Abstract: A head cover structured and arranged to cover at least part of a face of a cylinder head of an internal combustion engine is described. The head cover includes a chamber formation part structured and arranged to provide a chamber to restrain sound propagating through air from the cylinder head. The chamber formation part includes a partition part for partitioning the chamber from a space on a cylinder head side. The partition part has a convex part projecting into the chamber, and a through hole may be provided in the convex part that penetrates from the space on the cylinder head side to the chamber.

Abstract: Cutting insert with a cuboid body has a substantially square top face and bottom face, said top face and bottom face connected by four peripheral adjoining side surfaces. At least two cutting edges are formed at the transition of the top face to at least two side surfaces, that cutting edges defining a plane of the top face. To provide a cutting insert and a corresponding tool suited to produce valve seat surfaces with high precision but still having a rather simple construction and being precisely mountable with ease and less efforts of adjustment, the plane defined by the top face cutting edges of the cutting insert has maximum dimensions of 7 mm×7 mm, where the bottom face has a supporting surface formed exactly parallel to the plane defined by the top face cutting edges by means of grinding within a tolerance of less than 5 angular minutes.

Abstract: An apparatus 50 for coalescing particles of a first fluid entrained in a flow of a second fluid is described. Apparatus 50 comprises a housing 52 and an enclosure 54 formed in the housing, the enclosure 54 defining a longitudinal axis x-x. The enclosure 54 has at least one curved wall 56 arranged to direct fluid flow along the curved wall 56 in a curved path. A first inlet duct 60 is provided at a first location along the longitudinal axis x-x for enabling introduction of a fluid flow substantially along a tangent to the curved wall 56. The first inlet duct 60 defines a first channel 58 along which fluid flow is directed. The first channel has a decreasing cross-sectional area along the direction of fluid flow shown by arrow Y. An outlet 62 from the enclosure 54 is provided at a second location along the longitudinal axis x-x.

Abstract: A water separator reduces a water content of an air stream, which is used in an HVAC unit for a vehicle. The water separator includes a diverter wall and an adjacent wall spaced from the diverter wall to define an air passage. The diverter wall has a terminal end extending into the air passage for changing a direction of the air stream flowing through the air passage to separate water droplets from the air stream to reduce the water content of the air stream. A gutter is coupled to the terminal end of the diverter wall and extends into the air passage. The gutter defines a drainage channel configured to receive the water droplets that form on the diverter wall for preventing the water droplets from reentering the air stream flowing through the air stream passage.

Abstract: This invention relates to an in-situ cleaning fixture for mist removal separator vane assemblies. The cleaning fixture includes an injection chamber with an inlet and a perforated plate which extends horizontally, substantially over the length of the mist removal separator vane assembly. A cleaning fluid source is connected to the injection chamber during a cleaning process. The injection chamber is designed to receive the cleaning fluid, pass the cleaning fluid through the holes formed in the plate, downwardly along a plurality of vanes in the mist removal separator vane assembly and into the drain trough. The in-situ cleaning fixture facilitates removal of scale build-up from the mist removal separator vane assembly and thereby restores the efficacy of the vanes.

Abstract: Moisture separator configuration for separating water droplets from steam of a flow having a mixture of steam and water droplets, such that the cited flow travels through the moisture separator configuration so that this separation is achieved. The moisture separator configuration includes a plurality of plates oriented in line with the flow. The plurality of plates form channels through which the flow travels. The channels have progressive cross section variation along the flow direction, in order to collect progressively the water droplets separated from the steam in the flow.

Abstract: A trapping device that traps a particle in a vacuum atmosphere includes a plurality of grooves arrayed on a surface of the trapping device. Each of the plurality of grooves has a shape that is obtained by replacing a bottom part of a U-groove is replaced with a V-groove.

Abstract: A method and apparatus for producing high purity distillate in evaporators is useful for evaporation of waters where volatile silica or organic compounds are encountered such as in production of hydrocarbons from geological formations. An evaporator having a contaminant reduction system is provided. The contaminant reduction system includes an upflow first mist eliminator portion to remove entrained liquid droplets and produce an intermediate purity water vapor stream. A continuous spray system provides a spray of dilute caustic solution in a selected spray configuration for mass transfer contact with the passing intermediate purity water vapor stream, to remove volatile silica compounds therefrom, and produce a partially decontaminated steam stream having mist particles therein. An upflow second mist eliminator portion is provided to remove the residual mist particles, and produce a high purity water vapor stream. The high purity water vapor stream is condensed to provide a high purity distillate stream.

