Abstract: The portable ventilating system of the invention includes a base adapted for being towed behind a prime mover, ground engaging apparatus for supporting the base frame in a manner permitting movement of the base over the ground, a fan assembly mounted on the base and having an impeller for creating an air flow, and power transfer apparatus for rotating the impeller of the fan assembly. The power transfer apparatus is connectable to and drivable by a power take off apparatus of the prime mover.

Abstract: A camouflaged outdoor fan system includes a housing, a fan inserted into the housing, and a camouflaged lid removably connected to the housing. The housing is buried in the ground, or in alternative embodiment, mounted to the underside of a deck, the fan is inserted into the enclosure, and the camouflaged lid is placed over the fan to hide the fan and enclosure from view. The fan is operable to generate and propel an air stream out of the housing that can be used for cooling purposes. The system also may include optional features, such as a water-misting device, a heater, motion detectors, an evaporative cooling assembly, a temperature switch, a humidity switch, a rain gauge switch, a wind sensor switch, a dc power source, solar cells, or a remote control system.

Abstract: Methods and systems are provided for enhancing the air quality in buildings during a chemical and/or biological attack and/or when the air quality around a building drops to unacceptable levels. Preferably, relatively uncontaminated (i.e. clean) air is retrieved from a remote location and transported to one or more buildings using, for example, a pipeline, a ship, a truck or any other suitable method. The air is provided to the one or more buildings to enhancing the air quality in the buildings during a chemical and/or biological attack and/or when the air quality around a building drops to unacceptable levels.

Abstract: Methods and systems are provided for enhancing the air quality in buildings during a chemical and/or biological attack and/or when the air quality around a building drops to unacceptable levels. Preferably, relatively non-contaminated (clean) air is stored in one or more clean air reservoirs. Once stored, the clean air is selectively delivered to buildings when a chemical and/or biological attack is detected, and/or when the air quality around a building drops to unacceptable levels.

Abstract: An adjustable air stream introducing device for reinforcement of a blowing power of a primary air stream flowing through a duct, includes a tubular coupler disposed downstream of the duct to confine an annular space. A surrounding seat member is disposed securely in the annular space, and has a plurality of internal ports angularly displaced from one another. A surrounding sash member has a plurality of external ports, and overlies on and is turnable relative to the seat member via a motor-driven actuator member so as to adjust the overlying areas of the external and internal ports, thereby adjusting the amount of the introduced air stream through the annular space.

Abstract: A modulator transportable collective protection system for the decontamination and containment of personnel in a toxic free area. A contamination containment area is provided through which personnel are decontaminated prior to entering the toxic free area. The migration of contaminants is prevented by causing a purge of clean filtered air from the toxic free area to the contamination control area and to the exterior environment. A blower and filter unit provides air to the toxic free area to maintain an over pressure therein, ensuring that all entry to the toxic free area is through a flow of clean air.

Abstract: The invention concerns a ventilation unit comprising an electrically driven ventilator (3), mounted inside a plenum chamber (2) wherein emerge several ducts (7) connected to one or several rooms. Said unit further comprises orifices with specific cross-section (21, 22, 23), and a differential pressure sensor (9) measuring the difference in pressure between two predetermined points, said value being transmitted to an analyzing and control device (10), which compares the differential pressure value to a reference value and controls the ventilator (3), such that it accelerates or slows down it rotational speed, so as to maintain the differential pressure constant and equal to the reference value, to maintain the desired flow rate at said orifices.

Abstract: The present invention relates to a method and a device for providing clean air in premises, wherein impure air is received or taken in into an air treatment device (1) from lower portions of the premises and cleaned or purified therein. A first partial flow (DS1) of air received or taken in into the air treatment device (1) is cooled, while a second partial flow (DS2) of air received or taken in into said air treatment device (1) is heated. The cooled air (KL) in the first partial flow (DS1) is brought to flow, through at least one cell body member (17) in at least one air discharge unit (15), slowly downwards without substantial co-ejection of surrounding air to define at least one zone of clean air (RZ) in the premises beneath the air discharge unit (15). The heated air (VL) in the second partial flow (DS2) is discharged, through an air discharge opening (16), in an upwards direction such that said heated air (VL) rises in the premises at low speed.

