Abstract: A paint spray filter for use in a paint spray booth. The filter comprises a grid having a plurality of vertical and horizontal members, attachment means secured to the grid extending upwardly and outwardly therefrom, and a sheet of fiberglass filter material. The fiberglass filter material has a first face substantially covering the grid and being secured thereto by the attachment means, and a fully exposed second face. Support means extending from the edges of the grid are adapted to cooperate with the frame members of the paint spray booth for maintaining the paint spray filter in the booth.

Abstract: There is disclosed a readily assemblable, inexpensively manufactured table top air filter of the type having a circulating fan. A unitary housing has sides and a top which defines air outlet openings. The bottom of the housing is open. A fan support assembly mounts readily within the housing where it is retained by stops and latch members which are integral with the housing sides. A replaceable filter is also mountable within the housing in line with the fan-induced air flow.

Abstract: A filter casing for an air conditioning system includes exterior walls (1, 2, 2', 3 and 4) together with a front cover which comprises a plurality of doors (34, 35, 36, 37 and 38). The walls (1, 2, 2', 3 and 4) and doors (34, 35, 36, 37 and 38) form the casing which is divided into two compartments by parallel partitions (9, 9'). Air is drawn through an intake opening (39), through a channel (10) and sequentially passed through a temperature control apparatus (14), a filter (15) and a fan (16). The air is then transmitted through a fan outlet duct (20) to a channel (22). A plurality of absorption filter elements (23) receive the air from channel (22) and serve to remove contaminating agents. After the air is passed through the filter elements (23), it is directed into passageways (40 and 41) which are open to a rear space (42). From the rear space (42) the filtered air is exhausted from the casing through an outlet (30).

Abstract: Vibratory screening apparatus wherein a filtrating cradle incorporating screens is vibrated on a machine base, and wherein a bottom screen (56) in said cradle (12) can be withdrawn between an upper support (64) on said cradle and an intermediate support (54) on a bottom screen frame (52), which frame is also withdrawable from the machine on a lower support (62) on the cradle, hydraulic expander means (60) being provided to act on the lower support so that, in the inserted position of the bottom screen frame, the opposed sides of the bottom screen can be clamped between the upper and intermediate supports, locking the bottom screen and its support in position.

Abstract: An air cleaner suitable for use with motor-bicycles particularly suitable for off-road travelling including an air cleaner element held between a fixed wall of a cleaner casing and an element holder plate mounted in the cleaner casing. The element holder plate is removably mounted in the casing and it is tiltable in the casing so that when the casing is closed by a lid, the element holder plate can be moved from a position in which it facilitates insertion of the air cleaner element to a position in which it positively holds same between it and the fixed wall. The air cleaner mounting structure of the aforesaid construction has the effects of enabling the air cleaner element to be readily and positively mounted and removed and allowing cleaning of the interior of the cleaner casing to be readily effected.

Abstract: A method for converting conventional paint spray booths to booths for accommodating either liquid or powder spray paints comprising removing the conventional waterfall or cloth filter back and substituting therefore an exhaust system, velocity stacks, and a roll away filter cart having replaceable and interchangeable filter elements for filtering liquid or powder paints. The rollaway filter cart may also have a vibrating sheet for directing recovered powder toward the bottom of the filter cart.

Abstract: A compact air filtering device for filtering room air in the home or work environment constructed of a minimum number of unitary structural elements is disclosed, the device having a fan for drawing air through the device encased in detachably interlocked upper and lower enclosure members, one filter positioned on the upper fan enclosure member, and a housing detachably interlocked with the lower fan enclosure member enclosing the filter and the upper fan enclosure member. The device is adapted to receive additional filters identical in construction to the first filter by the addition of an intermediate housing member which increases the internal space within the device without any modification to any of the elements of the device.