Abstract: A moisture separator where a corrugated plate 43 is provided with a collecting plate 49 formed to cover a flat portion 74 and an upstream end of a slope portion disposed on a downstream side of the flat portion 74. The collecting plate 74 has an opening which opens to an upstream side in the direction of the wet steam flow S1. The collecting plate 49 is fixed to the slope portion at a base end. Between the collecting plate 49 and a body portion of the corrugated plate, a pocket section 47 and a drain duct section 48 are formed. The moisture contained in the wet steam S1 turns into droplets and enters the pocket section 47 and the drain duct section 48 from the opening of the collecting plate 49 and falls down the pocket section 47 and the drain duct section 48 respectively by gravity.

Abstract: Air filter having a preseparator with an optimized intake geometry, wherein an outflow geometry of a preseparator is matched to an intake geometry of a filter element.

Abstract: A particle separator for use in a conduit for removing solid particles from a particle-laden gas. The particle separator comprises a particle collecting chamber, an inlet port for directing the particle-laden gas into the particle collecting chamber, and an inner deflector positioned at least partially within the particle collecting chamber and downstream of the inlet port. The walls of the particle collecting chamber may include a protrusion protruding toward the inside of the particle collecting chamber cooperating with the inner deflector to recirculate the gas within the particle collecting chamber. The particle separator may also include a sump for storing solid particles that have been captured.

Abstract: An oil mist separator for separating aerosol oil from an oil-laden gas has an impactor. The impactor has a nozzle device with at least one nozzle for gas to be freed from oil, wherein the at least one nozzle has a streaming region. The impactor further has at least one deflector body having a separating region for the oil, wherein the separating region is positioned in the streaming region of the at least one nozzle. The separating region has a surface structure that is monolithically formed with the at least one deflector body. The surface structure has elevations and recesses arranged alternatingly in all directions transversely to a main streaming direction of the at least one nozzle.

Abstract: A water separator reduces a water content of an air stream, which is used in an HVAC unit for a vehicle. The water separator includes a diverter wall and an adjacent wall spaced from the diverter wall to define an air passage. The diverter wall has a terminal end extending into the air passage for changing a direction of the air stream to reduce the water content of the air stream. A filter assembly is disposed through a receiving slot in the diverter wall and is within the air passage downstream of the terminal end.

Abstract: An oil mist separator includes: a separator body having a gas flow path; a gas introduction part introducing the blow-by gas into the separator body; a gas discharge part discharging the blow-by gas from the separator body; a separation unit separating oil from the blow-by gas; dams provided on the bottom wall of the separator body downstream of the separation unit in the gas flow path and configured to block the oil separated from flowing to the downstream side; and an oil discharge part provided upstream of the dams in the gas flow path and configured to discharge the oil separated from the separator body, wherein the dams are formed along the gas flow path so as to alternately extend from the pair of side walls, and the dams extend such that tip ends of the dams are located beyond a center of the gas flow path.

Abstract: An enhanced vane bundle design that provides additional inlet chord area. An enhanced vane bundle for use in separator vessels includes top and bottom convexly-curved outlet baffles that extend horizontally from the outlet-side of the vane pack, the outlet baffles including a plurality of corresponding holes. The enhanced vane bundle further includes curved plates affixed to the convexly-curved outlet baffles, the curved plates and the convexly-curved outlet baffles define vertical pockets that extend vertically through an entirety of an outlet chord area on an outlet side of the enhanced vane bundle. The enhanced vane bundle further includes a plurality of tubes connecting the corresponding holes of the outlet baffles and extending vertically through the entirety of the outlet chord area.

Abstract: An engine crankcase breather for oil segregation, from blow-by gases, in an engine. The engine crankcase breather includes a housing with an inlet located in a downstream direction of the blow-by gases and an outlet. The breather also includes a baffle within the housing which poses a tortuous path for the blow-by gases, in order to segregate oil particles from the blow-by gases. The baffle includes a hook-shaped portion, in which the oil segregation takes place. The engine crankcase breather further includes a trough extending within the housing. The trough is aligned with the hook-shaped portion of the baffle, to collect the segregated oil from the blow-by gases.

