Abstract: A novel sanitary and odor free workstation having two spaced apart, transparent plate members that are operatively interconnected to a vacuum source and in combination define a vacuumed air evacuation area that functions as a workstation between the plate members. Thus, a user can easily position an object of choice within the workstation, or even adjacent thereto, and have hands free controlled access that allows manipulation of the object yet protects the user, and others, from physical or airborne transference of bacterial matter and from any undesirable odors emitting there from and also protects the user's eyes from any potential damage, respectively. Furthermore, the workstation is portable, self-contained, safe, sanitary and is substantially usable with any object of choice.

Abstract: A portable ventilator for removing deleterious gasses from a welding site provides a funnel-like collection head structurally carried by an electrically non-conductive rigid dispersement tube carrying a powering structure. The powering structure provides pressurized gas from an external source through an adjustment valve to an input nozzle carried in axial alignment in the channel defined by the dispersement tube spacedly adjacent the joinder of the collection head with the dispersement tube to output pressurized gas toward the distal output end of the dispersement tube.

Abstract: A fabrication station (117) suitable for use mobile unit (1) or as stand alone unit for fabricating solid surface construction materials is provided, as is a method of use therefor. The fabrication station is equipped with climate control units (23, 23a, 123) fabrication equipment (24, 124) and other environment control equipment. Therefore, solid surface construction materials can be fabricated onsite or at a remote fabrication shop. In the fabrication process according to the present invention, dimensional information is laid out directly onto the solid surface material stock. The fabrication station can include an adjustable support (124a) that supports each slat support channel portion so that the position of the slat support channel portions is adjustable relative to the support wall and one another to provide a fine adjustment. The fabrication station can also include removable slat portions 124c to accommodate different shapes of solid surface material to fabricate.

Abstract: Methods and apparatus for controlling impurity levels in an enclosed printing press environment are disclosed. A disclosed system controls impurity levels by using variable speed fans to control the intake of air into the enclosed environment and the exhausting of air from the enclosed environment. The exhaust fan is used to control the impurity levels within the enclosed environment. Adjustments to the speed of the exhaust fan are based on sensors which measure impurity levels in the enclosed environment. The intake fan is used to maintain a constant static pressure level within the enclosed environment. Adjustments to the intake fan speed are based on static pressure sensors within the enclosed environment.

Abstract: An air flow monitoring and control system with reduced false alarms includes an alarm sensor for monitoring air flow in a fume hood or the like, set to provide a warning if air flow drops below a predetermined amount. A local controller monitors the alarm, and disables it when the hood is set to reduced air flow, whether by a local timer or by command of a central control system. Optionally, the controller itself can operate a variable speed drive to reduce air flow on a timed basis, and the controller can communicate with facility management through a dialer or the Internet, or can interface with a central control for the facility through a facility bus.

Abstract: A sanding hood has a bottom vent for above a bottom shelf attached to a sanding bench with the shelf aligned with the top of the bench. A series of halogen lights attach above the bottom vent to shine on the bench. An upper shelf above the lights shields the worker's eyes from the lights. The upper shelf has sandpaper dispenser rolls and a flat top for storage.

Abstract: The present invention relates to a range hood for evacuating air or emitted gas, which contains oily smoke and the like generated by cooking on a range, to the outside of a house.

Abstract: A range hood having an improved grease collecting motor housing and improved fan and motor connection. Housing openings are defined by circular walls projecting vertically into the housing acting to collect grease within the housing. A flange depends radially outwardly from, and at an angle to, the circular wall. Air entering the housing via the fan deflects off the flange and prevents turbulent air within the housing from exiting the housing in the space located between the circular wall and the fan. The fan connection is comprised of a threaded recess in a shaft of the motor and a fan cap having a threaded bolt. The shaft is inserted through an aperture in the fan and the fan cap threadingly connected to it. A tray attachable to the housing, and defining an air intake opening has an improved mating relationship with a lower panel of the range hood.