Abstract: A housing for mounting HEPA filters includes an open-ended tubular casing (12) and, within said casing, slide structure (24) for slidably mounting a HEPA filter therein from one of the ends of the casing. Baffle means (18) divides the interior of the casing into respective chambers (20, 22) which, on mounting of the filter in the slide structure (24), are gastight isolated from each other except by way of the filter and which are accessible from a respective one of the open ends of the casing. Also provided are gas intake/exhaust ports (46, 48) for each of the chambers (20, 22), a pair of cover members (14, 16) for closing the respective open-ends of the casing (12), each of which cover members (14, 16) includes a flange (94) complementary to the associated end of the casing (12), and respective clamp and seal means (100, 84) for clamping the cover members (14, 16) to the casing to effect gastight engagement of the flanges (94) with the respective ends of the casing (12).

Abstract: A filter assembly for collecting particulate matter from a stream of sample gas. A filter housing having at least an inlet section and an outlet section supports one or more removable filter elements between adjacent housing sections. At least one end of each housing section is provided with a tapered flange whereby it may be joined to the end of an adjacent housing section. Quick-release clamping means engages the flanges to provide a convenient means for fastening and unfastening the sections of the filter housing without dislodging appreciable quantities of the particulate matter collected on the filter elements. The filter assembly may be expanded as required to accommodate any desired number of filter stages.

Abstract: In an air circulatory system (10) of the cab (11) of an earthmoving vehicle it is desirable to have a source of ambient fresh air (A) combined with existing cab air (R) flowing through the air conditioning unit (22). It is common practice to pass both sources of air through one filter which adversely affects the effectiveness of the air conditioning unit 22. When separate filters are provided for each source of air, however, serviceability has often been sacrificed by having the filters placed in a location that is not easily accessible. The air circulatory system (10) of this invention overcomes these problems by providing two filters (30,32) which are cooperatively mounted within an assembly 28 that directs the first ambient source of air A through both filters (30,32) while providing a chamber (90) which mixes the cabin air (R) with the ambient and directs the combined air only through the second filter (32).

Abstract: The invention relates to a process and an apparatus for the replacement of a filter placed between the contaminated area and the uncontaminated area of a vessel.The filter is surrounded by a tightly sealed bag as from the uncontaminated area and this bag is sealingly fixed to the outer periphery of a supporting frame. The filter is removed from the supporting frame and placed on the bottom of the tightly sealed bag, which is welded at two spaced points. The bag is then cut between the two welds so as to obtain a tight diaphragm separating the two areas of the vessel. A supplementary supporting frame is then sealingly fixed to the supporting frame and a new filter is fitted from the uncontaminated area of the vessel. The tight diaphragm is then removed from the contaminated area.

Abstract: A sweeper hopper with a filter assembly is provided. The filter assembly separates the hopper into a dirt and debris-receiving chamber and an exhaust chamber. Air-borne dirt carried through the dirt and debris chamber is trapped by the filter assembly and the air enters the exhaust chamber from which it is exhausted through a blower. A holding frame holds the filter in place against a supporting frame or flanges. The frame has a shaker motor which is periodically operated to clean the filter by vibration. When the filter is to be replaced, the holding frame is readily separable therefrom for rapid replacement, yet the holding frame securely holds the filter in place when the sweeper is in operation.

Abstract: Disclosed herein is a locking mechanism for releasably mounting a row of filter elements in sealing engagement within a filter assembly. The locking mechanism includes a pair of spaced longitudinal bars, substantially semicircular in cross section, which are pivotly mounted within the filter assembly below the lateral edges of mounting plates affixed to the upper ends of the filter elements such that a row of filter elements depend from and are slideably removeable along the longitudinal flat side of the spaced parallel bars. A locking handle is affixed to the outwardly extending ends of each of the parallel bars such that rotation of the handle causes the curvilinear surface of the parallel bars increasingly to bear against the underside of the mounting plate and urge said filter element upwardly into said sealing engagement with an interior portion of the filter assembly.

Abstract: A disposable packet, containing an air freshening medium, and formed with securing elements such that the packet may be positioned and retained in an air stream for removing contaminants and offensive odors from the air and discharging a filtered scented fragrance.

