Abstract: A filter/drier for receiving and discharging a flow of refrigerant having a header with an inlet passage forming a plenum and an outlet passage through the header. A louvered baffle plate has peripheral tabs crimped over an annular flange on the header to form a subassembly. A cup-shaped shell containing desiccant, with a layer of fibrous filter material over the desiccant, is assembled over the header subassembly and sealed to the header by weldment. The peripheral spaces between the crimped baffle tabs provide exclusive flow dispersion to an annular collector space in the header which communicates with the outlet passage.

Abstract: A filter device for compressed air in which the filter packings can be easily and quickly replaced. A first packing is accommodated in a first sleeve, a second packing is accommodated in a second sleeve, and an inlet passage portion defines an inlet passage for introducing compressed air from the exterior to the first sleeve. A guide passage portion defines a guide passage for guiding compressed air from the first sleeve to the second sleeve, and an outlet passage portion defines an outlet passage for discharging the compressed air out of the second sleeve to the exterior. The first and second sleeves, the inlet passage portion, the guide passage portion and the outlet passage portion are integrally formed of a synthetic resin, thus forming a unitary body for the filter device. The body contains access openings through which the first and second packings are independently removable, and a closure member is removably attached to each access opening to close the access opening and provide fluid-tightness.

Abstract: A full-flow fluid filter assembly is provided including a large pore size screen disposed in series with a relatively smaller pore size screen, together with a device responsive to obstruction of the smaller pore size screen to cause substantially all of the fluid flow to pass only through the large pore size screen. The arrangement is such that during use the fluid passes through both screens and, during bypassing of the smaller pore size screen, passes through at least the larger pore size screen. The device may be a one-way valve adapted to respond to increased back pressure developed across the small pore size screen. Preferably, the small pore size screen is provided with a shield or baffle adapted to minimize direct impingement of the fluid flow on the small pore size screen with the result of entrainment of debris from the small pore size screen during bypassing of this screen.

Abstract: A system which reduces the transmission of noxious fumes into the surrounding air during the application of a heated liquid roofing product on a roof. A mobile tanker or kettle contains a supply of the heated liquid. The air space within the tanker or vessel above the liquid product communicates with a mobile filtration unit by a first duct. A rooftop carrier for the liquid product has a fume collection hood which communicates with the filtration unit by a second duct. A blower in the filtration unit creates negative pressure which draws the noxious fumes from the tanker or vessel and carrier through the ducts and into and through the filtration unit. The filtration unit has a series of airtight chambers mounted on a mobile truck bed, each containing a different type of filtering medium to remove various components of the noxious fumes as the fumes move through the filtration unit.

Abstract: The invention provides a vacuum cleaner (100) including an airflow path, dirt and dust collecting device arranged in the airflow path, a motor or fan unit (110) for causing air to flow along the airflow path and also arranged therein, a first filter (112) arranged immediately upstream of the motor or fan unit (110) and a second filter (114) arranged downstream of the motor or fan unit (110), wherein the arrangement is such that, when in use the dirt and dust collecting device are made accessible or removed for emptying or replacement, both filters (112, 114) are visible to the user. This arrangement encourages the user of the vacuum cleaner to regularly maintain both filters (112, 114), thus improving the performance of the vacuum cleaner (100).

Abstract: A grease filter system for use in connection with retaining viscous products of combustion in commercial food preparation environments includes a receptacle and a filter element removably supported within the receptacle. The receptacle has a lid covering one end thereof and a bottom. The lid includes an opening through which grease, condensed steam, water and other products of combustion enter the system. The receptacle further includes a plurality of apertures disposed spaced from the bottom about the perimeter of the receptacle such that the filter system retains grease and other viscous fluids while allowing condensed steam, water and other products of combustion to pass through the filter element and the receptacle out through the apertures.

Abstract: A mobile vessel which reduces the transmission of noxious fumes into the surrounding atmosphere emanating from material contained in a material chamber in the vessel, such as bituminous roofing material. An air plenum extends along the vessel beneath a filtration unit and receives noxious fumes from the material chamber and from an outside source through ducts. Ambient air is mixed with the fumes for cooling the fumes upstream from the filtration unit. A heater and stirrer are located within the material chamber for uniformly heating the material. A power operated ram and heated breaker bars move and break a solidified key of the material for subsequent discharge into the material chamber. A blower creates a negative pressure in the air plenum and filtration unit for moving the fumes and ambient cooling air therethrough.

