Abstract: A flush mount register comprising a damper box; a substrate tray secured and nested within the damper box; and having a gap defined between the substrate tray and the damper box; and wherein the substrate tray receives a flooring substrate.

Abstract: The present disclosure envisages an air grille. The air grille comprises a front face and a duct face end. The duct face end is in the opposite of the front face. A plurality of flaps are configured on the duct face end, wherein the flaps are capable of collapsing. During shipping the flaps are collapsed whereas before installation the flaps are uncollapsed to facilitate containment of an air filter. The air grille has first thickness when the flaps are collapsed and second thickness when the flaps are uncollapsed, wherein the first thickness is less than the second thickness.

Abstract: A flush mount register for use within a vent opening in a flooring, the flush mount register comprising: a subfloor frame secured to a subfloor, wherein the subfloor supports flooring; a damper box mechanism supported by the subfloor frame; a floor substrate frame and a floor substrate tray secured and nested within the floor substrate frame and having a gap defined between the floor substrate frame and the floor substrate tray, and wherein the floor substrate frame is supported by the damper box mechanism; and wherein the floor substrate tray receives a flooring substrate, and wherein the floor substrate frame and the floor substrate tray are removable to permit access to the damper box mechanism.

Abstract: An air outlet device for an air conditioner includes a housing that also serves as an air outlet, swingable fins supported by the housing, a pinion gear portion that can swing with the fins, a rack gear portion that meshes with the pinion gear portion, and an operation portion that can linearly move with the rack gear portion. When the fins are swinging to a maximum swingable angle, a rack tooth portion of the rack gear portion, which meshes with the pinion gear portion, is a rack large tooth portion that is formed larger than the adjacent rack tooth portions.

Abstract: A vent cover assembly is disclosed, such as for a floating or fixed floor. Example vent cover assemblies may include a support plate configured to be secured over a duct, and a flush mount vent cover. The support plate may define a plurality of first airflow apertures configured to permit airflow from the duct through the support plate. The vent cover may define a second plurality of airflow apertures that are positioned in the vent cover such that the second plurality of airflow apertures are aligned with the first airflow apertures when the vent cover is in a first installed position overlying the support plate. The vent cover may obstruct the first airflow apertures when the vent cover is in a second installed position overlying the support plate.

Abstract: In one embodiment, the invention is a register assembly for inserting into floors, ceilings and walls, comprising a first open top box having a bottom surface, which defines a centrally disposed opening through which air flows from a first environment to a second environment. A support is disposed within the first open top box. A second open top box nests within the first open top box, and is supported by the support. A restraint is associated with the first and second box to restrain the second box within the first box. The first and second open top boxes are sized and dimensioned to be coplanar with each other when nested. A conduit is also defined between the first open top box bottom surface opening and the second open top box to flow air from the first environment to the second environment.

Abstract: An air-conditioning system includes a humidifier for humidifying air and a dehumidifier for dehumidifying air of an air-conditioned room, respectively, multiple transfer fans in each of multiple rooms to transfer air of the air-conditioned room to the rooms, a room humidity sensor for obtaining an indoor humidity of rooms, an air-conditioned room humidity sensor for obtaining a humidity of the air-conditioned room and a system controller. The system controller includes a humidity control section for controlling the humidifier and/or the dehumidifier to maintain the humidity within a humidity range, an air volume determining section for determining an air volume of each of the transfer fans according to the indoor humidity obtained by the room humidity sensor and the humidity obtained by the air-conditioned room humidity sensor and a fan air volume control section for controlling the air volume of the transfer fans according to the determined air volume.

Abstract: A decorative air vent apparatus can be used to cover air vent openings that supply heated or cooled air to a room from a central HVAC system. The decorative air vent is comprised of a housing, a decorative insert, and a decorative face plate. The housing supplants or is inserted into a conventional HVAC air vent opening and provides a space for the attachment and display of a decorative insert on the interior of the vent opening. The decorative face plate attaches to the housing, and has a central opening allowing for visual observation of the interior of the housing for the observer's enjoyment of the displayed decorative insert. The insert and face plate present artistic patterns or depictions and are interchangeable. When not used in conjunction with the housing, the decorative insert can be attached directly to the decorative face plate and displayed on a flat surface.