Abstract: A domestic or industrial hood having a rapid attachment device for a centrifugal fan wherein an opening (13) is foreseen in the structure (12) of the hood being externally connectable to a discharge hose and adapted to receive one end (17) of a centrifugal fan (16), and wherein the opening (13) in said hood is equipped with a flange (14) for centring and housing the upper exit end (17) of the centrifugal fan (16) and also including at least one easily removable centring and attachment element (19) from a lower portion (20) of the fan (16) on the hood structure.

Abstract: A fume hood is pivotally mounted on a vertically extending axle fixed to a chemical tank and extending through a sleeve in the hood allowing the fume hood, with a flexible coupling to an exhaust blower, to pivot from a use position adjacent the tank to a position pivoted away from the tank to allow an operator to gain access to the tank. In one embodiment, the hood includes a support leg for supporting the end of the hood remote from the pivot connection to the tank.

Abstract: A smoke exhauster includes a housing having an inclined plate extended forwardly and downwardly from an upper panel of the housing, a fan casing includes an upper panel secured to the upper plate of the housing to support one or more motors or fan devices, and includes a cut off portion formed in the front portion to receive the inclined plate of the housing and to allow the fan casing to be disposed forwardly relative to the housing, The fan casing and thus the fan device are disposed forwardly relative to the housing for allowing the fan device to effectively draw smoke or the like.

Abstract: A gas-exhausting module structure includes a casing having a first open end and a second open end. An air-exhausting channel is defined within the casing. The air-exhausting channel has an upper opening that is lower than the second open end of the casing. A blower comprising a chamber, an air outlet, and an air inlet is provided. The blower is in communication with the air-exhausting channel. The air inlet of the blower is connected to an air-sucking box. When power of the blower is turned on, it sucks air into the air-exhausting channel and expels high-pressure air through the upper opening of the air-exhausting channel.

Abstract: A ventilation system for removal of hair spray fumes for removing hair spray fumes from a particular room. The ventilation system for removal of hair spray fumes includes a fume passage assembly including a tubular conduit being adapted to be mounted to a building structure such as a ceiling, and also including a hood being attached at an end of the tubular conduit; and also includes an assembly of drawing fumes through the hood and the tubular conduit.

Abstract: A smoke exhaust structure including a housing, a circuit system and a smoke exhaust system. At least one motor is arranged on the housing. The circuit system is connected with the motor and a controller via electric wire. The smoke exhaust system is composed of at least one fan, a wind chamber and at least one oil tank. The smoke exhaust system is an independent passage. The wind chamber communicates with the housing and the circuit system only via at least one through hole which is slightly larger than the motors, permitting the motor to pass therethrough. The wind chamber of the smoke exhaust system is totally isolated from the circuit system and the housing, whereby a user can easily detach the components of the entire smoke exhaust system for cleaning or replacement so as to fully clean up the oily dirt and ensure good smoke exhausting function of the smoke exhaust structure.

Abstract: A smoke exhaust structure including a housing, a circuit system and a smoke exhaust system. At least one motor is arranged on the housing. The circuit system is connected with the motor and a controller via electric wire. The smoke exhaust system is composed of at least one fan, a wind chamber and at least one oil tank. The smoke exhaust system is an independent passage. The wind chamber communicates with the housing and the circuit system only via at least one through hole which is slightly larger than the motors, permitting the motor to pass therethrough. The wind chamber of the smoke exhaust system is totally isolated from the circuit system and the housing, whereby a user can easily detach the components of the entire smoke exhaust system for cleaning or replacement so as to fully clean up the oily dirt and ensure good smoke exhausting function of the smoke exhaust structure.

Abstract: A vacuum conduit system for removal of fumes and air borne particulate matter includes a primary duct and a plurality of flexible secondary ducts mounted in fluid cooperation to the primary duct. The primary duct includes hollow rigid conduit sections interspersed between, and in fluid communication with, hollow flexible conduit sections. An upstream end of the primary duct is sealed substantially air-tight. An opposite downstream end of the primary duct cooperates with an air extraction means for extracting air from the primary duct. Secondary ducts may be mounted at their downstream ends to the rigid conduit sections and inclined at a first angle relative to the rigid conduit sections so that secondary airflows leaving the downstream ends of the secondary ducts are inclined into an airflow stream in the primary duct so as to be directed in a downstream direction of the airflow stream in the primary duct to generally equalize vacuum levels at the downstream ends of the secondary ducts.