Abstract: A vacuum cleaner having a reduced velocity chamber with a high velocity air inlet, an electric motor, a rotary mechanism driven by the motor for creating a vacuum in the chamber, an outlet for exhausting air from the chamber, which air flows in a selected path from the air inlet, through the chamber and out the air exhaust outlet and a disposable porous sheet filter layer in the chamber for removing solids particles from the air. The vacuum cleaner also has a fiber filter between the filter layer and the motor where the fiber filter has an electrically charged non-woven material for removing very fine air particles in the chamber, intersecting the air path and generally coterminous with the disposable filter layer.

Abstract: A system which reduces the transmission of noxious fumes into the surrounding air during the application of a heated liquid roofing product on a roof. A mobile tanker or kettle contains a supply of the heated liquid. The air space within the tanker or vessel above the liquid product communicates with a mobile filtration unit by a first duct. A rooftop carrier for the liquid product has a fume collection hood which communicates with the filtration unit by a second duct. A blower in the filtration unit creates negative pressure which draws the noxious fumes from the tanker or vessel and carrier through the ducts and into and through the filtration unit. The filtration unit has a series of airtight chambers mounted on a mobile truck bed, each containing a different type of filtering medium to remove various components of the noxious fumes as the fumes move through the filtration unit.

Abstract: A collection apparatus for collecting oil or other liquids forcibly removed from a dirty item by directed air pressure includes a generally cubical metal receptacle having a wooden cover. The dirty item is placed in a duct-like construction in a front side of the apparatus and a source of air pressure is used to remove oil or other liquids from the item, thereby producing mist. This mist is directed into the apparatus and travels to a far side of the apparatus, where it strikes a deflector. The deflector directs the mist to either of two sides of the apparatus. A suction unit, located in a bottom side of the apparatus, pulls the mist downward through a filter and finally into a collecting container.

Abstract: A grease filter assembly is provided for absorbing grease discharged from a spout of a grease discharge vent extending from a roof. A support frame is mountable to the duct of the grease discharge vent and a grease absorbing pad is supportable upon the support frame in stationary position below the spout and in spaced relation from the roof. The support frame includes support rods mounted adjacent respective sides of the discharge vent duct and can extend beyond their respective duct sides to overlap at two corners of the duct to provide a supporting grid including the end portions of each of two rods extending from two corners of the duct. A grease absorbing pad is supported on the supporting grid disposed adjacent a side of the duct. The pad can be of sufficient length to extend beyond the duct side on both ends.

Abstract: An apparatus for collecting grease from a kitchen ventilator, which is mounted on the roof of a structure housing a restaurant. The apparatus fits around the exhaust fan of a kitchen ventilator and includes at least one layer of filtering medium which fits snugly about the exhaust fan, a rectangular frame for securing the layer of filtering medium about the exhaust fan, and a plurality of retaining bars for securing the layer of filter medium in the rectangular frame. The rectangular frame is comprised of four frame sections joined at each end with 90.degree. elbows. Each frame section comprises three tubes with supports fitted between the tubes. The 90.degree. elbows fit over and join the tubes of one frame section with the tubes of another frame section. The retaining bars are positioned between two tubes of opposing frame sections, above the layer of filtering medium.

Abstract: A grease filter assembly is provided for absorbing airborne grease discharged from a grease discharge vent extending from a roof. A support frame is mountable to the duct of the grease discharge vent and grease absorbing pads are supportable upon the support frame in stationary position surrounding the discharge vent and in spaced relation from the roof. The support frame includes support rods mounted adjacent respective sides of the discharge vent duct and extending beyond their respective duct sides to overlap at the corners of the duct and thereby provide a supporting grid including the end portions of each of two rods extending from adjacent walls of the duct. A plurality of grease absorbing pads are supported on the supporting grid disposed adjacent respective sides of the duct. The pads being of sufficient length to extend beyond the duct sides on both ends so that pads disposed at adjacent sides of the duct overlap one another at the corners of the duct.

