same. The damper device includes an actuator having a retractable member and a pivoting member, wherein the pivoting member is operatively connected to the retractable member of the actuator. The damper device also includes at least one support base supporting the actuator and the pivoting member with respect to each other, a foldable damper blade attached to the pivoting member, and at least one tensioned hinge member operatively connected to the foldable damper blade for unfolding the damper blade. The damper device may be inserted through a register boot and into a ductwork when folded.

Abstract: Disclosed therein is an air conditioner for a vehicle which includes a sealing member attached to one side of a door member of a mode door face-sealed with the inner face of an air-conditioning case by the inside wind pressure of the air-conditioning case so as to prevent vibration of the door member by wind pressure of the inside of the air-conditioning case and prevent air leakage from the face-sealed part, and which includes a rib formed on the door member for preventing excessive pressure of the sealing member in order to make actuating force of the door member uniform and to enhance a passenger's sense of manipulation.

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: A device for regulating the airflow in an air damper is disclosed. In at least one embodiment, the device includes a twist sleeve of flexible material, the cross section of which substantially conforms to an outer tube in which the flow takes place, one end of the twist sleeve being disposed on the inner side of the outer tube and the other end of the twist sleeve being disposed in a tube sleeve which can be rotated under an axial displacement controlled in relation to the rotation. In at least one embodiment, the outer diameter of the tube sleeve is somewhat smaller than the inner diameter of the outer tube, so that the tube sleeve slides easily in the outer tube, and in which the tube sleeve is provided with a helical slot, and in which the rotation of the tube sleeve is achieved by an operating apparatus configured in such a way that the operating apparatus pulls round the tube sleeve, at the same time as the tube sleeve moves axially.

Abstract: An insulated central air vent cover is easy to apply and provides a secure seal over a central air vent to prevent cold air that may be in air conditioning duct work from entering a dwelling. The insulated central air vent cover can include a rigid or semi-rigid panel having foam strips formed about its perimeter. Two or more rare earth magnets can be disposed along the periphery of the panel for attracting the cover to steel screws used to hold the air vent cover in place. The insulated central air vent cover can be applied to various vent covers, including aluminum and plastic vents, provided that a steel (or some other magnetically attractive material) screw is used to secure the vent cover in place.

Abstract: A damper for controlling fluid flow includes a main body, a stator and a rotor. The stator may be carried by the main body and include at least one blade having a predetermined shape. The rotor may be moveably connected to the stator and carried by the main body. The rotor may include at least one blade having a predetermined shape and may be moveable between an opened position and a closed position. The predetermined shape of the at least one stator blade and the at least one rotor blade may form a converging-diverging nozzle, and the stator and the rotor may be carried by the main body so that fluid flows through the main body substantially perpendicular thereto. The opened position may be defined as the at least one stator blade being aligned with the at least one rotor blade, and the closed position may be defined as the at least one stator blade being offset from the at least one rotor blade.

Abstract: The invention is a damper that closes off supply duct air when the unit is off to prevent air from exiting through the outlet, and opens when the unit is on to allow room air and/or supply duct air to exit through an outlet. The damper may be either motorized or mechanically biased.

Abstract: The invention relates to a method and mechanism to control air flow through an air handling system. In one aspect, a flow control device for use in an air handling system is provided. The device includes a flow control member having segmented sliding gates, wherein the flow control member is configured to selectively control an air flow stream by moving the sliding gates into the path of the air flow stream. The device further includes a controller member configured to control the movement of the sliding gates. Furthermore, the device includes a communication member configured to send and receive signals regarding the control of the air flow stream. Additionally, the device includes a power member for supplying power to the flow control member, the controller member and the communication member. In another aspect, a method of controlling an air flow stream in an air handling system is provided.

