Filter media for a drum filter that includes a plurality of annular frame members, each annular frame member having a circumference is disclosed. The filter media includes a filter sheet with first and second engagement strips having a cord portion and an attachment tab portion connected to the filter sheet. The first and second engagement strips engage with first and second connecting strips located on the annular frame members. Each connecting strip has a receiving portion that receives the cord portion of the associated engagement strip. Each connecting strip also has a body portion configured to engage a drum filter frame. An engagement mechanism configured to attach a filter sheet to a drum filter frame is also disclosed. A system for attaching a filter media to a cylindrical drum filter is also disclosed. When the first and second engagement strips are fully received in the first and second connecting strips, the filter media extends between the first annular frame member and second annular frame member and along the first and second circumferential edges to enclose a first cylindrical filter space.

Air cleaner and preferred components for an air cleaner are provided. In certain arrangements, a band is mounted to the media pack, surrounding the media. Also, the cartridge is non-circular and includes a seal thereon.

Air cleaner assemblies, components, and features are described. The features can be used to provide that the air cleaner assembly includes a housing and cover within which primary and secondary filter cartridges, having a media pack and a seal arrangement surrounding the media pack, can be installed. The filter cartridges can include an open end cap with an axially deviating seal arrangement and a plurality of axially extending channels for engaging with ribs on the housing. The filter cartridges can also include extension members extending from the open end cap that include the axially extending channels, entirely or partially. The filter cartridges can also include a guide member extending from the extension members for providing a low friction surface against the housing during installation that allows axial force exerted by the installer to be translated into a rotational force that rotates the filter cartridge during installation.

An air filter, an air filter assembly, and method of installing the air filter into a housing of the air filter assembly are provided. The air filter includes an attachment portion and a lock tab. The lock tab is carried by and resiliently moveable relative to the attachment portion. The lock tab is located radially outward from the attachment portion and movable circumferentially about a central axis of the air filter. Another feature relates to using an end stop in a housing as a catch. Yet another feature relates to using a perforated end cap and capping such perforations with a housing seal.

A dust collector includes an enclosure and a tube sheet separating filter and clean air compartments. The tube sheet forms a filter opening and a filter is located within the filter compartment and includes a filter flange having an air outlet aligned with said filter opening. The flange includes first and second alignment structures located on a first lateral side of the flange. A clamping assembly includes first and second filter clamps that are movable between a sealing position for sealing the filter flange against the tube sheet, and a release position. The first filter clamp engages the first alignment structure when in the sealing position. The second filter clamp engages the second alignment structure when in the sealing position. The dust collector includes means for moving the filter clamps between the sealing position and the release position.

A side-covered axial flow filter has a housing, a filter core, a filter frame, and a side cover. When assembling, the filter frame and the filter core are both obliquely installed into the housing. Limiting ribs of the filter frame are obliquely mounted between first pushing panels and a clamping surface of the housing, and inner pushing parts of the limiting ribs abut the first pushing panels. The portions where the inner pushing parts abut the first pushing panels serve as fulcrums to straighten the filter core and the filter frame, so outer pushing parts of the limiting ribs may abut the clamping surfaces of the housing and generate a strong torque and a tightly sealing effect without much effort. The side cover also abuts the filter frame when assembled on the housing, so the filter frame is under balanced pressure to avoid leak.

An air freshener is disclosed. The air freshener includes a body case defining the air freshener, the body case having a filter installation opening formed in one side thereof, a filter housing disposed in the body case, the filter housing having a power terminal disposed therein, a drawer configured to be withdrawn from the inner space of the filter housing through the filter installation opening, and an electric dust collector separably located in the drawer, the electric dust collector having a power-receiving terminal disposed therein, wherein the power terminal contacts the power-receiving terminal in the state in which the drawer is settled in the inner space of the filter housing.

Implementations disclosed herein provide a compact downdraft table including a spark arrestor oriented below a work surface, a vertically oriented cylindrical filter cartridge located below the work surface, a fan assembly that draws air through the work surface, the spark arrestor, and the filter cartridge and exhausts filtered air out of the downdraft table, a purge assembly that discharges purged air to an interior of the filter cartridge to purge particulates collected on an exterior of the filter cartridge, wherein the spark arrestor, filter cartridge, fan assembly, and purge assembly are all contained within a main housing for the downdraft table.

Implementations disclosed herein provide a compact downdraft table system including a vertically oriented cylindrical filter cartridge located below a work surface in a main housing of the downdraft table, a purge assembly in the main housing vertically aligned with the filter cartridge that discharges purged air to an interior of the filter cartridge to purge particulates collected on an exterior of the filter cartridge, and a self-closing louvre in the main housing that permits air flow from the work surface, through the louvre, and through the filter assembly in a first direction, and prevents purged air flow from flowing through the louvre to the work surface in a second direction opposite the first direction.

A filter element has, on a filter element housing, a first and a second filter medium body, which are arranged at an angle to each other.