Abstract: Portable vacuum and air filtration units including a plurality of separately transportable modules are disclosed. Some units include a mechanism for locking the modules together during use, an air inlet located in one of the modules, a debris screen and a mechanism for receiving debris stopped by the screen located in one of the modules, an electrostatic filter located in one of the modules, a bag filter assembly located in one of the modules, a HEPA filter assembly located in one of the modules, and a mechanism for drawing a substantial volume of air through the inlet, screen, electrostatic filter, bag filter assembly and HEPA filter assembly. Other units include a pliable, tubular mesh for filtering debris.

Abstract: Constructions and methods are described for collecting particulate material from gas streams. In one specifically described arrangement, a region of depth media is oriented upstream of a second region of depth media. A surface loading media is positioned downstream from the second region of depth media. In an alternate embodiment, a further region of filter media is positioned downstream from the surface loading media.

Abstract: An air filter includes an inlet for compressed air, a prefiltration chamber into which air from the inlet passes, a porous filter through which air from the prefiltration chamber passes to strain particular matter from the air, a plurality of venturis through which air from the porous filter passes, an expansion chamber in which air from the venturis expands and cools so that droplets of oil and water precipitate and accumulate at the bottom of the expansion chamber, and an outlet for air from the expansion chamber.

Abstract: A filter device for compressed air including first and second filters, wherein the first filter is free from a variation in the filtering efficiency, and does not require periodic replacement of its packing, leading to a reduced maintenance cost of the first filter. The first filter is adapted to separate the liquid and solid particles from the compressed air passing therethrough, while the second filter is adapted to remove or eliminate any residual liquid and solid particles remaining in the compressed air passing therethrough.

Abstract: A filter cover for an air cleaner assembly of an internal combustion engine. The filtering cover is composed substantially of filtering material which filters air as the air is drawn through the filtering cover and into the air cleaner assembly. The filtering cover greatly increases the air filtering surface area of an air cleaner assembly resulting in improved performance and operation of the engine.

Abstract: An air intake protection device includes a deflector for directing polluted inlet air in a cyclonic motion as it enters a pollution chamber forcing heavier pollutant particles toward the inside wall of the pollution chamber, causing them to fall into a debris collection chamber. Lighter pollutant particles are engaged by a non-planar filter and a second, final filter. Clean, filtered air is thereby forced through a clean air chamber to an air outlet which communicates the clean, filtered air from the device housing.

Abstract: A grease filter and collection assembly for roof ventilators and the like includes a frame structure having a generally central aperture through which a grease discharge vents projects when the frame structure and trap assembly are installed surrounding the vent, and a replaceable grease-trapping material is removably secured in the frame structure so that the grease-trapping material is exposed vent. In a preferred embodiment, the frame structure is assembled from extruded frame members which integrally include a plurality of channels for securing and mounting the assembly for retaining the grease-trapping material within the frame structure. Upper and lower channels accommodate corner connections of the frame members. The frame members have side walls which peripherally enclose the grease-trapping material which is tucked between the upper and lower channel inwardly extending from the side wall.

Abstract: An air handling and filtering system is provided for with conventional textile machines. The apparatus includes a common vacuum system for drawing first and second independent airstreams through the textile machines. A filtering system operates with the vacuum system to filter the useful white waste fiber material from all of the first airstreams. Individual filtering devices are provided for each textile machine and are housed in end-housing units disposed as one end of the textile machine. The individual filtering devices filter generally waste fiber material from the second airstreams drawn through the textile machines. The individual filtering devices can be isolated from the common vacuum system so that the individual waste fiber filters can be cleaned without stopping or otherwise affecting the critical first airstream so as not to detrimentally affect yarn formation at the spinning stations of the textile machines.

Abstract: An apparatus and method for filtering compressed air has an inlet to admit a flow of compressed air, a filter where the compressed air is cooled and water vapor is coalesced therefrom, an area downstream of the filter where the compressed air is passively warmed when the temperature of the surroundings is higher than the compressed air passing therethrough, and an outlet for discharging the flow of compressed air. The compressed air is passively warmed in the area downstream of the filter in order to increase its moisture retaining capacity. This is done to inhibit or reduce condensation of water from the compressed air which would otherwise cause corrosion in airlines, valves, and pneumatically operated devices through which the compressed air travels.