Abstract: A filter construction particularly for vehicles and other spaces closed to the outside comprises a housing which has a filter compartment for containing the filter element with an opening to the compartment. A cover closes the opening and a locking mechanism for locking the cover in the closed position includes a slot defined in a frame portion of the housing and a lever member which is pivoted on the cover. The lever member has one arm portion with a nose which engages into the slot in the locked position and an opposite arm portion which carries a part of a bayonet joint which aligns with a complimentary part on the cover to fix the lever in the locked position. When the bayonet joint is released, the lever may be pivoted on the cover. The lever member has one arm portion with a nose which engages into the slot in the locked position and an opposite arm portion which carries a part of a bayonet joint which aligns with a complimentary part on the cover to fix the lever in the locked position.

Abstract: A clamping device for removably clamping a unit filter cell in position in a gas flow-through housing against a stationary gas flow-through frame structure includes a filter cell support tray selectively movable toward and away from the gas flow-through frame structure, thus, moving a unit filter cell supported on the tray into and out of contact, respectively, with the flow-through frame structure. The tray is moved through a plurality of pivotable levers which are each pivotably attached at one end to a stationary support and connected between its ends to the filter cell support tray. The levers are caused to pivot by means of bars which are connected to the other ends of the lever and are themselves mounted for selective linear movement along their longitudinal axes. Biasing means structurally associated with the pivotable levers cause a uniform clamping force to be applied by the filter support tray forcing the unit filter cell against the stationary support frame.

Abstract: A filter housing having one or more flow-through media support members releasably secured in the housing between the dirty gas inlet and the clean gas outlet to divide the housing into a dirty gas chamber and a clean gas chamber.

Abstract: The bottom wall of a filter housing is provided with a flow opening and the top of the housing has an access opening normally closed by a cover. A partition wall in the housing is provided with a passage to permit a filter to be moved into and out of the space below that wall. The side of the housing has a flow opening below the partition wall. A filter in the housing engages the bottom wall around its flow opening, with the top of the filter spaced below the partition wall passage. The partition wall is provided around its passage with threaded holes, into each of which is screwed a threaded portion of a shaft having a head at its upper end for turning it, and a foot at its lower end beside the filter. The outer end of a push bar is rotatably mounted on the lower end portion of the shaft adjacent its foot, and the inner ends of the bars overlap the top of the filter.

Abstract: A portable gas cleaning unit having a box-shaped housing supporting filters operable to remove particulates, pollens, odors, and smoke from a gas, as air. A motor driven fan located within the housing moves gas through the filters and discharges cleaned gas to the environment outside of the housing. In one form of the invention, the motor is a D. C. motor powered by a 12-volt battery. The filters are mounted in a recess in the top wall of the housing and include a coarse fiber filter and a particulate charcoal filter. A protective open rectangular grid is located over the fiber filter and is mounted with a tight fit on the top wall to hold the filters in the recess. An open top tank is located within the housing for carrying a liquid, as water. Vapor plates mounted on the tank are used to facilitate the evaporation of liquid into the gas flowing through the housing.

Abstract: A filter housing has an access opening for passage of a filter sideways into and out of the housing, the opening being surrounded by an outwardly extending flange surrounded by a flange on a removable door. Inside the housing, at the side opposite its outlet opening, is a pressure bar and a manually rotatable shaft that extends out of the housing beside the door so that it can be turned to actuate means for forcing the bar against a filter aligned with the outlet opening to seal the filter against the housing wall around the opening. Outside of the housing the shaft is provided with a screw thread, on which there is a nut for moving a doorstop into a position where it will prevent closing of the door whenever a filter is not being pressed against the housing side wall by the pressure bar.

Abstract: A cylinder primary air filter element is coaxially disposed within a cylindrical shell between an air intake pipe and an outlet provided in the shell. A resilient secondary air filter element is deformably secured in an opening formed in a sidewall of the shell so as to be located outside the outer periphery of the primary air filter. The secondary filter element is secured in place by a filter element retaining plate which is arcuately shaped so as to be concentric with the primary filter element and is readily detachably attached to the shell. A sufficiently enlarged air flow passageway is thus defined between the outer periphery of the primary air filter element and the filter element retaining plate and consequently the resistance encountered by the air flowing through this passageway may be considerably reduced and the excessive bulging of the air cleaner may be avoided. A reed valve assembly is connected to the outlet of a housing which surrounds the secondary filter element.