Abstract: An HVAC damper includes a sheet metal frame surrounding a series of pivotal damper blades that are each supported by a pair of plastic bearing members. Each bearing member is a unitary piece that includes a radial bearing, a thrust bearing, a lug for connecting to a damper blade, a shaft-receiving feature for connecting to a drive shaft, and multiple crank pins for selectively connecting to a drive linkage. Choosing which crank pin gets connected to the linkage determines a damper blade's rotational direction relative to the other damper blades. Adjacent damper blades preferably rotate in opposite directions to ensure positive sealing engagement between their adjacent blade tips. The bearing members allow the drive linkage to be installed outside the frame to avoid obstructing the airflow through the damper. During assembly, the bearing members allow the damper blades to be placed within the frame prior to installing the bearing members.

Abstract: An exhaust device applied to an electronic device is described. Memory deformable elements of the exhaust device are heated to shrink, and meanwhile, guide vanes located on an air outlet are driven to rotate and swing back and forth between a left outlet position and a right outlet position, such that the exhaust device reciprocatively changes an outlet position without requiring any external power.

Abstract: A damper for determining and regulating amount of airflow admitted into a heating, ventilation, and air conditioning (HVAC) duct of a building from the ambient includes a variable position gate. The gate is configured to generate a continuous access opening into the duct from the ambient. The damper also includes a mechanism configured to select a position for the gate between and inclusive of fully opened and fully closed and a first sensor configured to sense a velocity of the airflow admitted into the duct. The selected position of the gate determines an area of the continuous access opening and regulates the amount of airflow admitted into the duct. Additionally, when the continuous access opening is not fully closed, the airflow admitted into the duct by the gate is substantially uniform. An HVAC system employing the damper and a method for controlling a temperature inside the building are also disclosed.

Abstract: A damper mechanism comprising a single piece damper blade and a damper seal. The damper blade having a tie-down tab pair, with the tie-down tab pair positioned along a periphery edge of the damper blade for coupling a damper seal with the damper blade. The damper seal is comprised of a set of apertures for insertion of the tie-down tab pair for locking the damper seal with the damper blade.

Abstract: An object of the present invention is to prevent vibration of a sliding door within a guide groove through a fundamental review of the structures adopted in sliding door devices in the related art having a sliding door made to move along a direction intersecting an air flow path to control the flow rate or direction of air within the air flow path. The present invention is characterized in that a tension-applying means is disposed at a sliding unit of a sliding door, which is inserted at a guide groove formed on the inside of an air-conditioner case to apply tension between the sliding unit and the guide groove.

Abstract: The invention relates to a variable flow mixing valve for use in a Heating Ventilation and Air Conditioning module. The module is particularly suited for use in a vehicle. The variable flow mixing valve includes drive means which drive a mixing door and a baffle between various positions in order to allow a relatively warm flow of air, from a first chamber, to mix with a relatively cool flow of air from a second chamber. The baffle and door are linked in such a way as to provide an aperture therebetween through which, in use, the first and/or second flows of air pass. A parking area is also provided for the baffle and is shaped in order to reflect airflow back toward the first and second chambers.

Abstract: An insulating panel attachable to a building, the building defining a building aperture, the building aperture defining an aperture plane extending substantially thereacross. The insulating panel includes a membrane structure defining a first external wall and a substantially opposed second external wall; a peripheral wall extending between the first and second external walls, the first external wall, second external wall and peripheral wall together defining an enclosure; and an internal wall system located between the first and second external walls, the internal wall system being configured so as to divide the enclosure into a first cell located substantially adjacent to the first external wall and a second cell located substantially adjacent to the second external wall, the first and second cells being substantially spaced apart respectively from the second and first external walls by the internal wall system.