Abstract: An oil flooded screw compressor including suction, rotor, and discharge sections having suction, intermediate pressure, and discharge ports, respectively, and an oil sump. The discharge section includes radially spaced internal and external housings, with the internal housing receiving an oil-gas stream from the rotor section. A filter is disposed to surround the internal housing, with the filter including a cylindrical, foraminate body portion, an end wall, and a filter pad against the end wall. The oil-gas stream from the rotor section exits the inner housing, via an opening which forms part of a first stage of oil removal. The oil-gas stream strikes the filter pad, removing oil as the oil-gas stream is forced to turn 90 degrees to exit the filter through the foraminate body portion, which also removes oil. The filter functions as second and third stages of oil removal.

Abstract: Oil separator assembly for removing and collecting oil entrained in a gas includes a vessel having a cavity with a reservoir formed therein; an inlet pipe extending into the vessel; an inlet diffuser securely attached to the inlet pipe for initially separating the entrained oil from the refrigerant gas; and independent oil and gas outlet ports extending from the vessel for emitting the separated oil and ejecting the substantially oil-free refrigerant gas, respectively. The inlet diffuser includes a conical-shaped hollow member having an open base, a closed end, and a converging side wall extending from the open base to the closed end. Refrigerant gas and entrained oil, received through the open base, gradually impacts on the inner surface of the side wall in a manner sufficient to promote coalescence of the oil. The coalesced oil is directed across the inner surface of the side wall transversely away from the refrigerant gas.

Abstract: A portable vacuum and air filtration unit, comprising: a plurality of separately transportable modules and a means for locking the modules together during use, an air inlet located in one of the modules, a debris screen and a means for receiving debris stopped by the screen located in one of the modules, an electrostatic filter located in one of the modules of some embodiments of the invention, a bag filter assembly located in one of the modules, a HEPA filter assembly located in one of the modules, and a means for drawing a substantial volume of air through the inlet, screen, electrostatic filter, bag filter assembly and HEPA filter assembly.

Abstract: A grease filter and collection assembly for roof ventilators and the like includes a frame structure having a generally central aperture through which a grease discharge vent projects when the frame structure and trap assembly are installed surrounding the vent, and a replaceable grease-trapping material is removably secured in the frame structure so that the grease-trapping material is exposed within the aperture for trapping grease discharged from the vent. In a preferred embodiment, the frame structure is assembled from extruded frame members which integrally include a plurality of channels for securing and mounting the assembly for retaining the grease-trapping material within the frame structure. Upper and lower channels accommodate corner connections of the frame members. The frame members have side walls which peripherally enclose the grease-trapping material which is tucked between the upper and lower channel inwardly extending from the side wall.

Abstract: A hubcap for a wheel is disclosed and is comprised of a generally cup-shaped member adapted to be secured to a wheel to prevent contaminants from entering the wheel bearing. The hubcap has a vent opening formed therein which has a cylindrical plug inserted thereinto and which is comprised of a bronze powder material. The cylindrical plug is impervious to water and other contaminants so that the water and other contaminants may not enter the interior of the hub cap. The cylindrical plug does permit the passage of air therethrough so that excessive pressure within the hubcap may be vented.

Abstract: An air purification apparatus for pneumatic systems utilizing a water trap, a precooler, and a three-stage purification apparatus having filtration means, an air cooling chamber for moisture condensation, and a plurality of moisture traps, all in a compact, efficient package. The purification apparatus automatically purges collected moisture in response to the compressor duty cycle.

Abstract: An in-line filter device including a partition member, and a lower housing and an upper housing which are held in a fluid communication with each other through at least one intermediate passage formed through the partition member. The lower housing has a radially inner and a radially outer filter having respective packings, for separating vapor and/or liquid particles in compressed air, and accommodates a draining device for discharging the trapped vapor and/or liquid particles. The upper housing has a mist filter of an annular porous structure for further separation of the remaining vapor and/or liquid particles in the compressed air, and an air collector disposed inside the mist filter, for delivering the filtered air.