Abstract: A wet gas separator providing superior separation of entrained droplets of liquids in a gas stream when compared with prior art wet gas separators. The wet gas separator of the present invention has a combination of: a gas inlet system with vanes that divide and direct the gas stream very evenly across the cross-sectional area of the inlet portion of the apparatus, a first stage Z-shaped de-entraining device at the upstream side of a wire mesh mist eliminator, and a gas outlet system having cyclones for removal of traces of re-entrained droplets. The apparatus of the present invention has capability of improving processing throughput by 50% when compared with prior art apparatus, with greater de-entrainment efficiency (achieving 99.7% removal of droplets larger than 10 microns in size).

Abstract: A dust collecting structure for an air-cooling electric apparatus includes a plurality of first vortex generating members which are disposed at a predetermined interval in a case and form a plurality of suction inlets; and a plurality of second vortex generating members which are disposed in an inner direction of the case and are spaced a predetermined distance apart from the suction inlets, wherein each of the first vortex generating members projects inside the case and has a shape that allows the air, which is sucked through the suction inlets by a suction fan, to generate a vortex near a rear end of the first vortex generating member, and wherein each of the second vortex generating members has a shape that divides the air into air streams and allows the air streams to generate a vortex near a rear end of the second vortex generating member.

Abstract: High molecular weight (HMW) gases are separated from an exhaust gas of a combustion source using a blower and an interior vent within the exhaust stack. The interior vent includes a vent wall having a top portion attached to the interior surface of the exhaust stack along the entire inner perimeter of the exhaust stack and a lower portion that extends downward into the exhaust stack to form an annular space or gap between the vent wall and the interior surface of the exhaust stack, and at least one opening in the interior surface of the exhaust stack between the top and bottom portions of the vent wall. The blower creates a tangential flow of the exhaust gas with sufficient centrifugal force to concentrate substantially all of the HMW gases along the inner surface of the exhaust stack. A transfer pipe removes the HMW gases from the interior vent.

Abstract: High molecular weight (HMW) gases are separated from an exhaust gas of a combustion source using a blower and an interior vent within the exhaust stack. The interior vent includes a vent wall having a top portion attached to the interior surface of the exhaust stack along the entire inner perimeter of the exhaust stack and a lower portion that extends downward into the exhaust stack to form an annular space or gap between the vent wall and the interior surface of the exhaust stack, and at least one opening in the interior surface of the exhaust stack between the top and bottom portions of the vent wall. The blower creates a tangential flow of the exhaust gas with sufficient centrifugal force to concentrate substantially all of the HMW gases along the inner surface of the exhaust stack. A transfer pipe removes the HMW gases from the interior vent.

Abstract: A gas-liquid separator comprises a housing having an inlet for receiving a gas-liquid stream and an outlet for discharging a gas stream. An impactor nozzle structure is supported by the housing and situated downstream of the inlet. The impactor nozzle structure receives the gas-liquid stream and accelerates the gas-liquid stream through an orifice that extends through the impactor nozzle structure. An impaction surface is supported by the housing and situated downstream of the orifice. The impaction surface receives the accelerated gas-liquid stream and causes separation of liquid particles from the gas-liquid stream so as to produce the gas stream, and a baffle situated downstream of the impaction surface modifies a flow of the gas stream so as to reduce carryover of liquid particles in the gas stream. A shroud for an inertial impactor gas-liquid separator is disclosed. A method for separating liquid particles from a gas-liquid stream is disclosed.

Abstract: A method and apparatus for producing high purity distillate in evaporators. is useful for evaporation of waters where volatile silica or organic compounds are encountered such as in production of hydrocarbons from geological formations. An evaporator having a contaminant reduction system is provided. The contaminant reduction system includes an upflow first mist eliminator portion to remove entrained liquid droplets and produce an intermediate purity water vapor stream. A continuous spray system provides a spray of dilute caustic solution in a selected spray configuration for mass transfer contact with the passing intermediate purity water vapor stream, to remove volatile silica compounds therefrom, and produce a partially decontaminated steam stream having mist particles therein. An upflow second mist eliminator portion is provided to remove the residual mist particles, and produce a high purity water vapor stream. The high purity water vapor stream is condensed to provide a high purity distillate stream.

Abstract: A conduit carrying gaseous matter has a device inside it forming a low-lying sump for separating and collecting non-gaseous matter. The device fits within a flexible section of the conduit and includes a barrier plate oriented generally horizontally to longitudinally divide a length of the conduit into a gas-carrying passageway (above the barrier plate and a sump (below the barrier plate, a spacer extending from a lower surface of the barrier plate, and first and second frame members extending from an upper surface of the barrier plate at spaced-apart locations. The spacer and the frame member contact inner surfaces of the conduit to positively position the barrier plate within the conduit, and the frame members are oriented obliquely to one another to urge the flexible section of the conduit into a bent shape having a lowest portion defining the sump.