Abstract: A bathroom air-conditioner includes a refrigerant circuit in which a compressor, a radiator, a decompressing mechanism and a heat absorber are connected with one another through a pipe, a circulating air-course, and a ventilating air-course. In the circulating air-course, the radiator and a circulating fan for circulating the air of the bathroom are placed. In the ventilating air-course, the heat absorber and a ventilating fan for discharging the air from the bathroom to the outside are placed. The heat absorber makes the refrigerant absorb heat from the air of the bathroom, and the radiator makes the refrigerant dissipate heat to the air of the bathroom for heating the bathroom. During the heating of the bathroom, when a temperature of the bathroom becomes higher than a given temperature, a controller reduces an air-blow amount from the ventilating fan.

Abstract: A damper for controlling fluid flow includes a main body, a stator and a rotor. The stator may be carried by the main body and include at least one blade having a predetermined shape. The rotor may be moveably connected to the stator and carried by the main body. The rotor may include at least one blade having a predetermined shape and may be moveable between an opened position and a closed position. The predetermined shape of the at least one stator blade and the at least one rotor blade may form a converging-diverging nozzle, and the stator and the rotor may be carried by the main body so that fluid flows through the main body substantially perpendicular thereto. The opened position may be defined as the at least one stator blade being aligned with the at least one rotor blade, and the closed position may be defined as the at least one stator blade being offset from the at least one rotor blade.

Abstract: An atmospheric water harvester includes a cooling member over which humid air flows to condense moisture from the atmosphere. The cooling member may be the evaporator of a conventional, gas vapor-based refrigeration circuit. If a gas vapor-based refrigeration circuit is used, the compressor of the circuit may be variable speed. A fan or impeller used to move air through the system may also be variable speed. Preferred embodiments are reconfigurable between at least two operational configurations such that to varying degrees the incoming air may be pre-cooled, before it passes over the cooling member, by heat exchange with colder air that has already flowed over the cooling member.

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: The present invention relates to a multi-valve damper which divides a section of an airflow duct into at least two airflow sections. The damper has a plug body having a proximal end and a distal end. The plug body is adapted to separate a section of an airflow duct into at least two airflow sections. At least two damper blades may be mounted on the distal end of the plug body, each of the damper blades controlling airflow in a respective airflow section. At least one airflow sensor may be provided in each of the airflow sections for controlling the respective damper blades. An actuator mechanism responsive to the sensors may be provided for opening and closing the damper blades. At least one of the proximal end and the distal end of the plug body may have an aerodynamic shape.

Abstract: A cold air supply and control device for a refrigerator is provided. The cold air supply and control device includes a cylindrical, duct main body having an inlet that allows cold air generated in a heat exchange chamber to be introduced thereinto and an outlet that supplies the cold air introduced through the inlet to a refrigerating chamber. The duct main body is pivotably installed to at least one of both side surfaces of the refrigerating chamber. An opening and closing piece is fixed to the side surface of the refrigerating chamber and selectively opens and closes the outlet according to a rotation of the duct main body. An interlocking plate formed below the outlet of the duct main body rotates the duct main body by a load of a shelf so as to open the outlet. In addition, a torsion spring is installed between a surface of the refrigerating chamber and a front or rear surface of the duct main body, and elastically supports the duct main body in a direction in which the outlet is closed.

Abstract: This invention discloses improvements to a damper of the type used in industrial applications to open and close ducts carrying noxious or corrosive materials, such as combustion by-products. The improvements include a linear rack and wheeled pinion system to raise and lower a damper blade plate and improvements to the seal cartridge to prolong the life of the seal membrane and to prevent galling between the blade plate and the seal cartridge or damper frame.

Abstract: A multi-layer barrier for insulation blocking an opening or passage of a building and for providing ventilation to or within a building. A plurality of inflated hollow membrane cube-like structures are formed adjacent to one another, which traverse a longitudinal width of the opening or passage. The hollow membrane cube-like structures are formed from generally rectangular sheets having two long parallel edges, two parallel short edges and a floor having one or more orifices in the forming floor of each non-bottom sheet between membranes, for air connection between membrane structures to be changed from an inflated and a deflated state.