Abstract: A snow removal device for use with an air handler or HVAC system includes an extractor plate and a heater for heating the extractor plate. The extractor plate has a plurality of holes and may be bent to define a series of connected “Vs”. The heater may be a heater core, which may be coupled with a snow sensor. Air deflectors may be provided to deflect incoming air towards the hottest part(s) of the extractor plate. The holes in the extractor plate should be sized such that it does not act as a filter. If the heater is a heater core, it may be coupled with the extractor plate using bent metal retainers.

Abstract: A supply air system for supplying air e.g. into a machine room. The supply air system comprises a supply air unit (12), to which means are connected for supplying the supply air from the outside air to the internal space, and an air treatment unit (14) in which means (58, 64) are arranged for treating the air supplied into the internal space. The units are interconnected by at least one duct (16, 16′), equipped with a blower. The supply air system further comprises an air distribution plate or the like for distributing the treated air into the machine room. The above-mentioned units are mounted on top of each other, so that the supply air unit (12) is arranged above the air treatment unit, so that an air chamber (20) for the treated air is formed between said units. At least a part of the air chamber borders to said air distribution plate (18, 18′).

Abstract: A vacuum and pressure tight cooling or ventilating device, specifically designed for thermoforming stations, comprises a shutter element for opening and closing respectively the cooling and ventilating device, the shutter element being mounted on an air inlet section of the ventilating device which, in turn, is completely arranged outside of its related thermoforming station.

Abstract: An air duct silencer can be used at the inlet of an air supply fan unit for a building or other large structure. The silencer has an exterior housing with exterior walls forming outer surfaces of the housing and interior walls arranged in the housing, connected to the exterior walls and defining an annular airflow passageway extending between an air inlet located at one end and a circular air outlet adapted for connection to the fan unit. The outlet defines a primary central axis extending through the center of the outlet and perpendicular to a plane in which the outlet lies. A central airflow defining member has a second central axis extending from an outer end thereof to an inner end and this axis is substantially coaxial with the primary central axis. This airflow defining member is substantially circular in transverse cross-section along its length and has a relatively wide bulb like end section at its outer end and a narrow end section at the inner end.

Abstract: A cooling system for cooling electronic/computer equipment in an equipment room in a station. A fan device causes heat exchanging air circulation between a battery and the equipment, where the air is guided by an air guiding device. The air guiding device is in a first chamber with an inlet which communicates with a battery and a second chamber with an outlet which communicates with the equipment. The first and second chambers are separated by a low impulse device preferably in the form of a perforated partition wall equipped with filter cloth. Turbulent flow which leaves the fan changes the laminar flow when the flow is towards the equipment so that warm surrounding air is not mixed in the air flow.

Abstract: A ventilation apparatus for a building with a roof is disclosed comprising a housing that has openings for exhausting or supplying air. The housing is fixedly secure to the building and covers an opening in the roof. A propeller fan with a motor resides in and is fixedly attached to the housing. The motor controls the fan speed and direction. The motor is controlled by a variable frequency drive that is powered by a power supply. A plurality of temperature controllers is employed to measure the indoor and outdoor temperatures. The temperature controllers operatively engage the variable frequency drive. A splash diffuser pan is fixedly attached to the roof underneath the opening in the roof. The diffuser pan must be larger in size than the opening in the roof.

Abstract: A plug or plenum fan is located near two walls of the plenum such that they tend to act as the scroll for the fan. Additionally, a partition separates the fan from an adjacent corner further enhancing the formation of a scroll while providing a flow passage and a location for at least a part of the active noise control structure.

Abstract: An electric fan mounted overhead for universal adjustment of the air flow direction. A mounting plate clamped to an overhead beam carries a sleeve that rotatively receives a vertical column. The lower end of the column pivotally connects with a mounting arm which carries the fan. A rotation motor can rotationally adjust the column to adjust the lateral direction in which the fan faces. A linear actuator pivots the mounting arm up and down to adjust the tilt angle of the fan.

