Filtration systems having a tangential air cleaner having a coiled media filter element and a cyclonic pre-cleaner are described. An outer wall of the filter element acts as a pre-cleaner sleeve of the housing to generate a cyclonic flow of the intake air prior to the intake air being filtered by the filter element. The housing cover includes geometry that redirects the cyclonic low from a tangential path to an axial, straight-through flow directed through an inlet flow face of the filter element. Various embodiments of such filtration systems offer increased filter performance and capacity compared to similarly sized cylindrical pleated filter elements having a radial flow filtering path.

A cleaner includes: a main body that receives a suction motor; and a filter unit that is detachably coupled to the main body to filter air discharged from the suction motor and includes a ring-shaped filter and a filter frame that receives the ring-shaped filter, wherein the filter frame includes: an inner frame; an outer frame that defines a filter space for receiving the filter in cooperation with the inner frame; and a ring-shaped filter cover that connects the outer frame and the inner frame to each other and has one or more air openings.

An axial flow air filter system is described. The system includes an axial flow filter element having a filter media. The filter media includes an inlet face and an outlet face, the inlet face spaced apart from the outlet face. The axial flow filter element includes an upper support ring adjacent to the inlet face of the filter media. The upper support ring circumscribes the filter media and supports an upper seal. The upper seal forms a seal with a housing when the filter element is received in the housing. The axial flow filter element further includes a lower support ring adjacent to the outlet face of the filter media. The lower support ring circumscribes the filter media. In some arrangements, the lower support ring does not include a seal.

A filter device is disclosed having a round filter element having a filter medium body with an open interior. The filter element is installable into a filter housing having a base filter housing and a housing cover, in which an inflow opening of the cover overlaps against and aligns with an inflow opening of a base housing part such they form a continuous inflow opening. A support mesh cage arranged on the radially outer wall of the annular filter medium body. The filter housing has a longitudinally extended cross-sectional shape in which the inflow opening and an outlet opening are both arranged on the base housing part at opposing sides of the base housing part.

A manufacturing method enabling the obtainment of a functional part essentially formed in a metallic material, all or part of the functional part delimiting a filtering medium permeable to a fluid and delimiting first and second main faces for a preferred circulation of the gas through the filtering medium. The method includes a main phase consisting of an additive manufacturing method in successive passes from a support tray. Each pass includes the deposition of at least one layer of the metallic material, the deposited material adhering to the metallic material deposited before. The deposition is controlled at each pass so the stack of metallic material constitutes the functional part. The filtering medium includes a coalescent network of connecting strands interconnected according to a three-dimensional spatial distribution between the faces, the connecting strands of the network delimiting therebetween pores spatially distributed within the filtering medium in three dimensions between the faces.

In a combustion engine, an exit stream of blow-by gases follows a fluid pathway through an oil and air separator and a breather filter, the oil and air separator including a first housing including a central chamber therein, the central chamber divided into a first outer portion and a second inner portion by a barrier; a filter material disposed between the first outer portion and the second inner portion; a cap directly coupled to the first housing, the cap including a first lumen therethrough, the first lumen including a first end disposed at the second inner portion; and a coupler removably coupling the cap and an extension portion including a second lumen therethrough.

A filter element for filtering a fluid passing through the filter element, the filter element having a fluid entry face and a fluid exit face and is provided with a group of first channels and a group of second channels, through which the fluid to be filtered can flow from the respective first channel into the second channel, that is arranged next to it, wherein a through-channel leads through a filter pack from the fluid entry face to the fluid exit face, which through-channel has an opening at the fluid entry face and/or has an opening at the fluid exit face, wherein an element closes the flow of fluid through through-channel, while leaving a volume open inside the through-channel that is at least 10% of the volume that the through-channel would have without the element, or the element allows the flow of fluid through the through-channel and interacts with the flow of fluid through the through-channel and/or the sidewalls of the through-channel deviate at least in some areas from a cylindrical wall in order to thereby create an element that interacts with a flow of fluid through the through-channel.

Provided is an inexpensive mesh filter with high productivity. This mesh filter, which is an integrally molded product of resin, includes: a mesh part in which a plurality of ribs are disposed in a lattice shape; a rim part which is formed in an annular shape so as to surround the mesh part, and to which the plurality of ribs are connected; and a final filling part which is disposed on the inner side of the rim part, and to which some of the plurality of ribs are connected. The cross-sectional area of at least one rib among the ribs connected to the final filling part is smaller than the cross-sectional area of at least one rib among the ribs not connected to the final filling part.

There is provided a head wearable air purifier comprising a first speaker assembly and a second speaker assembly, wherein the first speaker assembly comprises a filter assembly, an impeller for creating an airflow through the filter assembly, a motor arranged to drive the impeller, and an air outlet downstream from the filter assembly for emitting the filtered airflow from the speaker assembly. The head wearable air purifier further comprise a nozzle arranged to receive the filtered airflow from the first speaker assembly, the nozzle comprising an air outlet arranged to emit the received filtered airflow from the head wearable air purifier. The filter assembly is provided upstream of the impeller and comprises one or more generally frusto-conical filter elements.

The flow path switching type collecting apparatus of by-products for a semiconductor manufacturing process of the present disclosure includes: a cylindrical housing that has a top plate having a gas inlet and a bottom plate having a gas outlet and fastening portions extending and protruding inside the housing, and receives and then discharges an exhaust gas flowing inside; and a flow path switching type disc collection tower that is installed vertically in the housing and includes an open edge-mesh center type collection disc, a mesh edge-open center type collection disc, a solid edge-open center type collection disc, and an open edge-solid center type collection disc that have different external shape to collect by-products of an exhaust gas flowing insides.