Abstract: A latch assembly for removably clamping a unit filter cell in position against a flow-through frame structure includes a shaft spaced from the flow-through frame structure and mounted for rotational movement about its longitudinal axis and for movement transverse to its longitudinal axis toward and away from the flow-through filter frame. The shaft also includes filter cell contacting elements. The shaft is also biased toward the flow-through frame structure. A unit filter cell is disposed between the shaft and flow-through frame structure and is held in place against the frame structure upon rotation of the biased shaft which brings the filter cell contacting elements into contact with the unit filter cell.

Abstract: A filter module has a housing providing a receptacle for a standard filter element, and also has a lateral extension for accommodating securing means to hold the filter element in place. The lateral extension defines a grille opening for removeably receiving an outlet grille in flush relationship, the grille opening extending laterally beyond the receptacle. A seal gasket closes the space between the grille and the filter element, embracing the securing means.

Abstract: An apparatus for separating particulate matter entrained in a gas, as air, from the gas. The apparatus has a housing surrounding a separation chamber. A vane assembly carrying a cylindrical bowl is secured to an upper portion of the housing. The vane assembly has a plurality of circumferentially spaced inclined vanes providing air inlet passages open to the separation chamber for directing the gas and particulates entrained in the gas in a circular motion in the separation chamber. A stack mounted on the bowl forms an annular chamber above the vanes in communication with the inlet of the passages formed by the vanes. An open mesh screen surrounds the annular chamber. An impeller assembly located in the lower portion of the separation chamber has a plurality of arms carrying paddles. The paddles are located in an annular discharge or exit chamber in communication with the lower portion of the separation chamber.

Abstract: A diffuser of the type used in supplying filtered air to a clean work area includes a filter housing within which is supported a filter panel. Gaskets are carried on the upper and lower peripheral surfaces of the panel and an adjustable, resilient clamp operably engages the filter and biases the filter and the upper gasket to form a knife edge seal with a portion of the filter housing. A protective grill assembly is sealingly latched to the housing and also forms a knife seal with the lower gasket on the filter panel. Further, a curtain support member is disclosed which is carried by the grill assembly and seals an isolation curtain airtight to the ceiling.

Abstract: A filter retaining device to prevent a unit filter from inadvertently falling out of a bottom access flow-through housing when the housing is opened to gain access to the interior. Bottom access flow-through filter housings typically include spaced apart elongated channels which slidably receive a unit filter. These channels serve to locate and hold a unit filter in a gas stream passing through the flow-through housing. The filter retaining means is removably attached to the bottom open end of each channel to support the unit filter in the flow-through housing when the bottom access is opened to gain access to the interior of the filter housing.

Abstract: A device for clamping a filter cassette in a filter housing. The filter cassette comprises a frame which releasably mounts a sleeve-type filter element having a common clean-gas opening at the top. The filter cassette slides into the filter housing to underlie a connecting frame and the clamping means operates to press the filter cassette upwardly against the clamping frame. The clamping member includes a pivoted actuator operable, when pivoted, to longitudinally displace rods on the opposite sides of the filter cassette. The rods have a V-shape recess which cooperates with support members so that when the rods are displaced longitudinally the support members rise out of the recess and elevate the rods to effect clamping of the filter element in place.

Abstract: An apparatus supplies to a selected region air laden with a vapor which may be a scent or a masking odor. The device may be controlled to hold the level of vapor in the selected region at a desired value. Provision is made for prevention of the loss of the compound to be volatilized when the device is not in use as well as when in use.

Abstract: The filtration module is adapted to be installed in groups occupying all or a substantial portion of a wall or ceiling area in a room. The filter elements are replaceable from inside the room without disassembly or removal of the housing structure. The filter elements are held in secure sealing relationship against recessed edge surfaces by an easily removed retaining frame normally secured to the housing with fastenings accessible from within the room.