Abstract: An air flow regulator for a railway vehicle is configured so that the rattling of bars can be prevented without using welding, an affixation member, etc. An intake grill is provided at an intake opening for sucking air from an interior of a railway vehicle. The intake grill includes a frame, bars, and a reinforcement capable of deforming the bars. The frame defines an outer edge of the intake opening. The bars are plate-shaped members spanned between portions of the frame to connect the portions to each other. The reinforcement elastically deforms the bars to generate reaction force therein.

Abstract: A plug which fits into the top aperture of an air vent to be mounted on an air flow pipe or flume prevents cement flowing into the vent when a concrete floor is laid. The vent has a peripheral protrusion and a top flange. The plug protrusion snap fits into a in the top of the vent aperture and can be pulled out when the concrete is set. The plug has sides which extend upward an outward from the vent top so the laid concrete floor has a slot communicating with the vent and the vent top is installed below the floor and thus cannot be easily damaged by storing and removal of produce. The vent is inserted into a plate covering a flume where the plate has ribs and protrusions locating the required rebar and end tabs holding the plates end to end.

Abstract: An air diffuser configured to be positioned in a raised floor, in which the air diffuser includes a sleeve having a first end and a second end with an air flow passage extending through the sleeve from the first end to the second end, a diffuser face disposed at the first end of the sleeve and configured to be exposed to an environment in an installed position within the raised floor, a damper disposed at the second end of the sleeve, and a plenum chamber defined within the sleeve between the damper and the diffuser face.

Abstract: A plug for an air vent which fits into the top aperture of the air vent prevents cement flowing into the vent when a concrete floor is laid. The vent has a peripheral protrusion and a top flange. The plug protrusion snap fits into a concave groove in the top of the vent aperture. The flange extends upward an outward from the vent top so the laid concrete floor has a slot communicating with the vent and the vent top is installed below the floor and thus cannot be easily damaged by storing and removal of produce.

Abstract: A vehicle heating, ventilating and/or air conditioning device (10) comprising a housing (12), in which at least two hot-air guiding ducts (18, 19) are formed for different vehicle interior regions, the hot-air guiding ducts (18, 19) being separated by a housing wall (28). A common heating device (30) and a common air treatment element (32) are provided which are arranged in each case in both hot-air guiding ducts (18, 19), the air treatment element (32) being arranged in the air flow downstream of the heating device (30). The air treatment element (32) has a dividing wall (34) which divides the air treatment element (32) into at least two part regions which are assigned to in each case one hot-air guiding duct (18, 19).

Abstract: An air-conditioning vent vane adjusting device includes a board for driving a vane to rotate, a push-button slidably installed on a panel, and a connecting plate fixedly attached to the board. A fixed plate is coupled to the push-button and is moved together with the push-button, and the fixed plate has a guide notch tilted with respect to the longitudinal direction of the board. The board has a lug accommodated in the guide notch and capable of sliding in the guide notch. With the tilted guide notch and the lug, the board can be moved reciprocally to overcome the problems of requiring a large operating force of the push-button of the tight assembly of the conventional board and connecting plate and the difficulty of opening and closing a vane.

Abstract: A damper arrangement is described which moves dampers from a location closer to an air source to a boot located adjacent to a ceiling register, grill, or the like, thereby allowing technicians or owners to more readily make adjustments. A substantially flush boot collar mounting preserves leak free flow, and keeps insulation installation simple. An internal adjustment mechanism, such as a loop, avoids the need to pull the ceiling grill from the ceiling. Both insulation and subsequent adjustment are simplified.

Abstract: A floor tile for a data center floor is provided that includes a first tile module having a main surface including a first side wall portion and a second side wall portion extending from opposite edges of the main surface, the first side wall portion and second side wall portion each including at least one recess for receiving cabling; and a second tile module having a main further surface adapted to form a removable lid of the first tile module. A data center floor including such a floor tile and a data center including such a data center floor are also provided.

Abstract: A door opener for a linear bar grille.