Abstract: A vacuum conduit system for removal of fumes and air borne particulate matter includes a primary duct and a plurality of flexible secondary ducts mounted in fluid cooperation to the primary duct. The primary duct includes hollow rigid conduit sections interspersed between, and in fluid communication with, hollow flexible conduit sections. An upstream end of the primary duct is sealed substantially air-tight. An opposite downstream end of the primary duct cooperates with an air extraction means for extracting air from the primary duct. Secondary ducts may be mounted at their downstream ends to the rigid conduit sections and inclined at a first angle relative to the rigid conduit sections so that secondary airflows leaving the downstream ends of the secondary ducts are inclined into an airflow stream in the primary duct so as to be directed in a downstream direction of the airflow stream in the primary duct to generally equalize vacuum levels at the downstream ends of the secondary ducts.

Abstract: A room ventilator for venting smoke exhaled by a smoker from a room to an exterior location. The room ventilator has an intake unit located in the room for drawing in smoke exhaled by the smoker, an air pump for producing an air flow to draw the smoke into the intake unit and exhausting the smoke to the exterior location, a connecting tube for connecting the intake unit to the air pump, and a window outlet adjuster for mounting in a window which enables a connecting tube to pass from the room to the exterior location. The window outlet adjuster has adjustable flaps for forming a barrier between the room and the exterior.

Abstract: A smoke exhauster includes a housing having a front opening and a rear orifice, for receiving two filter devices respectively. One or more fan devices are disposed in the housing for generating air to flow through filter devices, and a device may be used for selectively guiding the air to flow through either of the filter devices and includes one or more stop panels secured to the housing for blocking the air passages to the filter devices or includes a cover engaged onto the orifice of the housing for blocking the orifice of the housing.

Abstract: A room ventilator for venting smoke exhaled by a smoker from a room to an exterior location. The room ventilator has an intake unit located in the room for drawing in smoke exhaled by the smoker, an air pump for producing an air flow to draw the smoke into the intake unit and exhausting the smoke to the exterior location, a connecting tube for connecting the intake unit to the air pump, and a window outlet adjuster for mounting in a window which enables a connecting tube to pass from the room to the exterior location. The window outlet adjuster has adjustable flaps for forming a barrier between the room and the exterior.

Abstract: A network for an oil-smoke exhausting device includes multiple cone-shaped nets separately piled up to one another and adapted to be mounted under an inlet of the oil-smoke exhausting device. Each net has a close end and an open end. The close end has a diameter smaller than that of the open end and the open end is adapted to be mounted around an inlet of the oil-smoke exhausting device. A flange radially outwardly extends from the open end of each of the nets and abuts one another. A washer is mounted between each two adjacent nets to form a chamber between each two adjacent nets. A fastening member securely extends through the cone-shaped nets and the wash ers to hold the washers in place. A frame is mounted around the open ends of each of the cone-shaped nets to combine the flanges securely abutting one another.

Abstract: The conduit (5) includes a rotary fitting (11), and two segments (18, 19) elbow-connected to each other and each having an articulated mechanism (23, 24) including a par of U-section bars (26, 27) connected to each other in the form of an articulated parallelogram by means of two articulated elements (37, 44; 44, 51). A spiral compression spring (35, 36) is housed between each pair of bars (26, 27), and is compressed between a disk (55), integral with one of the bars (26, 27), and a flange (64) is sliding along a threaded rod (62). The flange (64) is locked on the rod (62) by means of a nut (67), and the rod (62) is connected to a lever member (69) pivoting on one of the articulated elements (37, 44) so as to adjust the action of the spring (35, 36) as a function of the angular position of the relative segment (18, 19) with respect to the articulated element (37, 44).