Abstract: An air purification unit including a housing of substantially rectangular solid configuration and having an inlet and an outlet, a diagonal partition in the housing dividing it into substantially equal inlet and outlet chambers, first filters in communication with the inlet chamber for removing gases and particulate matter entering the inlet chamber, second filters in communication with the outlet chamber for removing submicron particles, and a specialized motorized impeller mounted on the diagonal partition for moving air from the inlet chamber to the outlet chamber, the motorized impeller including a stationary inlet ring secured to the partition, a stationary motor housing portion fixed relative to the partition and a rotatable motor housing portion carrying a backwardly rotatable impeller wheel for drawing air through the center of the impeller wheel as it rotates and forcing it radially outwardly through the impeller wheel to thereby pressurize air in the outlet chamber.

Abstract: This invention is a filter assembly for preparing gases for an exhaust gas analyzer. A single housing includes at least three filter cavities, an inlet passage and two outlet passages. A coarse filter for filtering particlate matter and for condensate condensation is disposed in the first filter cavity. Condensate from the first cavity drains into the second filter cavity which has disposed therein a fine filter for filtering condensate. An outlet passage is connected to the second filter cavity for withdrawal of the condensate. A fine filter for filtering the exhaust gas is disposable in the third filter cavity which is coupled to the first filter cavity. A second outlet passage connects the third filter cavity to a pump for removal of the gas to be analyzed. The present invention thus provides a multiple filter assembly in a single housing with large fine filter area, minimal void volume, minimal interconnections, and convenient access to the individual filters.

Abstract: The present invention relates to engine manufacture. An air cleaner which comprises a housing (1) with an air-supply pipe (2) forming an annular clearance (3). A main filtering member (5) is placed in the clearance (3) and in close vicinity to the opening (13) of the air-supply pipe (2) and additional filtering member (14). According to the invention the filtering member (14) has a recess (15) which is coaxial to the pipe (2) on the surface (16). The size of the recess (15) on the surface (16) is greater than the diameter of the pipe (2).It is preferably to use the air cleaner in an engine operating in unfavorable conditions with vapors of oil and soot.

Abstract: A method to detect, measure or remove trace amounts of condensible vapors in compressed gases. The concentration of droplets detected, measured or removed may be as low as part per trillion. The compressed gas comprising a carrier gas and condensible vapors is discharged through a critical orifice in order to condense the vapors in the form of homogeneous droplets. The droplets are either detected, or their concentration measured or removed from the expanded carrier gas.

Abstract: In-line filter device including a first and a second filter disposed parallel with each other on a trap structure such that the filters communicate with a trap chamber defined in the trap structure, so that water and/or oil vapor contained in compressed air flowing through the first filter are coalesced into droplets, which are captured in the trap chamber, while any remaining liquid particles in the air are vaporized during passage through the second filter. The device has a reduced-pressure sump in the bottom portion of the trap structure, and inlet holes through which the captured liquid flows from the trap chamber into the sump such that an upper open end of the tube is positioned in a flow path of the air between the trap chamber and the second filter, for sucking the atmosphere in the sump toward the second filter. A draining device is provided in the bottom portion of the sump, for discharging the liquid out of the sump.

Abstract: A filtering device for removing liquid particles from air streams of air compressors comprising a housing with an open side of which the interior is partitioned into three successive compartments, a lid which seals the housing, two filter layers which are constituted by a perforated plate and a filter sheet made of suitable filtration material, and a vane-type impeller which is rotated by the pressurized air from an air compressor to help moving the air through the filter layers. Between any two successive compartments, an air passage is formed with one of the filter layers fixed therein to remove liquid particles, such as water and oil particles. The removed liquid will be stored in reservoirs and then drained off.

Abstract: An improved apparatus for separating impurities from a stream of forced air by gravitational and centrifugal forces subjecting the air stream through a mesh coalescer to coalesce micro impurities of moisture or oil into large droplets which are forced through a helical passaway to condense into liquid. The separated liquid flows downwardly through a liquid protective unit into a liquid storage trap at the bottom of the device. The separated liquid when in the protective unit is free from the moving stream of forced air as latter swirls upwardly into an air filter and escape from an outlet port. The air stream once passed through the mesh coalescer, helical conduit and air filter is substantially free from any impurity.