Abstract: [Problem to be Solved] To enhance the performance for separation of oil mist from blow-by gas. [Solution] A filter element 13 which is to be attached to an oil separator unit 3 includes a core 31. This core is a double tube having an internal cylindrical member 34 and an external cylindrical member 35, and a space between the internal cylindrical member and the external cylindrical member is used as a separation chamber 36. An injection hole 39 for injecting blow-by gas while increasing its flow velocity is provided in the internal cylindrical member. A surface which is an inner wall surface of the external cylindrical member and which faces the injection hole is a spraying surface onto which the blow-by gas injected from the injection hole is sprayed. Moreover, an opening for oil discharge from which oil OL condensed on the spraying surface is discharged, and an opening for discharge from which the blow-by gas from which oil mist has been separated is discharged are provided in the core.

Abstract: An enhanced vane bundle design that provides additional inlet chord area. An enhanced vane bundle for use in separator vessels includes top and bottom convexly-curved outlet baffles that extend horizontally from the outlet-side of the vane pack, the outlet baffles including a plurality of corresponding holes. The enhanced vane bundle further includes curved plates affixed to the convexly-curved outlet baffles, the curved plates and the convexly-curved outlet baffles define vertical pockets that extend vertically through an entirety of an outlet chord area on an outlet side of the enhanced vane bundle. The enhanced vane bundle further includes a plurality of tubes connecting the corresponding holes of the outlet baffles and extending vertically through the entirety of the outlet chord area.

Abstract: An extension piece portion is provided at a lower end portion of a screen plate so as to extend from the lower end portion, beyond a gas-passing through hole, to an oil pocket portion. An oil guide portion is provided at respective gas-hitting-side face portions of the screen plate and the extension piece portion so as to guide oil trapped at the above-described face portions into the oil pocket portion. Accordingly, it can be prevented that part of the oil in the middle of dropping down into the oil pocket portion from the screen plate is carried away by the gas flow passing through the gas-passing through hole, so that the efficiency of oil trap can be improved.

Abstract: A vane-type separator with pockets for removing solid and liquid particles entrained in a gaseous stream. Vanes are fabricated from a plurality of modular components which may be assembled to form vanes of varying lengths. The vanes include pockets with rounded leading edges to encourage particulate to impinge on the vane and move into the pockets by surface tension and aerodynamic forces. The vane-type separator allows for a higher gas stream velocity before particulate is found downstream of the vane-type separator.

Abstract: A device for removal of fine-grained or dust-like solids from a container that is to be pressurized or is pressurized, whereby the container is equipped with a double-walled discharge cone or funnel, avoids the use of porous materials, such as sintered metals or the like, while making available good conveyance properties in the transfer funnel, without restricting the grain sizes of the material, in each instance, whereby even particle-charged gas can be used for conveyance. The gas exit openings are larger than the largest particles of the solid to be removed, and the gas exit openings are provided with a pipe connector or gas feed channel that projects into the interior of the ring chamber and has at least one angle with an imaginary horizontal plane, and the gas feed channel is part of a retention device for preventing solid from trickling into the ring chamber.

Abstract: A vent head for a steam system is provided. In one embodiment, the vent head may comprise a body defining a vent head chamber and having a vent head outlet. The vent head comprises a steam inlet conduit having a steam outlet that opens into the vent head chamber and a baffle disposed within the vent head chamber and above the steam outlet. The baffle may have an impingement region and a convex portion which is disposed between the impingement region and the edge of the baffle. In use, the steam outlet discharges steam into the vent head chamber which impinges on the impingement region of the baffle, thereby separating entrained liquid water from the steam.

Abstract: A conduit piece for the absorption of foreign bodies in an air distribution conduit of an air-conditioning installation, with a bent portion, the inner wall (I) of which has a large bend radius (Rg) and a small bend radius (Rk). To avoid flow noises according to the invention, an interception device (1, 10, 11, 13, 14) be provided in the region of the large bend radius (Rg) for the purpose of intercepting foreign bodies carried through the conduit piece together with the air.

Abstract: A separator comprises a plurality of vanes which protrude upwardly from a lower surface of an air intake duct to separate a flow of water from air. The separator also includes a hydro-cyclone that increases the separation of the water and air using a vortex effect.