Abstract: A trap accessory, for selective coupling between a suction conduit and an aspirator includes: an elongated housing having a through passage; an elongated retainer slidably received in the housing passage, and having a through passage; and a filter element retained in the housing passage by said retainer. The housing is provided with a coupling nipple for coupling to a complementary coupling orifice in the suction conduit; and the retainer is provided with a coupling orifice for coupling to a complementary coupling nipple of the aspirator. The suction conduit and suction appliance have complementary coupling members, and are adapted to be coupled directly together in the absence of the trap accessory.

Abstract: An exhaust hood with filter apparatus and having at least a fume collection chamber, an exhaust chamber and an interior wall therebetween having an opening therein through which the collected fumes may pass to exhaust. An exhaust filter exchanger is mounted in the exhaust chamber and has at least two filter holders each for holding at least one filter, with one of the filter holders being in an operating position across the opening in the wall between the two chambers and the other of the filter holders being in a reserve position within the exhaust chamber. The filter exchanger apparatus allows an attendant to retract, rotate, and extend the filter holders (and filters therein) to exchange their positions. Spray nozzles are provided within the exhaust chamber to wash the filters held in the reserve position without removal from the hood.

Abstract: This invention relates to improvements in an air-cleaner for internal combustion engines, more particularly, to an improved air-cleaner having such sound-silencing construction that an air-cleaner element is removably fixed in a vibration-isolating cover which is provided in the housing of the air-cleaner.

Abstract: There is disclosed an air lock filter system for separating solids from gases at temperatures up to about 1200.degree. F. wherein the filter element is a rigid porous refractory tube in an air vent for a pressure vessel. The filter element is located so that gas under pressure introduced into the vessel backwashes the filter element.

Abstract: Internal combustion engine exhaust gas muffler and purifier with segmented hollow shell and removable middle segment, said shell having an upstream exhaust gas expansion chamber, a downstream sound-absorbing and sound-collecting chamber, and a middle, removable cartridge receiving housing, the cartridge being filled with small particles of exhaust gas purifying material.

Abstract: An evaporation cooling system for installation within an opening within the wall of a building and having a water conductor provided with spaced openings in the top thereof, retainers spaced apart from each other and extending along the top of the opening, a plurality of brackets spaced apart from each other, retaining clips secured to the brackets so as to extend across the opening below the retainers, a gutter positioned below the retainers, a plurality of support brackets secured to the gutter, a pan provided with openings therein resting on the support brackets, a plurality of individually distinct cooling cells each having front, rear and side faces, the cells consisting of a first group of cells having their bottom portions resting in abutting relationship against the pan and extending along the pan to form a wall, and the front and rear faces of their top portions confined between the retaining clips and the side faces of their top portions confined between the brackets, and a second group of cells hav

Abstract: A filter unit adapted for receiving a flow of fluid potentially carrying particulate material and for holding filters transverse to the flow is disclosed, and in one preferred application of the invention the flow is an air stream containing radioactive particles. The filter unit has a generally cubic-shaped housing having a fluid inlet opening and a fluid outlet opening in two opposite surfaces and preferably these openings are provided with flanges. The housing is also provided in its lateral surfaces with a first opening and a second opening enabling insertion and removal of filters though these openings. The openings are preferably in the same lateral surface or wall. Each opening has a door means mounted to close the opening with each door means being capable of being opened at least 90.degree. to the lateral surface of the housing on which the door means is mounted.

Abstract: A filter mounting assembly for a dual fan airflow system for an air conditioner or the like comprises a pair of spaced-apart fan housings having axially aligned circular inlet openings and a pair of elongated, annular filter elements disposed between the housings and biased by clamping means outward into engagement with annular seating means surrounding the openings in their respective housings.

Abstract: This specification describes a mechanism for clamping an air filter in a vehicle by a floating lever which is actuated by a cranked rod, spring mounted on the vehicle. The spring exerts a clamping force against filter and floating lever ensures force is evenly applied.