Abstract: An inverse flow depth filter assembly includes an elongated, generally elliptical housing with gas inlet and egress means, and a bottom drain. A filter cartridge is suspended from the housing top so that an annular channel is created between the housing and the cartridge. The cartridge has passages at the top, leading to the egress means and an open bottom. Air enters the housing and is channeled downward through the annular channel until it reaches the cartridge bottom, quiets the turns upwardly through the filter. Heat exchange apparatus cools the down-flowing air and promotes condensation of the water. The heat exchange apparatus can include a plurality of fins fixed to the exterior of the housing to promote heat exchange with the surrounding atmosphere. Heat exchange fins disposed internally at the annular channel promote heat exchange between the flowing air and the housing. The fins increase the contact surface area for better heat exchange with the outside air.

Abstract: The air in which the oil particles are suspended is drawn from the environment through an air intake (4) as a result of the vacuum created by a centrifugal aspirator (11) and then passes along a substantially vertical duct (5) in which an internal helical element (6) causes the mechanical separation of the oil particles by centrifugal action due to the rotation of the air imparted by the helix, the oil particles collecting on the wall of the duct (5) from which they drain into a collecting hopper (2), after which the air is further filtered by an additional filter (9, 10) before reaching the delivery opening (13).

Abstract: A modular filter assembly for filtering compressed air includes a cartridge housing and a self-contained filter cartridge positionable in the housing. A manifold cap is attachable to the housing to conduct a compressed air stream between an air line and the filter cartridge in the housing. The filter cartridge includes a multistage filter and a quiet zone between filter elements therein.

Abstract: A portable room air filter includes a cabinet with an open bottom. A blower mounted atop a filter chamber is located at the bottom of the cabinet. The filter chamber receives one or more air filter modules. The air filter modules may include a filter media layer having opposed major surfaces and baffle members for directing air flow generally parallel to the major surfaces.

Abstract: A muffler purifying device for combustion gases of general application including an expanded external casing having anterior and posterior end intakes equipped with nozzles, one connected to the exhaust pipe and the other for discharging gases, between which is included a unit of elements for retaining impurities and purifying the gases in the form of a cartridge which is removable from the external casing through an aperture located at the posterior end, equipped with a removable cover. The removable cartridge has a tubular wall with its own anterior end intake having an aperture defining an internal nozzle into which the exhaust pipe extends.

Abstract: A filter device including an intermediate sleeve, an upper and a lower cap closing the upper and lower ends of the sleeve and cooperating with the sleeve to define an upper and a lower volume on opposite sides of an inner partition wall, and an inner tube disposed in the lower volume so as to extend from the partition wall and cooperating with the lower cap to define an inner space and an outer space which communicate with each other through a bottom space formed below the inner tube. The lower volume communicates with the upper volume through the inner space. The sleeve has an inlet port communicating with the outer space and receiving an incoming compressed air, and an outlet port communicating with the upper volume for discharging the air. The outer space is filled with a first packing. A porous structure is accommodated within the bottom space, for trapping droplets from the compressed air flowing through the first packing.

Abstract: A multi-stage entrained liquid-gas separator includes a housing divided into upper and lower chambers. The lower chamber is provided with a tangential gas-liquid stream inlet into an annular chamber in which the large entrained liquid drops are centrifugally impinged upon the chamber wall and drained into a lower sump. From the annular inlet chamber the gas-liquid stream is caused to abruptly change direction and flow into a lower-pressure area of the lower chamber for further releasing entrained droplets. From this area the gas-liquid stream is made to flow into an inner chamber provided within the lower chamber and communicating with the upper chamber. A preseparator housed in the inner chamber separates by impingement and coalescence liquid droplets still entrained in the gas-liquid stream and drains the coalesced liquid into an inner sump which in turn drains via a trap into the lower sump.

Abstract: An in-line air purifier for removing water, oil and carbon monoxide from a compressed air stream comprises a two-stage assembly in which the first stage includes replaceable cartridges for promoting coalescence of water and oil into droplets and removing such droplets from the air stream. The dried air is then routed to a second stage where it is passed through a replaceable cartridge containing a bed of activated charcoal for removal of odor-causing matter, and then through a further replaceable cartridge containing a bed of catalytic pellets which function at room temperature to remove carbon monoxide. The resulting purified air is routed through a manually adjustable pressure regulator to a purifier outlet.

