An air purifier having a side-access or horizontally-removable air filter assembly may include a housing, a base plate, a filter plate, a filter, and an air blowing unit. In some configurations the air purifier also includes a UV-light source and a removable covering or panel. Once the removable cover is separated from the housing, the filter plate with the filter assembly may be slid horizontally into and out of the housing. Once the filter plate, filter, and UV-light source are removed from the housing, the filter may be replaced, cleaned, and/or inspected.

A respirator mask for long-term use is disclosed. In an example, a respirator mask includes a transparent lens integrated with a frame. The respirator mask also includes a first inhalation filter assembly connected to a left external side of the frame, a second inhalation filter assembly connected to an right external side of the frame, and an exhalation filter assembly connected to a bottom external side of the frame. Each of the filter assemblies have the same dimensions and include filter media, a base section configured o receive the filter media, a filter cap removably connected to the base section to retain the filter media against the base section, and a check valve located between the filter media and the base section or integrated with the base section. The disclosed respirator mask is configured to improve airflow and comfort for a wearer while minimizing postential causes of contamination.

An air cleaner assembly with a restriction indicator (14) includes a housing (12) having an exterior surface around an interior volume. The housing includes a bore (42) extending through a portion of the exterior surface of the housing surrounded by a bore wall (38) protruding from the portion of the exterior surface. A receptacle wall of the housing is disposed around the bore wall and is radially spaced from the bore wall to form a channel (44) between the bore wall and the receptacle wall. A restriction indicator (14) measures a restriction in the interior volume and displays an indication of the restriction. The restriction indicator includes a stem (46) that is at least partially insertable into the bore that engages an inner surface of the bore wall. One or more tabs (52) of the restriction indicator are at least partially insertable in the channel and removably couple to the receptacle wall.

An air purifier includes a first case and a second case that are insertably coupled such that the second case slides up and down with respect to the first case. The first case may suction air through a suction space provided at a bottom and a plurality of holes formed in a side wall. The second case may include a discharge grill provided at a top end through which air is discharged and a plurality of holes formed in a side wall through which air is suctioned when the second case is moved down to a first position and through which air is discharged when the second case is moved up to a second position. The top discharge grill may be opened and closed. The second case may also include a side discharge portion formed in the side wall above the plurality of holes. The side discharge portion may be opened and closed.

A filter for compressed air systems is provided. The filter includes a filter housing with a filter therein between an air inlet and an air outlet. Compressed air flowing between the air inlet and the air outlet passes through the filter housing and the filter element. A base is removably fastened to the filter housing which may be separated from the filter housing to allow the filter element to be removed and replaced.

An improved device for collecting particulate matter suspended in the ambient air is disclosed comprising a container extending between an open first end and a closed second end defining a container interior. A container output communicates with a container interior located proximate the closed second end of the container. A filter cassette comprising a collection filter is permanently affixed to a filter holder. A retainer having a retainer input retains the filter cassette between the retainer input and the container output. An output connector connects the container output to a low pressure source for drawing ambient air into the retainer input for enabling the collection filter to collect particulate matter suspended in the ambient air entering the retainer input. Preferably, the filter holder and the filter are disposable.

Provided is a cartridge assembly having first and second cartridges sealed by an interface member having a first sealing member along a radially outer surface thereof having a non-planar geometry around the outer surface and a second sealing member along the radially outer surface having a non-planar geometry around the outer surface. The sealing members may each have a repeating, undulating, non-planar geometry around the outer surface. The cartridges have ends with matching geometries to allow the cartridges to engage in surface-to-surface relation around their entire extents to create with the interface member an air tight seal.

The present disclosure is directed to a new quick-connect, bayonet-type coupling arrangement for use with connecting a filter cartridge or element to a fluid-consuming machine. Advantageously, the features of the coupling arrangement can be provided while simultaneously maintaining backward compatibility with screw-thread based systems by modifying the screw thread on the end cap so as to include judicially arranged non-interfering segments. Accordingly, the disclosed fluid filter elements can not only be installed on systems according to the present disclosure but also on prior-art systems presenting a thread-based connector.

An air cleaner assembly comprises a housing and a filter element. The housing comprises a first housing end and a second housing end. The second housing end of the housing defines an opening of the housing for fluid flow. The filter element is configured to be received through the first housing end of the housing. The filter element comprises a filter media and a closed endplate. The filter media comprises a first media end and a second media end. The second media end of the filter media defines an opening of the filter element for fluid flow. The closed endplate is positioned along the first media end of the filter media and comprises a wall with an axially inner surface and an axially outer surface. The axially outer surface is exposed to an area outside of the housing and closes off the first housing end of the housing when the filter element is positioned within the housing.

An air purifier including a body including a suction port and a discharge port disposed on opposing surfaces thereof, and having an inner space through which air flows from the suction port to the discharge port, a fan disposed in the inner space and having a side surface separated from an inner wall of the body, at least one light source module disposed in the inner space to emit UV light, a power controller mounted on the inner wall and connected to a power source to supply electric power to the light source module, a cover mounted on the inner wall to cover the power controller, and at least one filter disposed in the inner space of the body, in which the cover includes a tilted air flow guide facet to guide tilted to allow air suctioned through the suction port toward the filter.