Abstract: An improved hood enclosure for isolating wood pulp washing equipment from the ambient environment. The hood has a pair of end members, a pair of skirts along each side to connect to the end member together, and an upper spine also connected at each end to the end members. A pair of clamshell style doors are mounted to the spine along longitudinal hinge lines and are opened vertically. A plurality of access doors are positioned within the skirts, and a plurality of spray or shower pipes penetrate the hood through an end panel to deliver wash liquid to the internal wash drums positioned within the wash vat. Several sealing methods are incorporated to provide sealable access for the access doors, the clamshell doors, and access to the interior of the washing vat for the shower pipes. The clamshell doors abut a peripheral neoprene sealing gasket and are held against the gasket by their own weight.

Abstract: The conduit (5) includes a rotary fitting (11), and two segments (18, 19) elbow-connected to each other and each having an articulated mechanism (23, 24) including a pair of U-section bars (26, 27) connected to each other in the form of an articulated parallelogram by means of two articulated elements (37, 44; 44, 51). A spiral compression spring (35, 36) is housed between each pair of bars (26, 27), and is compressed between a disk (55), integral with one of the bars (26, 27), and a flange (64) sliding along a threaded rod (62). The flange (64) is locked on the rod (62) by means of a nut (67), and the rod (62) is connected to a lever member (69) pivoting on one of the articulated elements (37, 44) so as to adjust the action of the spring (35, 36) as a function of the angular position of the relative segment (18, 19) with respect to the articulated element (37, 44).

Abstract: A roof louver filter system for preventing snow from entering an attic of a building structure through a roof louver vent during inclimate weather conditions. The inventive device is comprised of an air permeable material that is formed into a U-shaped structure for being positioned within a roof louver. The U-shaped structure includes a front portion, a first side portion and a second side portion. The first side portion includes a first slanted edge and the second side portion includes a second slanted edge for conforming to the rear rim of the roof louver when installed. The inventive device is preferably constructed of a polyester fiber material thereby preventing water and insects from entering into the roof louver. The inventive device prevents snow from directly blowing into the attic of the building through the roof louver during inclimate weather conditions.

Abstract: A range hood includes a motor housing having two slanted motor supporting platforms provided thereon wherein two motor are detachably mounted on the two slanted motor supporting platforms respectively such that the motors are inclined with respect to a ceiling of a casing. A drag area provided by the inclined motor arrangement is highly increased in order cover the entire cooking surface. Furthermore, all parts of the range hood are adapted to be assembled and disassembled without using tools such that a user is able to easily clean up the range hood part by part in which the parts made of durable material are dishwasher-safe so as to easily maintain the range hood for better performance.

Abstract: An exhaust hood having an inverted V-shaped interior, the walls comprising the inverted V including grease filters and the apex of the inverted V lying adjacent to an exhaust duct to be placed in communication with an exhaust fan. The interior of the hood thus being shaped like an inverted funnel, rising gases and entrained contaminants are directed to the grease filters and thence to the exhaust duct.

Abstract: A tank cover made of a plurality of sections, which when connected, form a continuous tank cover enclosing the pickle tank. The tank cover is constructed of a plurality of exhaust sections each having an exhaust outlet and a plurality of sections having a plenum chamber which adjoin each other and the exhaust sections. The sections of the tank cover having the plenum chamber have an internal chamber for collecting evaporated acid fumes and transporting these fumes to exhaust outlets connected to the exhaust sections where the fumes may be discharged to an external scrubber.

Abstract: An improved hood enclosure for isolating wood pulp washing equipment from the ambient environment. The hood has a pair of end members, a pair of skirts along each side to connect to the end member together, and an upper spine also connected at each end to the end members. A pair of clamshell style doors are mounted to the spine along longitudinal hinge lines and are opened vertically. A plurality of access doors are positioned within the skirts, and a plurality of spray or shower pipes penetrate the hood through an end panel to deliver wash liquid to the internal wash drums positioned within the wash vat. Several sealing methods are incorporated to provide sealable access for the access doors, the clamshell doors, and access to the interior of the washing vat for the shower pipes. The clamshell doors abut a peripheral neoprene sealing gasket and are held against the gasket by their own weight.

