A Twist-interlocking Engine Housing and Air Filter System and Method is disclosed. The filter assembly provides unequaled ease of installation and removal, as well as superior sealing between the housing and the filter assembly. For installation, the user needs only to insert the filter into the housing and then give the filter assembly a one-quarter turn or less to lock the filter assembly into the housing. There are features within the filter base that snap-locks the filter in place to resist inadvertent loosening. Finally, the housing and filter are designed so that the outer flange of the filter base is recessed into the side of the housing in order to prevent the intrusion of unwanted grime and/or fluids.

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 is disclosed, along with related methods. In one aspect, the air cleaner assembly has a housing including a housing body and a removable cover that together define an interior volume for holding a filter cartridge. The housing body can include a first plurality of lugs, wherein each of the first plurality of lugs has a first engagement surface disposed at a first angle that is oblique to a rotational plane of the cover. A second plurality of lugs can be provided on the cover, wherein each of the second plurality of lugs has a second engagement surface disposed at the first angle. A lock mechanism can also be provided that is disposed on the cover, wherein the lock mechanism includes a lock member axially movable between a locked position and an unlocked position to selectively secure the cover to the housing body.

A fluid filter for a motor vehicle includes a filter housing and a filter cartridge which is disposable in the filter housing. The filter housing has a housing pot and a covering element where the filter cartridge is connectable to the housing pot by rotating around a longitudinal axis of the filter cartridge. A holding element having a web is disposed on an end plate of the filter cartridge where the web protrudes from a wall of the holding element and where the wall is formed to be spiral shaped radially to the longitudinal axis. The web of the holding element is engageable behind a holding web in a mounting position of the filter cartridge where the holding web projects at a constant distance from a wall, formed to be spiral shaped radially to the longitudinal axis, of a counter bearing disposed on the housing pot.

An air purifier housing comprises an outer cover and a bottom bracket with a center cavity which is open downwards and insertion grooves, recessing openings stretching into the center cavity are formed in side walls of the insertion grooves, insertion rods are fixed on the outer cover, which is inserted into the insertion grooves through the insertion rods; installation grooves corresponding to the recessing openings are in the insertion rods; and a limiting structure is in the center cavity and comprises a driving part and inner container protrusions which correspond to the recessing openings, and the driving part connects with the inner container protrusions and drives them to reach a first position where the inner container protrusions stretch out of the insertion grooves to be inserted into the installation grooves of the insertion rods or to reach a second position where the inner container protrusions retreat into the center cavity.

An airborne pathogen extraction system that provides for continuous airborne pathogen particle extraction from a specifically targeted area in a room or a specifically targeted area proximate to a user. The pathogenic particles are filtered and/or disinfected before the air is returned proximate to the originating location, or are directed an area away from the user(s). The airborne pathogen extraction systems and methods lower the chances of contagion or infection from airborne pathogens, such as viruses.

A secondary element with a first open end and a second end positioned opposite the first end has a filter medium arranged about a longitudinal axis of the secondary element and extending from the first open end to the second end. A closed end disc is disposed at the second end and seal-tightly closes off the second end. The closed end disc has a first connecting element that, for an intended installation of the secondary element in a filter system, is configured to interact with a second connecting element of a support tube of the filter system to secure the secondary element on the support tube. A filter system with such a secondary element has a support tube provided with a complementary second connecting element, wherein the secondary element is secured on the support tube by the first and second connecting elements engaging each other.

Various embodiments provide for a filter assembly. The filter assembly includes a filter housing, a filter element, and a cover. The cover includes a first cover end and a second cover end disposed axially away from the first cover end. A second coupling member is adjacent to the second cover end. The second coupling member is configured to engage a first coupling member to couple the cover and the filter housing. A biasing member is coupled to the first cover end. An interface plate is configured to press against a first endplate of the filter element to secure the engagement of a first engagement portion of a filter seal member of the filter element and a second engagement portion of a housing seal member of the filter housing.

A filter seal member mold includes a first mold end and a second mold end disposed axially away from the first mold end. A first mold surface is disposed between the first mold end and the second mold end and includes at least one lobe mold and at least one guide channel mold. The at least one lobe mold is configured to form at least one lobe on an end of a filter element. The at least one guide channel mold is configured to form at least one guide channel on the end of the filter element. A second mold surface is disposed between the first and second mold end and disposed radially away from the first mold surface. A mold channel is formed between a first mold surface and a second mold surface. The mold channel includes a closed portion and an open portion adjacent the second mold end.

An air cleaner assembly is disclosed, along with related methods. In one aspect, the air cleaner assembly has a housing including a housing body and a removable cover that together define an interior volume for holding a filter cartridge. The housing body can include a first plurality of lugs, wherein each of the first plurality of lugs has a first engagement surface disposed at a first angle that is oblique to a rotational plane of the cover. A second plurality of lugs can be provided on the cover, wherein each of the second plurality of lugs has a second engagement surface disposed at the first angle. A lock mechanism can also be provided that is disposed on the cover, wherein the lock mechanism includes a lock member axially movable between a locked position and an unlocked position to selectively secure the cover to the housing body.