Abstract: An in-line filter device including a double-walled tube filter assembly, and an upper cap and a lower cap which are held in communication with upper and lower open ends of the filter assembly. The filter assembly has an inner tube and an outer tube which are disposed in radially spaced, and coaxial relation with each other, so as to define an annular space therebetween. One of the inner tube and the annular space is filled with a first pad adapted to coalesce vapor in compressed air passing therethrough, into droplets, while the other of the inner tube and the annular space is filled with a second pad adapted to vaporize residual liquid particles remaining in the compressed air which has passed the first pad. The upper cap has an inlet connected to the upstream side of a compressed air conduit and communicating with the first pad incorporated within the double-walled tube filter assembly. The upper cap further has an outlet connected to the downstream side of the conduit and communicating with the second pad.

Abstract: An inverse flow depth filter assembly includes an elongated, generally elliptical housing with gas inlet and egress means and a bottom drain. A filter cartridge is suspended from the housing top so that an annular channel is created between the housing and the cartridge. The cartridge has a plugged top and an open bottom. Air enters the housing and is channeled downward through the annular channel until it reaches the cartridge bottom. Air then enters the cartridge bottom to flow in an upward vertical pattern through the filter element. The filtered air then passes through ports in the plug and exits the housing through the gas egress means.

Abstract: Oil separation for a horizontal refrigeration screw compressor is achieved in a series of steps which achieves nearly oil-free refrigerant gas. The refrigerant is discharged from the compressor into a generally cylindrical shell which is divided into three chambers. A generally horizontal, but slightly tilted, divider plate unequally divides the cylindrical shell into two chambers for the greater portion of the cylindrical shell. A cylindrical chamber at the end of the cylindrical shell provides fluid communication between the other two chambers. The compressor discharge is located in the lower and larger chamber which is a segment of a circle portion which also contains the oil sump. A discharge deflector turns the compressor discharge flow at least 90.degree., but as much as 135.degree., and causes it to impact upon the lower surface of the divider plate and depositing oil thereon. The flow striking the divider plate is deflected 180.degree. and is caused to turn approximately 90.degree.

Abstract: A cyclone dust collector is comprised of a lower dust chamber (5) having a tangential air inlet (10) and an upper dust chamber (4) in combination with a suction device. A dividing plate separates the upper and lower dust chambers from one another. A communicating duct (2) is installed in the dividing plate (3) in such a manner to extend downward into the lower dust chamber (5), and a cyclone drum (15) is supported in such a manner to enclose the dust (2). A disk (17) is supported to vertically divide the inside of the drum (15) into a pair of upper and lower parts. The air introduced into the lower dust chamber (5) is caused to flow in a swirl in the cyclone drum (15), the dust particles in the air are separated by centrifugalization to be allowed to drop along the inside wall of the drum (15) and the separated dust particles fall onto the bottom of the cyclone drum (15) without being affected by the swirling flow.

Abstract: An in-line vapor trap for removing water and/or oil vapor from a compressed air line which includes a manifold having spaced coaxial inlet and outlet openings, a hollow base suspended from the manifold, and replaceable cartridges connecting the manifold inlet to the hollow base and connecting the hollow base to the manifold outlet. A honeycomb structure is disposed in the lower portion of the base within the enclosed volume defined thereby and cooperates with the base side and bottom walls to define a zone of substantially zero air movement for collection of liquid droplets. A depression in the base bottom wall forms a liquid sump, and a drain opens into the sump for drainage of captured liquid. This drain features a continuously open annular orifice for continuous weep-drainage of liquid under pressure. The orifice surrounds a wire having an angulated head disposed within the sump which may be rotated by an operator so as to remove dirt and debris from surrounding and clogging the annular weep orifice.

Abstract: A low profile chemical biological air filter, comprising a frame having a rst end for attachment to a mask and having an upwardly facing surface defining an inlet for the filter. The frame has a length sufficient to space first and second filters from the inlet to the attachment first end and a width sufficient to enclose the two filters. Its thickness is no greater than that necessary to contain only one of the two filters to minimize the thickness of the frame by placing the two filters side by side. The filters include a HEPA filter for removing particulate material from the air and a Whetlerized charcoal filter bed for secondary filtering of the air. The HEPA filter is supported in the frame at the inlet as is the charcoal filter bed along with a fines filter for protecting from dust which may be dislodged from the charcoal filter bed.