Abstract: A separator is provided. The separator in which the flow is conducted using separation elements from an inflow to an outflow in such a manner that at reversal points media separators deposit a separation medium. Depending on the flow through them and the orientation with respect to the acceleration due to gravity, individually shaped separating elements are arranged in such a manner that at least two different paths of the flow along the separating elements in the separator form.

Abstract: A hydrocarbon adsorption filter device comprising: a filter housing; at least one filter element with activated carbon arranged in the filter housing; an intake canal, connecting the filter housing with an environment, wherein fresh air is taken in during a flushing operation; and an intake canal housing cover, wherein the intake canal housing cover includes a labyrinthine canal structure having a first end and an opposing second end, wherein the first end is in communication with the intake canal while the second end is in communication with a floor-side opening of the housing.

Abstract: A pressure cyclone is disclosed having a concave top head, wherein the concave top head has a substantially flat roof disposed in the interior of the cyclone vessel. An inlet is tangentially-coupled to the vessel and has an inlet nozzle disposed therein and configured to smoothly transition into the cyclone vessel to create a vortex that separates solid particulates from an incoming particulate-fluid suspension. In particular, the one surface of the inlet nozzle is tangent to the inner surface of cyclone vessel and another surface of the inlet nozzle is parallel and continuous with the substantially flat roof. An inlet casing is disposed around a length of the inlet nozzle and configured to transition from a circular casing to an elliptical casing along the length of the inlet nozzle, and couple to the vessel with the elliptical casing.

Abstract: A separator is provided for separating liquids from a gas stream and has a plurality of separating profiles juxtaposed parallel to one another, each profile forming two curved deflection surfaces which lie opposite one another with the concave side laterally offset, wherein the deflection surfaces between them include a swirl chamber having an inlet gap and an outlet gap and terminate at their longitudinal edges in a projection that projects from the deflection surfaces and extends along the longitudinal edges. At least one of the projections has a first, substantially planar outer surface emanating from the deflection surface substantially transversely thereof and a second, substantially planar outer surface adjoining the first outer surface at an acute angle, so that the at least one projection forms a sharp edge that projects into the gas stream flowing along the deflection surfaces.

Abstract: The disclosure relates to a modular waste liquid separator and collector device, comprising component modules. A first module comprises a support structure, a second module comprises a droplet separator connectable to said support structure, and a third module comprises a waste liquid collector. The component modules are individually portable, and are assembled at the point of use.

Abstract: A system for capturing and separating solids, liquids, and gases, such as during air drilling of a well, can include a cylindrical vessel with an inlet for receiving an input. A target plate can impact the input, remove solid and liquid therefrom, and direct flow from the inlet, forming a vortex. A first chevron baffle, a second chevron baffle, and a demister baffle can further remove solid and liquid from the input, forming a cleaned gas. The cleaned gas can be burned, the solid can be dried, and the liquid can be recycled for reuse in drilling operations.

Abstract: A mist eliminator including a substrate and a plurality of frusto-conical shaped protrusions disposed on the substrate is provided. The plurality of frusto-conical shaped protrusions have a geometry and are positioned at intervals that provide coalescence and retention of water particles from moisture containing air contacting the substrate and frusto-conical shaped protrusions. A moisture removal system and a method for removing water particles from inlet air with the mist eliminator are also disclosed.

Abstract: In one embodiment, an aerosol particle collector includes a duct defining a flow path configured to remove larger particles from aerosol flowing through the duct and to store the removed particles in the duct while maintaining a uniform rate of aerosol flow throughout a predetermined useful life of the duct even as stored aerosol particles accumulate in the duct. In another embodiment, an aerosol particle collector includes a duct and a plurality of baffles in the duct. The duct has an elongated inlet extending along a length of the duct and an outlet located at one end of the length of the duct. A first one of the baffles extends along a first side of the duct for deflecting incoming aerosol toward a second side of the duct opposite the first side. A second one of the baffles is for deflecting aerosol toward the outlet.

Abstract: A separator for liquids, in particular condensate, from liquid-loaded compressed gases-generally serves, by coarse separation of condensate from the compressed gases, to protect downstream prefilters of cold dryers or adsorption dryers against overload due to condensate. In the separator of the invention, in a pot-shaped housing, a separator element in the form of a hollow cylinder is arranged, which consists of a multiplicity of flow chicanes formed from guiding bodies and impact bodies. The moisture-loaded gases are passed from the interior of the hollow cylinder to the exterior via these flow chicanes, condensate separating off on the chicanes and collecting in the collecting space.