Abstract: An air handling system for use in a building is used in combination with an elevated floor assembly for mounting on a principal floor of the building, this assembly including a working area floor which lies above the principal floor so as to provide an air plenum between the two floors. An outlet attenuator is mounted on the principal floor and extends upwardly through the working area floor, this attenuator including an exterior outlet housing having an air inlet at the top and a lowermost air outlet in at least one vertical side thereof. The air outlet is connected to the air plenum and is connected to the air inlet by a lower airflow passageway defined by interior walls. This attenuator includes sound absorbing material contained in the housing. An axial or centrifugal fan unit is mounted above the outlet attenuator and provides a downward flow of air to the outlet attenuator. There is also an inlet attenuator section mounted above the fan unit and extending upwardly to a ceiling of the building.

Abstract: A ventilation apparatus for a building with a roof. comprises a housing that has openings for exhausting or supplying air. The housing is fixedly secured to the building and covers an opening in the roof A propeller fan with a motor resides in and is fixedly attached to the housing. The motor controls the fan speed and direction. The motor is controlled by a variable frequency drive that is powered by a power supply. A plurality of temperature controllers is employed to measure the indoor and outdoor temperatures. The temperature controllers operatively engage the variable frequency drive. A splash diffuser pan is fixedly attached to the roof underneath the opening in the roof. The diffuser pan must be larger in size than the opening in the roof.

Abstract: A fan unit has inlet and outlet ducts facing in the same direction. A reversing shuttle is connected to the inlet and outlet ducts of the fan unit and includes a diverter damper and two opposing dampers. The reversing shuttle further includes an outlet that is connectable to a duct network that is under a sports field or portions of a golf course. When the fan unit is running, depending on how the opposing dampers and diverter damper are positioned, air is either blown into the duct network, thereby causing air and possibly other additives to enter the soil profile of the field, or sucked (vacuumed) from the duct network, thereby draining moisture through the soil profile and into the duct network. Moving the diverter damper from a first position to a second position while changing which of the opposing dampers is open and which is closed reverses the air flow in the duct network.

Abstract: An assembly for directing air to a desired location for use as an air blower, carpet drier or the like. An air blower component in a preferred embodiment includes an outlet having attachment means engageable with a separate component such as a ducting housing or carpet drier attachment, through engageable lugs.

Abstract: A method or device is provided for connecting a centrifugal blower to a process requiring the flow of forced air such that the flow of air may be reversed. The method is applied to a process that benefits from the switching of the direction of air flow to either positive pressure or suction. The method was developed primarily use in the forced aeration composting process but may have other applications. The invention consists of a damper with a plurality of vanes rotating on parallel shafts, which is closely coupled to both the inlet and outlet of a centrifugal blower. When set to provide positive pressure, the vanes direct outside air to the blower intake and direct the blower discharge to the process requiring aeration. When set to provide suction, the vanes direct air from the process to the blower intake and direct the blower discharge to a port that may be connected to an air pollution control device.

Abstract: A centrifugal fan system for a building, including a centrifugal fan mounted for rotation about a vertical axis and having a bottom inlet. The fan is mounted in a movable housing having a fan chamber and an air outlet arranged in a side thereof. Wheels are mounted on both sides of the fan housing and engage two elongate track members, that extend horizontally and are mounted on a suitable supporting structure. Thus, the fan and its housing can be moved horizontally away from the top of an input flow concentrator. The housing has an internal, perforated scroll-shaped wall and vertical external walls. Sound insulation is located between the scroll-wall and the external walls. An electrical motor is mounted on the side of the housing and is connected to drive the fan.

Abstract: The invention relates to a method for regulating the atmosphere in a substantially closed sports/exercise space (1) or an animal shelter (11), especially in terms of partial oxygen pressure. In the method, the normal atmosphere of said space (1; 11) is admixed with nitrogen for the creation of a desired low-oxygen (oxygen content <appr. 21%) atmosphere, said low-oxygen atmosphere corresponding to partial oxygen pressure in the air at a certain altitude above sea level. Alternatively, said normal atmosphere is admixed with oxygen for the creation of a desired high-oxygen (oxygen content>appr. 21%) atmosphere. Said mixing of nitrogen or oxygen with air is carried out at normal air pressure.