Abstract: A low noise hood is provided having a housing with an air inlet and an air outlet. A first modular device in the form of an intake muffler with a first air duct passage extending therethrough is mounted within the housing near the air inlet. A second modular device in the form of a discharge muffler with a second air duct passage extending therethrough is mounted within the housing near the air outlet. The second air duct passage is shaped to prevent a straight unobstructed passage for air flow through the second passage. A third device comprising an air moving device is secured by a mounting arrangement within the housing. A first vibration isolator such as a plastic saddle is provided in the mounting arrangement for the air moving device for absorbing vibrations and a second vibration isolator in the form of a flexible connector is positioned between the air moving device and the second air duct passage. A third vibration isolator in a mounting arrangement for the discharge muffler may also be used.

Abstract: This invention continuously monitors the differential pressure between two environments, and dynamically adjusts the air handling system of the controlled environment to maintain a desired differential pressure setpoint by using a closed loop control methodology. Local and remote users can initialize, configure, monitor, and readjust the differential pressure setpoint as necessary. A differential pressure sensor transmits data to the system controller for processing and analysis. The system controller interfaces to a wide variety of air handling systems by using interchangeable air handling subsystems that plug into the invention. Each subsystem has the necessary hardware interface and software control methodology to easily and transparently enable the system controller to interface with a wide variety of air handling configurations.

Abstract: An exhaust device (100) for a kitchen exhaust system incorporating a range hood (11) is disclosed, which is capable of substantially reducing generation of noise while efficiently evacuating fumes from the kitchen without a suction loss. The exhaust device (100) comprises a vent box (20) communicating with an exhaust duct (40), which may be housed in the hood (11) or in a housing box (10) provided above the hood (11). The vent box (20) includes a connection enclosure (20a) in its upper portion, which converges toward the duct (40). The vent box (20) contains a pair of partitions (21) each having a tilted plate (22), which provide a pair of vent routes (23). Between the partitions (21) is provided a drive motor (31) and in each vent route (23) is provided a sirocco fan (33) driven by the motor (31) whose blades (33a) are converged toward the motor (31).

Abstract: A system controller continuously monitors the differential pressure between two environments, and dynamically adjusts an air handling system of the controlled environment to maintain a desired differential pressure setpoint by using a closed loop control methodology. Local and remote users can initialize, configure, monitor, and readjust the differential pressure setpoint as necessary. A differential pressure sensor transmits data to the system controller for processing and analysis. The system controller interfaces to a wide variety of air handling systems by using interchangeable air handling subsystems that plug into the controller. Each subsystem has the necessary hardware interface and software control methodology to easily and transparently enable the system controller to interface with a wide variety of air handling configurations.

Abstract: A smoke exhausting device is disclosed. It includes a housing partitioned into two internal rooms. One of the rooms is a bellows for creating pressure, while the other is a guide box for guiding the smoke. The bellows has an entrance communicated with the guide box and an exit communicated with outer side of the housing. The guide box surrounds a front side, right side, left side and a bottom face of the bellows and is spaced from the bellows to define a path for air flow to smoothly pass therethrough. Each of the three sides is disposed with at least one sucking mouth, which is communicated with the entrance. A bottom of the housing is formed with a downward inclined oil guiding section having an oil outlet at bottom end. The housing can be easily disassembled from the funnel and the sucking mouths of the guide box can be disposed at different positions in different directions, so that the smoke exhausting device is applicable to different sites.

Abstract: A movable overhead ventilation assembly is provided for use in a work facility to be positioned in close proximity to a source of airborne environmental material. The ventilation assembly includes a supporting frame located within the work facility. The frame includes a longitudinally-disposed overhead track. A movable chassis is carried by the track. A ventilation housing is carried by the chassis for overhead translational movement of the ventilation housing within the work facility. The ventilation housing includes a plurality of walls, and has at least two openings therein defining respective inlet and outlet zones thereof. An exhaust fan is located within the ventilation housing between the inlet zone and the outlet zone for creating an upwardly moving air stream in the area surrounding the source of airborne environmental material.

Abstract: The invention relates to a hood for the suction and/or the filtration of cooking smokes in a domestic kitchen, having means which allows one, in a simple and rapid way, to direct the air flow sucked from a cooking stove towards a preferred outlet, among a plurality of possible outlets being provided by the hood, and to simultaneously change the operation of the hood from a filtration mode to a suction mode.