Abstract: A grate access floor panel comprising a support frame and a plurality of vanes supported by the frame, each of the plurality of vanes having an upstream end and a downstream end with respect to a direction of airflow across the plurality of vanes and faces that extend between the upstream and downstream ends, wherein at least some of the vanes have openings that extend through the faces thereof and have angled tips.

Abstract: A retrofit airfoil for attachment to at least one of the girder members of an open-box load bearing frame supporting an air-grate raised access floor panel is provided. The open box flame includes a plurality of longitudinally spaced apart vertical girder-plate members and a plurality of longitudinally spaced apart transverse vertical reinforcing rib-plate members. The airfoil includes a sheet. The sheet has an upper edge, a lower edge, and a horizontal bend formation positioned along a longitudinal axis established therebetween. The bend formation defines an upper vertical face, and a lower inclined face. The upper vertical face includes a plurality of tongue and groove formations adapted for interlocking fitment with the vertically extending transverse reinforcing rib-plate members, so that the sheet is capable of being slidably attached to at least one of the girder members with the upper edge being positioned adjacent to the lower surface of the top plate.

Abstract: A mounting flange for attaching an HVAC air diffuser terminal in an opening in a floor or other mounting surface. The mounting flange includes a trim ring and a flange clip. The flange clip is adjustably and movably received in a slot defined a side of the trim ring. A pawl on the flange clip engages with ratchets defined in a surface of the trim ring adjacent to the slot to maintain the flange clip in selected position relative the underside of a floor. The air diffuser terminal is secured in the floor opening between gripping surfaces on the flange clip and the trim ring. An optional screw operably connects the flange clip with the trim ring so that the diffuser may be securely tightened in the floor opening.

Abstract: A vent tile includes at least one louver, an actuator configured to control the at least one louver, a thermal imaging sensor configured to monitor temperature of a remotely located apparatus through thermal imaging of a surface of the apparatus, and a controller configured to control the actuator based upon the monitored temperature.

Abstract: In some example pliable air duct systems, inflatable ducts of various diameters and lengths are created by selectively assembling pre-existing stock pieces in different combinations. In some examples, the stock pieces include disconnectable longitudinal joints and disconnectable circumferential joints, wherein the longitudinal joints enable interconnecting multiple stock pieces to achieve a desired tube diameter, and the circumferential joints allow connecting multiple tube segments end-to-end to produce an air duct assembly of a desired length. To control the volume and/or the direction of air discharged from the duct, the duct assembly, in some examples, includes an adjustable register comprising a movable pliable sheet that overlies a discharge opening in a pliable sidewall of the duct. In some examples, the inflatable duct includes one or more cutout patterns on the duct's sidewall to provide guidance in creating a sidewall discharge opening of a proper size and location.

Abstract: An airflow vectoring access floor panel for raised floor data centers has an access panel and a plurality of airflow deflectors. Each of the plurality of airflow deflectors can be independently rotated to affect the directionality of the emanating airstreams. The airstreams can be diverged, converged or impinged in any direction to intersect with the intakes of IT racks within a data center. A fan assembly can be placed underneath the unit to increase the volume of airflow and thus the number and heat load of the IT racks that can be supplied by a single access panel. The airflow deflectors may be rotated manually or by electromechanical drives.

Abstract: A self-powered fluid control apparatus includes a casing having an interior section defined by a plurality of walls, at least one louver positioned within the interior section and extending along a plane, and a fluid flow-driven electrical generator positioned within the interior section substantially along the plane, the fluid flow-driven electrical generator being configured to generate an output current when sufficiently driven by a fluid flow stream through the generator. The flow control apparatus also includes a motor coupled to the at least one louver and a controller configured to generate and provide the control signal to the motor, in which the motor and the controller are powered solely by the output current generated by the fluid flow-driven electrical generator.

Abstract: A removable vent (1) for an air ventilation system, the vent comprising: a frame (2) configured to allow the vent to be removably mounted within an opening; a grille (3) configured to allow the passage of air through the vent from a first face to a second opposing face; and a passive air flow diverter (4, 5) extending beyond the first face (7) of the vent and configured to redirect air flowing laterally across the first face to flow through the vent.