Abstract: In highrise residential buildings, venting to remove smoke from corridors is required in case of fire. A method of venting smoke from a multi-floor building by providing a single supply and exhaust venting shaft communicating with each floor, with an air supply and exhaust grille opening into each corridor and communicating with the venting shaft; providing a supply source of pressurized air, and an exhaust source of reduced pressure each communicating with the venting shaft, and damper means for selectively closing or opening the communication of the supply source of pressurized air and exhaust source of reduced pressure to the venting shaft. Under normal conditions where pressure is desired in the corridors, the supply source is operating and the communication of the supply source is open to the venting shaft and the exhaust source communication to the venting shaft is closed.

Abstract: An access door to an air handler unit is provided, having a double seal set in the door frame. The double seal is composed of an outer seal which provides a moisture barrier, having an aperture to permit air to pass through, and an inner seal which provides an air barrier. The inner and outer seal are spaced apart to provide an air gap therebetween. A lip is provided along the side and top of the door to shed water away from the outer seal. The door is hingedly supported in the frame, where the outer surface of the door comes in sealing contact with the outer seal and the inner surface of the door comes in sealing contact with the inner seal when the door is closed. A set of door handles is provided to lock the seals in place when the door is closed and latched properly.

Abstract: The invention relates to a ventilation device. Provision is made that the air propulsion plant (20) conveys at least a portion of the air in an air circulating mode by means of at least one variable volume chamber (6) in a pulsating manner at a very low frequency, with the chamber being connected to the room (2) by at least one air passage (21).

Abstract: Apparatus for use with a gaming table or other surfaces for removing and filtering indoor airborne fumes and particles at their point of origin. A laminar exhaust air flow is created across the table surface. The laminar exhaust is drawn by vacuum through air intakes positioned at the table surface and ported through exhaust ducts for filtering and discharge.

Abstract: A fan-equipped air delivery vent for installation into a structure in order to enhance the flow of air from a heating/cooling system includes a main housing portion arranged as a generally rectangular box having an air entrance side closest to the heating/cooling system main blower and an air exit side closest to the interior of the room or space which receives the heated or cooled air. Positioned across the air exit side of the main housing portion is a covering register panel which is arranged with two sections of air-flow louvers. Positioned across the air entrance side of the main housing portion is an enclosing panel which has three air-entrance apertures positioned therein. Mounted to the enclosing panel and positioned within the main housing portion are three electric fans which are wired in parallel and controlled by an ON-OFF switch and thermostat.

Abstract: A method and apparatus for circulating air. The apparatus includes a motor for rotating the blades of a fan. The apparatus also includes a housing for the fan having a wall which is disposed proximate to the blades in the fan in a spaced relationship thereto. In addition, the apparatus includes a motor mount which is operable to support the wall of the housing so as to substantially maintain the spaced relationship between the wall and the blades of the fan.

Abstract: The present invention provides a smoke-eliminating device of simple construction which can easily be installed onto a preexisting casino gaming table. The fan for circulating air during the purification process is located beneath the gaming table to thereby reduce noise and increase the amount of usable area surrounding the gaming device. The smoke-eliminating device of the present invention is placed between the outer edge of the gaming table and a padded rim above this outer edge. Spaces are placed between the padded rim and the outer edge of the gaming table, to thereby vertically raise the padded edge. The space created between the padded rim and the gaming table is filled with intake vents and the spacers. An air circulator and purifying device is located beneath the table and conduit connects the intake vents to the air circulator and purifying device. The intake vents thus remove cigarette smoke from near the gaming table, purify the air, and release the purified air beneath the gaming table.

Abstract: A ventilation system for a multi-storey building, which system comprises a ventilation apparatus mounted on a roof and provided with fans for generating an inlet air flow and a distributing channel for supplying the inlet air flow to various intermediate levels of the building. A service shaft of the building serves as an inlet air flow channel, which shaft forms a flow path for the inlet-air flow directed from the fans downwards, whereby the service shaft has deflecting means for passing a part of the air flow to each intermediate level of the building.