Abstract: A dual airflow control system for an environment having a first air zone and a second air zone. The system includes a first input device operable to generate a first input signal indicative of a desired airflow to the first zone and a second input device operable to generate a second input signal indicative of a desired airflow to the second zone. First and second flow regulators are configured to regulate airflow to the first and second zones, respectively, such that the first and second regulators selectively provide the airflow to each of the first and second zones based on the first and second input signals. A single actuator is associated with the first and second flow regulators. The actuator is operable to simultaneously actuate the first and second flow regulators based on an input from the first and second input devices to allow the desired airflows to the first and the second zones.

Abstract: A baffle assembly for an air control device that reduces the noise associated with operation of solenoid coils. The invention employs one or two solenoid coils mounted in a frame and attached to a fixed plate. An armature, located inside the solenoid coils, is connected on opposite ends to two movable plates which rest on top of the fixed plate. Energizing a solenoid coil moves the armature, which moves the movable plates relative to the fixed plate. Apertures in the plates are provided to control air flow through the plates. The assembly includes sound dampeners to impede the movable plates from making contact with the frame, thereby reducing the amount of noise associated with operation of the solenoid coils.

Abstract: A multi-layer barrier for insulation blocking an opening or passage of a building and for providing ventilation to or within a building. A plurality of inflated hollow membrane cube-like structures are formed adjacent to one another, which traverse a longitudinal width of the opening or passage. The hollow membrane cube-like structures are formed from generally rectangular sheets having two long parallel edges, two parallel short edges and a floor having one or more orifices in the forming floor of each non-bottom sheet between membranes, for air connection between membrane structures to be changed from an inflated and a deflated state.

Abstract: The present invention relates to a multi-valve damper which divides a section of an airflow duct into at least two airflow sections. The damper has a plug body having a proximal end and a distal end. The plug body is adapted to separate a section of an airflow duct into at least two airflow sections. At least two damper blades may be mounted on the distal end of the plug body, each of the damper blades controlling airflow in a respective airflow section. At least one airflow sensor may be provided in each of the airflow sections for controlling the respective damper blades. An actuator mechanism responsive to the sensors may be provided for opening and closing the damper blades.

Abstract: A grating assembly drive means is connected to control the movement of the movable grating between OPEN and CLOSED positions relative to a fixed grating. The drive means moves the movable grating through yieldable connection when moving toward CLOSED position, whereby when such movement is blocked by a foreign object the movable grating stops without damaging the object or the drive. On the other hand movement by the drive means toward OPEN position is direct after removal of any slack caused by a previous yielding.

Abstract: An air-guiding appliance (10) for the directionally defined introduction (R) of air (L) supplied on the rear side (20) of the appliance into a space (22), in particular interior of a vehicle, having a housing (26), at least one duct (24) in which the air (L) is supplied to the housing (26), an air-guiding device (12) which has recesses (14) on the front side and by means of which the direction (R) of the air flowing out into the space (22) can be defined, means for setting the direction (R) of the air-guiding device (12) and, if appropriate, means for setting the quantity of the air flowing into the space (22), is distinguished by the fact that a jet pipe (30) which can be displaced in and counter to the direction of the supplied air (L) is arranged in the housing (26) or in the duct (24) and its air outlet opening (28) is smaller in size than the cross-sectional surface of the air-guiding device (12), in which case, in the retracted position of the jet pipe (30), the air (L) emerges from the air-guiding devi

Abstract: An airflow control device has a fixed damper element and a movable damper element. Shape memory wires are connected to the fixed damper element and the movable damper element. The shape memory wires are alternately electrified to cause the contraction thereof to move the movable damper element in opposite directions. A heater can be provided along with the damper elements to overcome frost buildup in cold environments, such as refrigeration systems.