Abstract: The gas-liquid separator separates a variable multi-phase flow of gas and liquid in a gas dominated flow and a liquid dominated flow. The separator includes a housing which encloses a separation chamber, an inlet port for feeding the multi-phase flow into the separation chamber, a liquid outlet port for discharging the liquid dominated flow from the separation chamber and a gas outlet port provided at a position above both the inlet port and the liquid outlet port for discharging the gas dominated flow from the separation chamber. Both the inlet port and the liquid outlet port are positioned adjacent to an elongated lower bottom wall of the housing and define a flow direction into the and out of the separation chamber approximately aligned along the bottom wall, wherein the separation chamber extends above the bottom wall in between the inlet port and the liquid outlet port.

Abstract: An extension piece portion is provided at a lower end portion of a screen plate so as to extend from the lower end portion, beyond a gas-passing through hole, to an oil pocket portion. An oil guide portion is provided at respective gas-hitting-side face portions of the screen plate and the extension piece portion so as to guide oil trapped at the above-described face portions into the oil pocket portion. Accordingly, it can be prevented that part of the oil in the middle of dropping down into the oil pocket portion from the screen plate is carried away by the gas flow passing through the gas-passing through hole, so that the efficiency of oil trap can be improved.

Abstract: A particle separator for an air inlet unit, comprising at least one inlet channel, for a fluid flow contaminated with particles, defined between two opposing fluid guide surfaces, narrowing in the fluid flow direction and opening in an outlet channel for particles, connected to at least one fluid channel for the purified fluid which leads away from the inlet channel in a region outside the inlet channel. A method for the purification of the fluid flow contaminated with particles whereby the above is led along one of the fluid guide surfaces, which is curved, at least in a part before the outlet channel, towards the interior of the inlet channel.

Abstract: A separator assembly for removing material that is entrained in a gas stream. The separator assembly comprises a housing having a head part which provides the upper end of the housing and a body part which provides the lower end of the housing. The separator assembly also comprises a shield which extends across the housing towards the lower end thereof so as to leave a collection space between it and the lower end in which material that is separated from the gas stream can collect. There is at least one opening in or around the shield through which the material can flow past the shield into the collection space. The separator assembly further comprises a liner sleeve which covers at least a part of the inside wall of the body part between the shield and the upper end of the body part.

Abstract: A trapping device that traps a particle in a vacuum atmosphere includes a plurality of grooves arrayed on a surface of the trapping device. Each of the plurality of grooves has a shape that is obtained by replacing a bottom part of a U-groove is replaced with a V-groove.

Abstract: A two-stage blade-type mist eliminator is provided. In general, both stages include a plurality of impingement blades arranged to form a vaulted or inverted V-shaped profile. The first stage defines a larger included angle than the second stage. Advantageously, the corresponding terminal ends of each stage can be supported by a common support member.

Abstract: One exemplary embodiment can be a vessel for receiving a fluid. The vessel may include a shell and a demister including at least one section positioned proximate to the shell. Each section can have a first surface for primarily receiving the fluid and orientated, independently, about 5—about 85° with respect to horizontal.

Abstract: A dust collecting mechanism for an air pump, in particular, an electromagnetic vibrational pump having a compact structure, capable of realizing the efficiency of dust collecting ability is disclosed. The mechanism is simple in assembly work. An inlet and an outlet for fluid are provided in the mechanism at a barrier chamber of the mechanism provided in at least one portion of a housing. A plurality of cross walls at which 1 or 2 or more of vent holes are provided are arranged in the mechanism. At least the position of the vent hole of the adjacent cross wall is different among a plurality of the cross walls.

Abstract: A gas/oil separator is provided, wherein a pre-separator tube has an upper solid portion, and a lower perforated portion. Holes in the lower perforated portion allow a gas stream to move radially inwardly, and to a downstream filter pack. The holes have a raised portion extending radially outwardly, and prevent previously separated oil from being reintroduced into the gas stream.

Abstract: An air filter unit (1) for a carburetor (2) of a portable handheld work apparatus includes a filter element (3) and at least one clean air channel (10, 11) arranged between the filter element (3) and the carburetor (2). At least one condensation rib (29, 30, 31, 32) is arranged in the clean air channel (10, 11) running in flow direction.