Abstract: A bi-directional airflow controllable system for controlling flow of air through an air circulating system to at least one zone an air temperature of which is to be controlled is coupled to an airflow duct to aid or oppose airflow throughout the duct and the system to the zone. The bi-directional airflow controllable system includes a fan positioned to interact with air moving through the system and the duct. The fan is coupled to a motor to be energized to drive the fan in a forward or reverse direction. The fan when driven by the energized motor in a forward direction creates air pressure from the fan to oppose the flow of air from the airflow duct. The fan when driven by the energized motor in a reverse direction aids the flow of air from the airflow duct. A bi-directional airflow control unit is electrically coupled to the motor.

Abstract: A ventilated gaming table assembly includes a gaming table component, a rail component and a plurality of electric ventilating fan subassemblies mounted about the periphery of the table and operable selectively by individual players.

Abstract: Disclosed is a new pole mounted revolving air circulating fan for inducing air movement within an air mass by use of a rotating impeller which simultaneously revolves around a vertical axis. The pole mounted revolving air circulating fan comprises a telescoping support pole extending substantially vertically upwardly from a mounting floor surface to a mounting ceiling surface, the ends of the support pole frictionally engaging the mounting surfaces. A fan, comprising a rotary air impeller coupled to an electric motor through a drive shaft, is revolvedly mounted on the vertical support pole. A generally cylindrical motor housing encloses the motor and the motor power supply leads. A blade guard, constructed of wire rods forming a substantially annularly shaped wire cage, encloses the impeller to prevent injury from contact therewith. The guard has a central hole through the back wherethrough the front end of the motor housing extends.

Abstract: An integrated sunshade and fan apparatus includes a personal portable sunshade device and a fan assembly integrated thereon which together respectively shade a selected portion of a user's body and generate a cooling airflow over a substantial portion of the user's body. The sunshade device includes a shading disc having a surface area sized for shading a portion of the user's body and a mounting assembly attached to the shading disc for mounting the device to a support structure, such as a chair side. The shading disc has an opening formed therethrough within the peripheral edge of the disc. The fan assembly includes a holding structure attached on the shading disc about the opening therethrough and a fan unit supported by the holding structure in alignment with the opening. The fan unit is operable for generating and directing an airflow through the opening in the shading disc.

Abstract: A method and apparatus for reducing respiratory abnormalities in infants and the incidence of crib death by providing a flow of room air to a sleeping infant's environment to stimulate breathing. In a preferred embodiment of the invention, room air is delivered into a crib through an air plenum that is removably attached to the vertical bars of a crib and positioned within 1 cm to 20 cm of the infant's mouth, nose, larynx and trachea. The flow of room air from the air plenum safely assists the respiration of an infant with inadequate shallow end tidal volume, decreases rebreathing of expired carbon dioxide from the nose, mouth, oral cavity and trachea, prevents pockets of increasing carbon dioxide from developing within the cushions and beddings surrounding the infant, and decreases the likelihood of overheating and other conditions associated with sudden infant death syndrome, apnea syndromes and hypoventilation.

Abstract: A forced flow of outside ventilation air may be selectively directed into the cab of a truck using a specially designed fan assembly that works in conjunction with an existing vent structure disposed within a ventilation passage extending through a wall of the cab. The existing vent structure has a control member which is manually operable from the interior of the cab to selectively permit or preclude outside air inflow to the cab interior through the ventilation passage. The fan assembly includes a housing having an open front side, and an open rear side secured to the cab wall portion over the inner side of the ventilation passage. A cover plate having a pair of air flow openings therein is secured to the front side of the housing for pivotal movement relative thereto between a closed position in which the cover plate blocks the front housing side, and an open position providing manual access to the vent structure control member through the housing interior.

Abstract: An apparatus for mounting a portable ventilation fan at an access port in the wall of an enclosure. The apparatus comprises a fixable base plate having a first opening extending therethrough, and which is detachably mounted to the port with the first opening in alignment with the port opening. A swing plate having a second opening extending therethrough is pivotably coupled to the base plate for pivotal movement between a closed position in which the first and second openings are aligned and an open position. The fan is detachably coupled to the swing plate so that the fan is in alignment with the second opening, whereupon when the swing plate is in the closed position, the fan is operable to promote a flow of air through the access port via the first and second openings.