Abstract: An air filter unit to be installed in the wall of an air conveying conduit for filtering air as it passes between the conduit and a room includes a frame to mount a flow-through filter over an appropriate aperture in the conduit wall, a gasket between the filter and frame, a gasket between the frame and interior surface of the conduit wall, a frame collar disposed around the periphery of the frame, a clamp which causes the frame and collar to coact in a vice-like manner forcing the frame against the interior wall surface of the duct compressing the gasket therebetween, and a clamp for holding the filter in the frame. The filter unit may further include a pivotally mounted extractor plate disposed inside the conduit to selectively direct a predetermined amount of air through the filter.

Abstract: A method and apparatus for assembling oil filter components is disclosed. The components include a spring guide element which centers a filter element when assembled within a filter canister. Invention is based on the discovery that when the spring guide element is pushed horizontally into the canister by the filter element, the leading edge of the spring guide element automatically slides up the dome shaped bottom of the canister to its proper upright position without need for manual (individual) handling. An assembly machine is also disclosed which provides feed chutes for supplying the canisters, spring guide elements, and filter elements to troughs on a conveyor belt. A stationary bar cam is provided for effecting a force vector in a direction which pushes the filter element and, in turn, the spring guide element into the canister. Alternate embodiments are also disclosed wherein the components may be assembled by centrifugal force, gravity or direct plunger action.

Abstract: An air filter system for an internal combustion engine comprises a caisson which contains a series of superposed compartments containing horizontal, removable filter elements, each of which elements is supported on a wedge-shaped slide which, in turn, is supported on an inclined wall which allows the slide and filter element to be removed from the inlet side of the caisson for replacement of the filter elements. The inclined walls are alternated with horizontal walls, the latter being provided with openings into which the filter elements are inserted, and the entire series of superposed compartments can be formed from a single sheet of metal bent into a zig-zag configuration.

Abstract: A needle valve for use in the idle port of a carburetor, said needle valve having a cap retained foam filter covering an otherwise unobstructed passage extending axially compltely through the needle valve to permit moving air at atmospheric pressure, 14.7 pounds per square inch and at a speed of about 400 feet per second more or less passing through said passage to drive fuel passing through the idle port into the throat of said carburetor away from the walls of the throat, the needle valve being threaded into the carburetor housing and retained by a nut and lock washer.

Abstract: A new filter cell which has particular utility in an isokinetic in-stack particulate collection system can be inserted directly into standard three-inch or four-inch portholes which are prevalent in the stacks which are to be tested. The filter cell is attached to a probe, both of which are inserted into the stack so that a fluid containing the particulate enters the filter cell parallel to a fiber filter which is contained therein. The fluid passes downward through the filter fiber and then exits the filter cell parallel to the fiber filter through an outlet port, leaving the particulate matter trapped in the filter.

Abstract: A gaseous or liquid sampling collection unit designed to prevent loss of any of the matter collected and designed to prevent the accidental or intentional loss of all or part of the amount of matter collected, consisting of a filter capsule comprising a shield, and a filter, a two piece cassette containing said capsule consisting of an upper member and a close fitting lower member wherein the capsule is positioned between the upper and lower members of said cassette, the upper member of said cassette containing a valving arrangement permitting a unidirectional flow and, a tamper proofing plate preventing the accidental or intentional interference with the collection function.

Abstract: An odor masking ashtray is constituted by an ashtray provided with openings in its side for the insertion of cigars, cigarettes and pipes serving as a base supporting a housing in which is mounted a fan positioned between two filters so that smoke and other objectionable odors may be drawn upwardly from the ashtray through the filters and in the process filtered out of the air and/or masked.

Abstract: A coiled latch for locating and holding a filter in a housing has two coaxially disposed turns preferably in the form of a conical helix, the smaller of the turns exerts a force on the filter holding it into the housing, while the larger of the turns abuts the peripheral margin of the filter to center it in the housing.

Abstract: An air cleaner is described for removing airborne contaminants in a room. The air cleaner includes a housing defining a linearly elongated duct in which is mounted, in stated order, a low efficiency filter, a high efficiency filter, and a blower. Suitable baffling is mounted to the housing to isolate the intake and discharge orifices of the blower and the blower is oriented to discharge air from the duct in a direction substantially coinciding with the direction of flow of air through the duct.