Abstract: A raised floor air grate panel adapted for a multi-vane damper and linkage assembly is provided. The air grate includes an upper and a lower surface and a support frame. The support frame is connected to the lower surface and includes reinforcement ribs, side walls on opposite sides of the support frame, and at least two downwardly projecting air-flow vanes. The air flow vanes define a generally rectangular air-flow control portion adapted to receive a multi-vane damper and linkage assembly so that the linkage is operable from the upper surface of the floor panel.

Abstract: A motorized air register, air diffuser or vent for HVAC systems in commercial and residential applications comprises a supporting frame abutting a floor, wall or ceiling and a second depending frame for enclosing a damper. The damper is motor driven from a first fully open position to a second fully closed position. The damper can be controlled remotely from a wall consol or in accordance with thermostat logic.

Abstract: A personal distribution terminal is designed to provide a self-contained free standing or stand-alone enclosure for easy placement wherever office personnel require convenient access to building services. The placement of this enclosure may be in the vicinity of a standard desk or other workstations or where people congregate. The occupant of the nearby workstation has control over personal air flow for personal comfort. The enclosure is so constructed to also provide space control by displacement ventilation for the surrounding area to provide greater indoor air quality and reduce energy consumption. Incorporated into the enclosure are other services in the modem office, such as electric, both constant or interruptible, communication terminals and internet connections. The use of this terminal eliminates floor and wall grilles for better esthetics, and easier, more economical installation and housekeeping.

Abstract: An air diffuser comprising at least one discharge that is hand manipulable to vary at least two of the airflow rate, the airflow pattern and the airflow direction, wherein the airflow pattern produced by the discharge element may be at least one of a substantially perpendicular axial swirl pattern relative to the discharge element surface or a substantially inclined swirl pattern relative to the perpendicular axis of the discharge element surface.

Abstract: A diffuser for positioning in an opening of a passageway having conditioned air, the diffuser including a grate assembly, a pan assembly, and a retention assembly. The grate assembly includes an upper portion and a lower portion. The upper portion contains an aperture, a plurality of slotted sections, and a flange. The lower portion includes downwardly depending sidewalls and a stop. The pan assembly includes a tray with an aperture and a plurality of upwardly depending legs. The retention assembly couples the grate assembly with the pan assembly and contains a first member that is movable from a first position to a second position for selectively engaging the stop.

Abstract: In a method for manipulating environmental conditions in an infrastructure containing one or more adaptive vent tiles, correlations between opening levels of the one or more adaptive vent tiles and an environmental condition at one or more heat dissipating devices are identified. In addition, one or more environmental conditions at locations proximate to or within the one or more heat dissipating devices are received and errors between the received one or more environmental conditions and one or more reference environmental conditions are identified. Moreover, opening levels for the one or more adaptive vent tiles are determined based upon the identified correlations and errors.

Abstract: The invention relates to a device (10) for controlling airflow (A) in a ventilation pipe (12) comprising one or several air throttle (32) which are synchronously actuated and prevent air flowing (A) in the air pipe in the closed position thereof. The ventilation pipe (12) is provided with a longitudinally extending fixing bar (16) which is arranged on a symmetry plane and provided with the pivot bearing (30) of an axis (28) for driving the air throttle(s) (32) and means (50, 52) for transmitting a force and/or torque to the drive axis (28) connected to the air throttle(s) (32). Said fixing bar (16) provided with different air throttles (12) is usable for the ventilation pipes having different cross sections and forms, an angle (?), preferably, ranging from 15° to 90°, with a longitudinal axis (L) or with a wall (18) of said ventilation pipe (12).

Abstract: A system for cooling computer equipment in a data center. The system includes a raised floor defining a pressurized under-floor plenum; a computer room air conditioning unit disposed on the raised floor and having a hot air inlet and a cold air outlet, wherein the cold air outlet is in fluid communication with pressurized under-floor plenum; and a server cabinet housing server equipment and including a pressurized vertical plenum in fluid communication with under-floor plenum via an inlet duct. The server cabinet is configured to receive a cold air stream from the under-floor plenum via the inlet duct into the vertical plenum and draw the cold air across the server equipment to provide cooling without the use of external fans. The system may also include an inflatable airfoil damper assembly disposed within the inlet duct and configured to provide failsafe variable airflow to the vertical plenum within the server cabinet.