Abstract: A laboratory fume hood has a cabinet structure, which defines an enclosed work area, and a primary exhaust assembly. The primary exhaust assembly serves to contain fumes within the work area and then exhaust the fumes. It effects a flow of a volume of air through the work area and in many instances is designed to maintain a constant face velocity across an access opening in the front wall of the fume hood. A secondary collection device is disposed within the fume hood for removing a concentration of fumes from a small portion of the work area. The secondary collection device includes a collector head disposed in the work area and a conduit connected to the primary exhaust assembly. A portion of the air flowing through the work area is directed to the primary exhaust assembly through the secondary collection device. The volume of air passing through the secondary device should not be high enough to adversely affect the containment capabilities of the primary exhaust assembly.

Abstract: An apparatus for venting hazardous effluents from process equipment used in the manufacture of semiconductors, which is part of a larger ventilating system, is a "see-thru" transparent chamber which performs the function of a hood, and can be mounted on any one of the conventional semiconductor processing equipment. Because it is transparent, the operator can easily determine when to clean the hood. This is important from the point of view of not exposing the work piece in the processing equipment to effluent contaminants. Usually, the effluents are hazardous to health. Hence, the apparatus is equipped with a pair of gloves which are an integral part of an access door to the hood, and is used to manipulate remotely cleaning tools that are kept inside said hood: remote in the sense that the operator is never exposed to the hazardous effluents inside the chamber hood, and yet is easily capable of using the cleaning tools inside the hood by means of the pair gloves that are an integral part of the hood.

Abstract: A range hood having a sleek, modern appearance has a keypad and control circuit which enable adjustment of fan speed and light intensity. The range hood includes a keypad having a linear array of keys which may be individually or collectively used to energize the fan at one of a variety of speeds. A control circuit responds to depression of one or a group of two of the keys and in response selects one of a plurality of possible fan speeds. The array of keys is also used in conjunction with a separate night light key to program the intensity of the light for use as a night light. An automatic shutoff key is used to gradually reduce the fan speed until, ultimately, the fan is deenergized.

Abstract: An air cleaning system for treating contaminated air from a mechanical industrial process containing a heterogenous multi-component mixed density fluid (e.g., mist, vapor and/or smoke) that addresses the cloud-like behavior of this contaminated air. The air cleaning system continuously captures a contaminated air volume emitted during operation of the mechanical industrial process and mixes that contaminated air volume with an ambient air volume in order to produce a mixed air volume having certain characteristic temperatures and air velocities. The characteristics of the mixed air volume are controlled such that the mixed air volume does not exhibit cloud-like behavior when transferred via a conduit structure to an air cleaning apparatus or the like.

Abstract: A method for sizing a source capture system for an air cleaning system involves a determination of the maximum dissipated heat energy of an industrial process based upon a horsepower output of any motors used by the process, and a determination of the characteristics and maximum coolant pressure of any liquid coolant and the maximum terminal velocity of the ambient air surrounding the source capture system if the source capture system is at least partially open to ambient air. Using these factors, a minimum air flow velocity of air entering the source capture system is established. This minimum air flow velocity is then used to determine an effective cross-sectional size of the opening of the source capture system based upon a given air velocity volume within the source capture system. By utilizing this method with a preferred embodiment of a structure for the source capture system, it is possible to optimize the size of the openings in the source capture system.

Abstract: A source capture system for capturing contaminated air from an industrial process includes structure both for continuously capturing a contaminated air volume emitted during operation of the industrial process and for mixing that contaminated air volume with an ambient air volume to produce a mixed air volume which is then transferred to an air clean apparatus or the like. The source capture system recognizes that air volumes will exhibit different characteristics traveling through an air treatment system, and that certain of those characteristics such as cloud-like formation and contaminated air volumes having significant gaseous phase vapor components are undesirable and operate to decrease the overall effectiveness of the air treatment system, regardless of what type of technology is used for the air cleaning apparatus.