Abstract: A filter-ventilator-arrangement for employment with clean chambers with at least one ventilator of which the pressure side is located toward an air flow chamber which is limited by boundary walls including a flow chamber formed by at least one annular channel of which one of two boundary walls at least consists of a noise-damping material. Furthermore at least an outer boundary wall consists of noise-damping material. The arrangement includes modular units having several annular channels of which the boundary walls decrease in height from the outside to the inside. Each unit has at least one filter which is arranged in a region below the flow chamber. Innermost boundary walls with inner sides thereof adjoin a plate consisting of noise-damping material. The boundary walls are secured, hanging or suspended on the cover sealing part. At least one heat exchanger lies in a suction region of the ventilator via which the return air flows.

Abstract: A personal portable evaporative cooling device comprising a cowling fitted to a person's back and spaced from said back to form a plenum into which ambient air is forced by an electric motor powered fan located in an opening in the cowling said opening located near the center of the cowling. The air exhausts through a gap between the periphery of the cowling and a person's back. The cowling is supported on said back by a harness. Electric power to the electric motor is provided by batteries carried on a waist band. Moisture is provided by perspiration.

Abstract: A safety system for providing a positive pressure condition in an enclosed space to provide a safe freshair atmosphere in said enclosed space in response to the occurrence of an emergency condition which could introduce smoke or harmful gases into said enclosed space is disclosed.

Abstract: A cage ventilation system for use in isolating a plurality of cages from an uncontrolled environment is provided, including a frame adapted to support cages in a plurality of vertically spaced shelves and an enclosure isolating all supported cages from the uncontrolled environment. A source of air from the uncontrolled environment is connected to the interior of tubes supported above each shelf in the frame, where each of the tubes has an axially disposed opening for outletting air over substantially the entire length of the associated row therebeneath. Each tube includes an interior opening which, in a plane perpendicular to the axial direction of the conduit, has an area which is less than the area of the outlet opening. The enclosure also includes an air outlet.

Abstract: An air handling duct system is provided wherein downstream duct segments are downsized proportionately relative to a immediate upstream duct segments including lateral outlets in order to maintain design air volumes in the upstream and downstream duct segments, wherein downstream duct legs of angular turns are proportionately up sized relative to upstream duct legs of the angular turns in order to prevent increases in flow resistance in the duct system as a result of the turns and wherein lateral branch duct runs are proportionately sized relative to established air flow volumes immediately upstream from said branch ducts and the flow volumes in the upstream ends of said branch duct runs.

Abstract: A portable drilling apparatus 10 designed to be used in environmentally severe locations, such as the Arctic, includes provisions for heating various portions thereof, including a pipe shelter 14. The pipe shelter 14 is used to store, warm, and clean the drill pipe and/or casing prior to insertion in the well. Thus, to provide access for loading the drill pipe and/or casing into the pipe shelter 14, a significantly large opening must be provided. The large opening necessarily results in significant infiltration of arctic air and loss of heated air, thereby increasing the difficulty of maintaining the pipe shelter 14 at a comfortable working temperature. Accordingly, a high-speed spool or window-shade style door 38 is employed to seal the opening against large scale transfers of heated and cold air. Further, an indirect fired air-heater 90 having a capacity sufficient to maintain a positive pressure in the pipe shelter 14 is also used.

Abstract: Disclosed is a new pole mounted revolving air circulating fan for inducing air movement within an air mass by use of a rotating impeller which simultaneously revolves around a vertical axis. The pole mounted revolving air circulating fan comprises a telescoping support pole extending substantially vertically upwardly from a mounting floor surface to a mounting ceiling surface, the ends of the support pole frictionally engaging the mounting surfaces. A fan, comprising a rotary air impeller coupled to an electric motor through a drive shaft, is revolvedly mounted on the vertical support pole. A generally cylindrical motor housing encloses the motor and the motor power supply leads. A blade guard, constructed of wire rods forming a substantially annularly shaped wire cage, encloses the impeller to prevent injury from contact therewith. The guard has a central hole through the back wherethrough the front end of the motor housing extends.