Abstract: An adjustable terminal basket with lightweight horizontal diffuser grille is mounted in the floor of an occupied space for delivering conditioned air from an under floor air plenum to the occupied space above the floor. The modular floor terminal basket regulates the air passing through the terminal, and the lightweight horizontal diffuser grille diffuses the conditioned air along the floor of the occupied space. The lightweight horizontal diffuser grille is constructed with a top and bottom plate with hollow support pillars between the plates and with reinforcing ribs adjacent the center of the diffuser grille.

Abstract: An installation for cooling an electronic device provided on a floor in a room includes an underfloor space below the floor; an air conditioner for sending air to the underfloor space; a first opening provided in the floor and adjacent to the electronic device, for sending air from the underfloor space to the room; and a second opening provided in the floor and adjacent to the air conditioner, the second opening being configured to cause the air pressure of the lower side of the second opening to be lower than the air pressure of the upper side of the second opening.

Abstract: In a bathroom ventilating air-conditioning system including a first air inlet open to a bathroom; a main body conditioning air drawn in from the first air inlet; and a first air outlet open to the bathroom, where the air is circulated in the bathroom and the main body to air-condition the bathroom, the main body is placed in an indoor space other than on the ceiling surface of the bathroom; the first air inlet is connected to the main body through a first air inlet duct; and the main body is connected to the first air outlet through a first circulating duct.

Abstract: An open basket of a resilient mesh material having first and second side edges of a frictional flexible material. The side edges are adapted to provide for positioning of the basket either immediately partially between a vent cover and the duct, or alternatively, fully within the duct at a location immediately below and spaced apart from, the vent cover. The mesh size of the basket is chosen to preclude the passage therethrough of commonly experienced objects, such as rounded objects such as marbles, elongated objects such as nail clippers, pens, coins, etc. any of which may pass through the slots defined in the vent cover.

Abstract: A modular floor terminal basket with a damper is mounted in the floor of an occupied space for delivering air from an under floor air plenum to the occupied space above. The modular floor terminal basket with a damper includes a generally cylindrical basket with air inlet openings on the basket side and an air outlet at the top of the basket. A damper is positioned in the basket for movement from a lower opened position to an upper closed position. The position of the damper is controlled by an actuator which in turn is controlled by a thermostat/controller in the occupied space above the floor. The damper is slideably mounted on a damper guide extending from the bottom of the basket toward the air outlet at the top of the basket. The actuator rotates a threaded shaft that engages a threaded collar attached to the damper so that the damper slides up and down along the damper guide.

Abstract: The invention relates to ventilation grilles (22, 24), ventilation grille frames (10) and ventilation grille slats (12, 14), and to methods of producing ventilation grilles (22, 24). According to the invention, the ventilation grille frame (10) comprises horizontal slat holders (16) and vertical slat holders (18) which lie at least substantially in one plane. As a result, one and the same ventilation grille frame (10) can be selectively fitted with horizontal or vertical ventilation grille slats (12, 14), thus achieving a flexible configuration.

Abstract: An adjustable terminal basket with lightweight horizontal diffuser grille is mounted in the floor of an occupied space for delivering conditioned air from an under floor air plenum to the occupied space above the floor. The modular floor terminal basket regulates the air passing through the terminal, and the lightweight horizontal diffuser grille diffuses the conditioned air along the floor of the occupied space. The lightweight horizontal diffuser grille is constructed with a top and bottom plate with hollow support pillars between the plates and with reinforcing ribs adjacent the center of the diffuser grille.

Abstract: One possible embodiment of the invention could be a protective construction ventilation register and a methodology of operating same. One possible version of the register could comprise of a framework having a peripheral flange attached to an overlying flange, the peripheral flange further defining an air passage; a grid work attached to the overlying flange and located within at least a portion of the air passage; a set of two flexible flaps overlaying the grid work, each flap having an attached edge securing the flap to the overlying flange and unattached edge; a set of deflectors located under grid work that directs the forced air from the underneath the grid work towards unattached edges; wherein the flaps can move from a first closed position covering the grid work to a second open position that has an angle that is less then perpendicular to the plane of the overlying flange.