Abstract: A multi-layer barrier for insulation blocking an opening or passage of a building and for providing ventilation to or within a building. A plurality of inflated hollow membrane cube-like structures are formed adjacent to one another, which traverse a longitudinal width of the opening or passage. The hollow membrane cube-like structures are formed from generally rectangular sheets having two long parallel edges, two parallel short edges and a floor having one or more orifices in the forming floor of each non-bottom sheet between membranes, for air connection between membrane structures to be changed from an inflated and a deflated state.

Abstract: A vent assembly has a vent cover and sliding air flow regulator for controlling the flow of air through the vent cover. Unique couplers may be used to interconnect the air flow regulator and vent cover for relative sliding motion. In addition, actuator mechanisms are used to move the air flow regulator between open and closed positions. A vent assembly for corner applications is also disclosed.

Abstract: A high pressure air supply duct is terminated by a termination receptacle defining a cylindrical housing with an inlet pipe connected to the duct and generally at right angles to the axis. The housing has one end closed and a mounting flange member at the open end for attachment of the housing to a mounting surface. A generally cylindrical damper sleeve has an open discharge end connected to a vent plate and an insertion portion extending to the bottom of the housing for receiving the air therefrom. The vent plate has a plate portion with a central perforated discharge area which is perforated for the passage of air therethrough and a peripheral surrounding flange and can be rotated about the axis of the housing to rotate the damper sleeve. The damper sleeve has a projecting notch engaging into a slot in the housing to hold it in place.

Abstract: An air velocity control unit includes first bars fixed using a frame. Second bars are disposed below the first bars. The second bars are alternatively arranged between the first bars. The second bars are connected with each other. The unit further includes a control member for moving the second bars upwardly and downwardly to control the air velocity. A connecting member connects the second bars to the control member. Clean air flows into a clean room by a controllable velocity in accordance with the upward and downward movement of the second bars.

Abstract: The present invention is related to a venting apparatus for a computer. The apparatus includes a chassis plate and a venting plate. The chassis plate has a first hole and a second hole. The venting plate has a plurality of venting apertures. The venting plate is selectively disposed over the first hole and the second hole.

Abstract: A heat-shrinking film packaging machine includes a conveyor for transporting an article to be packaged through a heating device to have a heat-shrinking film surrounding the article heated and shrunk and thus tightly packaging the article. The heating device includes a hot air flow control device including two air supply devices located on opposite sides of the conveyor to define a channel through which the article is transported. Each air supply device has a surface in which an array of openings is defined and arranged in rows and columns for supplying hot air toward the article. A blocking bar is movably mounted to the surface of each air supply device and associated with each row of the openings. The blocking bar is movable with respect to the openings to selectively and partially block the openings for controlling hot air flow through the openings.

Abstract: A damper including a pair of damper members movable with respect to each other is disclosed. Each damper member has at least one wall correspondingly inclined to an axis of the damper. The inclined walls are relatively movable between open and closed positions. The walls include plural apertures separated by imperforate portions. The apertures in each wall are disposed such that the apertures of one of the damper members are at least partially blocked by the imperforate portions of the other damper member when the inclined walls are in the closed position.

Abstract: An improved foundation vent with increased net free area is provided. The foundation vent has a frame that surrounds and defines an opening and a grill supported by the frame and spanning the opening. The grill has an inside face disposed on the inside of a crawlspace when the vent is mounted in a foundation wall and an outside face disposed on the outside of the crawlspace. A mesh screen is mounted to the frame and spans the opening adjacent the inside face of the grill. The grill is provided with projecting standoffs that support the screen at a predetermined distance from the inside face of the grill to form a plenum between the screen and the grill. A raised peripheral rim is provided on the frame and supports the peripheral portion of the screen. The spacing of the screen from the inside face of the grill and the plenum formed thereby unblocks the portions of the screen that otherwise would be blocked by the members of the grill and thus increases the net free area of the foundation vent.