Abstract: An air cleaning system for treating contaminated air from a mechanical industrial process containing a heterogenous multi-component mixed density fluid (e.g., mist, vapor and/or smoke) that addresses the cloud-like behavior of this contaminated air. The air cleaning system continuously captures a contaminated air volume emitted during operation of the mechanical industrial process and mixes that contaminated air volume with an ambient air volume in order to produce a mixed air volume having certain characteristic temperatures and air velocities. The characteristics of the mixed air volume are controlled such that the mixed air volume does not exhibit cloud-like behavior when transferred via a conduit structure to an air cleaning apparatus or the like.

Abstract: A hood and duct system that is lightweight, easy to install, and has at least four different adjusting points which allow exact placement for optimum operational results. The hoods are made from lightweight, clear polycarbonate so that the operator can view the equipment associated with the hood. The ducts are also made of lightweight material such as polypropylene. Also the hoods have an outwardly extending, bubble-like feature on one side so that the associated equipment can be operated without moving or removing the hood.

Abstract: A moisture-collecting hood assembly (10) for a vapor-generating machine (12) includes a hood (14) having an open bottom (15)and upwardly tapering sides (16) and ends (18). On the inside of the hood is a gutter (24) for collecting moisture in the vapor condensing on the hood interior. Vapors from the machine that enter the hood are exhausted through a horizontally-oriented, moisture-collecting sleeve that has a central portion (46) whose cross-sectional area is larger than that of an inlet (43) in communication with the hood, and an outlet (48) in communication with a negatively pressurized exhaust line (49). The central portion of the sleeve serves to collect moisture in its lower portion that condenses from the vapor exhausted from the hood.

Abstract: An exhaust gas system for receiving and treating exhaust gases from different processing tanks including a hood supported by a moveable crane to direct exhaust gases from a selected tank to a selected exhaust duct. Exhaust gas then flows to a treatment site. A connector system is provided to connect the duct to the hood/crane combination. A flow rate sensor and air admission damper system is provided in association with the duct to sense the flow rate in the duct, to permit the addition of ambient air to the duct, by opening the damper, and thus assure a substantially constant flow rate to the treatment site.

Abstract: An improved fume exhauster includes a housing forming therein a receiving space in which a suction and filtration unit is disposed. Fastened to the lower portion of the receiving space of the housing is a bottom plate having a fume sucking hole and a plurality of air exit holes arranged at a predetermined interval along left, right and front edges thereof. The fume is sucked in through the fume sucking hole of the bottom plate and is subsequently filtered by a filtration member. The filtered fume (clean air) is caused to pass through the air exit holes to form an air curtain under the fume exhauster. The air curtain acts to prevent the dissipation of the fume so as to reinforce the sucking and exhausting effect of the fume exhauster.

Abstract: A drive-through adjustable hood assembly for enclosing a transit mix cement truck during the filling of dry material so as to contain and capture dust and particulate matter. The adjustable hood assembly is mounted on an expanding and retracting frame system. Entrance and exhaust ports are provided in the hood so that a truck can be filled and the resulting dust removed to prevent contamination of the atmosphere. A clam shell type enclosure is thus provided which in the extended open position allows unobstructed access into the adjustable hood assembly and in the retracted closed position provides intimate wrap-around enclosure of the cement truck during filling and dust removal operations. The width of the assembly in the extended open position can be varied by making minor mechanical adjustments to the frame system.

Abstract: A system and method for efficiently and economically providing a sufficient number of air changes per hour to satisfy government recommended standards for proper ventilation of industrial manufacturing facilities. The system is applicable to a building, housing manufacturing facilities and forms an enclosure within the building including the ceiling, floor and certain walls.

Abstract: A ventilation apparatus includes an inlet air device (14), an exhaust air device (15) and a mantle (13), which constitutes a hood where the removable air is collected and wherefrom the removable air is discharged by the exhaust air device (15). The inlet air device includes an air distribution chamber, provided with an air distribution surface in connection with the mantle. A fresh incoming air is brought to the air distribution chamber and distributed through the air distribution surface to the air-conditioned space. The inlet air device (14) is formed of a number of inlet air units (10), which are installed at regular intervals from each other, and each inlet air unit is provided with an inlet surface (5) arranged in connection with the mantle, and an air distribution surface (3) which is projected from the inlet surface (5) and is partly permeable to air.