A dust reduction device for a vehicle includes an inlet aperture for receiving airflow created as a result of forward movement of the vehicle. The dust reduction device provides a primary airflow path leading from the inlet aperture to a vehicle opening, and a secondary airflow path leading from the inlet aperture to a ventilation exit. During forward movement of the vehicle, the primary airflow path is substantially blocked by airflow from the secondary airflow path such that airflow from the primary airflow path is provided to the vehicle opening and into the vehicle thereby minimising dust ingress in the vehicle.

A filter element, in particular a replaceable filter element, more particularly for separating particles and/or gases and/or liquids, in particular a filter cartridge for use in a filter, more particularly a compressed air filter, in particular as a component of a filter comprising multiple filtration stages, includes a substantially tubular body with an annular end face that faces a filter head, an underside, and a circumferential surface. Multiple, preferably four, retaining arms, running radially in relation to the central axis, are provided in the region of the end face and a toroidal filter-element sealing surface is provided on the end face, and the retaining arms protrude in relation to the filter-element sealing surface. The filter element is usable in a filter.

The invention is based on an air filter with a filter element (28), a substantially cylindrical filter housing (12) with an unfiltered air inlet (18) and a filtered air outlet (20) arranged substantially concentrically on a first end face of the filter housing (12), wherein an extension tube (22) projects into the interior of the filter housing (12) at the filtered air outlet (20) and the filter element (28) comprises a first end plate (24) which can be plugged onto the extension tube (22).

It is proposed that the first end plate (24) is formed of plastic and comprises a sealing lip (30) formed thereon and projecting radially inwardly, which sealing lip (30) rests against the extension tube (22) in the plugged-on state.

An air-conditioning system is provided that may include a first air-processing apparatus, which includes a first outlet formed to be open toward a floor and a first inlet formed to be open in a direction inclined relative to a direction in which the first outlet is open and is configured to deliver heat-exchanged air to the first outlet, and a second air-processing apparatus, which includes a second outlet formed to be open in a direction parallel to the first outlet and a second inlet formed to be open in a direction parallel to the first inlet and is configured to deliver purified air to the second outlet. The first outlet and the second outlet extend in a lateral direction, and the first air-processing apparatus and the second air-processing apparatus are arranged in the lateral direction.

A vacuum cleaner includes an air inlet, a filter, a fan, and a main air outlet. The filter has a clean side and an unclean side. An unclean air chamber is formed between the air inlet and the unclean side of the filter. A first air chamber is formed between the clean side of the filter and the fan. An air outlet chamber is formed between the fan and the main air outlet. The upstream end of the air outlet chamber is connected to the first air chamber. An airflow may enter the vacuum cleaner from an external environment via the air inlet under the action of the fan, and sequentially passes through the unclean air chamber, the filter, the first air chamber and the air outlet chamber the main air outlet. The vacuum cleaner may include a self-cleaning air passage and an air supply air passage.

A filter element may include first and second pairs of opposing walls extending along a longitudinal axis of the filter element. The first and second pairs of opposing walls may create a flow passage between an inlet end and an outlet end of the filter element. The filter element may further include filter media configured to separate particulates from air flowing through the flow passage, and a wedge element associated with an exterior surface of at least one of the first pair of opposing walls. The wedge element may be configured to cooperate with an interior surface of a filter housing configured to receive the filter element. Outlet edges of the opposing walls of the first pair of opposing walls may extend at a first oblique angle with respect to the longitudinal axis, and the wedge element may extend at a second oblique angle with respect to the longitudinal axis.

A filter apparatus for filtering a stream of gas. The cartridge has an upper part and a lower part. The upper part is joined to the lower part by a connection. The filter cartridge supports a filter element. The filter cartridge has a resilient connection arrangement for connecting the filter cartridge to a bowl of a filter apparatus. The filter apparatus has a head, a bowl connectable to and sealable relative to said head, and the filter cartridge.

An adapter (1) for use in a dedicated coupling system (2) for releasably coupling an air filter cartridge (20) and a housing (36) of a dedicated air filter assembly (34), the adapter (1) comprising: a first surface area (4) being rotatably coupleable with a housing-side coupling element (6) of the coupling system (2), and a second surface area (8) preferably being non-rotatably coupleable. Cartridges, components, features and methods are described.

Various example embodiments relate to a filtration system. The filtration system comprises a housing having a first housing end and a second housing end. The housing defines a central compartment therein. The housing comprises a key slot disposed on the first housing end and a housing key element protruding from the first housing end toward the second housing end. The filtration system further comprises a filter element positioned within the central compartment of the housing. The filter element has a first filter end and a second filter end. The filter element includes filter media and an endplate disposed on the first filter end. The endplate includes a central endplate opening, a key element configured for engagement with the key slot, and an installation guidance element formed along the central endplate opening. The installation guidance element is configured for engagement with the housing key element.

A compressor system includes a compression module having an inlet for receiving air; and a filter housing in fluid communication with the compression module. The filter housing is constructed to house a filter, the filter having a sealing feature disposed at a first end of the filter and having an engagement feature disposed at a second end of the filter opposite the first end. The filter housing includes a trap door constructed to contact the engagement feature, and constructed to drive the engagement feature in a direction parallel to an axis of the filter toward the sealing feature and urge the sealing feature into sealing engagement with the filter housing.