Abstract: A ventilation control system is disclosed for a building having an elongated ceiling vent opening, the system having a vent door, spaced apart brackets pivotally supporting the door on the building structure adjacent to the ceiling vent opening such that the door is movable between closed and opened positions, and an actuating mechanism for moving the door between the closed and opened positions. The vent door has an elongated door casing of plastic material having a hollow interior and opposite side walls, a support member located in the hollow interior of the door casing adjacent to each of the opposite side walls and a foam material substantially filling the hollow interior of the door casing. The door casing may be extruded from plastic material and has integrally formed outwardly extending sealing members which engage the building structure when the vent door is in the closed position to seal the vent opening.

Abstract: A flexible air duct is provided for conveying and distributing a source of forced air to a room or other area of a building. The air duct includes a flexible outer casing made of an air permeable fabric that evenly disperses the air into the room. To prevent the fabric from sagging when the source of forced air is periodically turned off, a support frame holds the casing in a generally open tubular shape even when the duct's interior and exterior air pressures are the same.

Abstract: A raised floor panel is strengthened with a grated core. The working surface of the floor panel may be either solid or perforated. The floor panel is supported by a center pedestal that extends from a sub-floor. The angle of the panel can be varied by pivoting the platform of the pedestal that supports the floor panel. Two ventilation damping panels, surrounding the column of the pedestal, are connected together and may be positioned in several configurations to change the ventilation characteristics of the raised floor.

Abstract: 1. Heating and/or air-conditioning installation, especially for a passenger compartment of a motor vehicle.2.1 In known installations for heating and/or cooling, hinged flaps are employed as control means for distributing the air, which flaps need a large mounting space.2.2 It is proposed that a mounting frame with hinged or sliding lamellae be inserted into the free cross-sections of each of the channels to be controlled.2.3 Use of the motor vehicle air-conditioning systems.

Abstract: The distribution assembly is arranged for mounting to a ceiling portion of an existing mobile home, that in turn includes an existing air conditioning outlet housing. The assembly employs a central plenum housing arranged to receive the air conditioning outlet housing while permitting securement by a flange of the central plenum housing to the ceiling in surrounding relationship relative to the outlet housing. A distribution duct in pneumatic communication with the central plenum housing extends therefrom in pneumatic communication therewith. The distribution duct and the central plenum housing each employ a plurality of windows having sliding doors to permit various air flow from within the central plenum housing and the duct for distribution throughout an interior compartment of an existing mobile home.

Abstract: A ventilation air valve assembly (10) for use in aircraft or similar contexts is provided which may be selectively opened and oriented for directing desired quantities of ventilation air in desired directions. The valve assembly (10) includes a tubular valve body (12) presenting an apertured, flattened lowermost end wall (40) together with an internal valve member (14) in the form of an elongated shank having a bottom surface (46) and a marginal sealing surface (48). In the valve-closed position of the assembly (10), the sealing surface (48) engages a correspondingly configured internal surface of the body (12) in order to prevent air flow through the body (12). Moreover, in the valve-closed position, the lower surface of the valve assembly (10) is flat, essentially flush, and presents no dirt-collecting recesses.

Abstract: A valve for use in an air distribution system has an inlet member for the axial flow of air therethrough along a central axis. A downstream portion of the inlet tapers outwardly in the downstream direction. Support structure is presented from which an extension projects downstream along the axis of the inlet. A damper for controlling air flow through the inlet defines an aperture penetrated by the support structure extension and a second aperture radially displaced from the first aperture. A motor is attached to the damper and is directly coupled to the support structure extension. The motor selectively positions the damper along the support structure extension between a downstream open position and an upstream closed position.

Abstract: A fluid control valve unit particularly suited to be used as an air control valve in an overhead passenger service unit for aircraft, buses, trains and the like. This valve unit includes a non-rotatable and axially movable closure member which moves in response to rotation of an axially non-movable actuator member supported in a universally pivotable and tiltable housing. This valve has relatively few component parts and is thus easy to manufacture and assemble. A helical groove on the actuator member cooperates in a cam-like manner with a projection on the closure member to create the desired translation.