Abstract: The air diffuser which is designed to be attached to an air supply duct comprises a cannister having a closed and an air inlet pipe proximate its closed end for attachment to the air supply duct. The cannister also includes attachment means proximate its open end so that the cannister can be secured to a supporting frame. A hollow sleeve having an open bottom end is slidingly insertable into the open end of the cannister, and at its top end is provided with a first array of air discharge ports. Co-operating means are located on an interior sidewall of the cannister and an exterior sidewall of the sleeve which permits the sleeve and the cannister to be telescoped together in a non-rotational relationship and which also enables the sleeve to be detachably connected to the cannister at selected telescopic positions.

Abstract: An improved air diffuser is provided, including a housing having a bottom and an upwardly extending side wall with air slots to receive air. The housing supports a grille, and a flow regulator fits within the housing. The diffuser is configured to be secured to a floor by a mounting assembly, including a trim ring and a plurality of retaining mechanisms. The trim ring defines a flange and brackets for receiving the retaining mechanisms. Each retaining mechanism defines an L-shaped mount having horizontal and vertical legs. A cantilevered latch extends from a back of the vertical leg so that, when the vertical leg is inserted into one of the brackets, the latch secures the retaining mechanism to the bracket. The horizontal leg and the flange of the trim ring define a space therebetween for engaging a floor and thereby securing the housing to the floor.

Abstract: A damper assembly and method is provided for readily installing the damper assembly into an air duct of an existing air handling system to regulate air flow through the air duct. The damper assembly includes a mounting plate and a damper plate movably attached to the mounting plate. The mounting plate may include plurality of spaced apart through holes adjacent one end for securing the mounting plate to the air duct with a fastener. The damper assembly further includes means for movably attaching the damper plate to the mounting plate and means for adjusting the position of the damper plate within the air duct. The damper assembly is inserted into the outlet end of the air duct and the mounting plate is mounted with the damper plate positioned within the air duct. The position of the damper plate is adjusted to provide the desired air flow through the air duct.

Abstract: A dust and debris disposal system has a floor-mounted housing adapted to be mounted over an opening formed in a floor for receiving debris particles swept thereto, and a set of dust loosening ribs fixed to an projecting forwardly from a posterior portion of the housing. The invention is improved wherein the dust loosening ribs are moveably mounted on the housing. In one embodiment, the dust loosening ribs and a decorative cover are pivotally attached to the housing by means of a hinge. In another embodiment a rib insert is supported by as ledge structure on the housing and may be snap fit relative to the housing.

Abstract: A wooden vent cover has fixed vanes with major vane surfaces at angles which enhance the throw and spread of air flow through the vent cover. A vent assembly with a wooden vent cover having optimized vane major surface angles including an air flow regulator in combination with the wooden vent cover. The air flow regulator may be a slidable member or other configuration and may be held in place by couplers.

Abstract: A register assembly for covering an air duct opening is comprised of a faceplate, a base, a damper mechanism and a filter frame that are easily assembled together. Most if not all of the component parts may be constructed of plastic reducing the manufacturing cost of the register assembly. The faceplate can be snapped onto the base or manually removed from the base without the use of fasteners or tools. The faceplate is replaceable, allowing the use of various ornamental designs of the faceplate grid on the same base containing the damper mechanism and filter frame. The filter frame is easily removed from the base to allow replacement or cleaning of the filter materials supported in the frame.

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: An under-floor, perimeter-based heating ventilation and air conditioning pressurized air delivery system for use in a space includes a ventilation module, to be located in the floor, a multi-deflection linear bar grille covering the ventilation module, for diffusing the air entering the space, and a pair of apertured plates located below the grille, one plate moves relative to the other to either block more of the resultant apertures, so less air will flow, or to align the apertures, so more air will flow, all at nearly constant velocity and resultant plumage; nuances in aperture size or location allow one segment of the module to engage air flow on a lead-lag basis with respect to the other segments; air flow from the lead apertures induces air flow through a proximate under-floor heating module, to both increase its heat output and temper the ventilation air.

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.