A human-activity-environment air-purifying apparatus is provided that draws in airflow from an ambient environment, kills germs in the airflow within the apparatus and expels purified airflow back into the environment. The apparatus has a housing with an interior chamber. An airflow enters the chamber through an inlet. From the interior chamber, the airflow is expelled through an outlet. The apparatus has a germ-killing-system that kills germs in the airflow and has an airflow-generator which causes the airflow to flow from the inlet to the outlet. In one aspect, the apparatus has a three-dimensional filter structure that has air-filter-surfaces that define a filter interior region and encompassed by the air-filter-surfaces of the filter structure. The filter is positioned in connection with the inlet so that airflow entering the inlet is dispersed into the housing interior chamber in multiple directions exclusively through the air-filter-surfaces of the three-dimensional filter structure.

A filter holder for a filter element that has an oval-shaped cross section, with a receiving section receiving the filter element, a fluid inlet and a fluid outlet. The fluid inlet is arranged such that an inflow direction of the fluid to be filtered is oriented in the direction of a lateral surface of the filter element in order to separate particles contained in the fluid onto a wall of the receiving section with the aid of centrifugal force.

A support structure for an interior volume of a construction of pleated media is operably oriented in the interior volume and structurally supports the media. The support structure can pass directly through an innermost 60% of the interior volume. It can have a void volume not more than 80%. It can be inner liner-free and extend in a non-curved path. It can include a first sheet and second sheet of porous material. At least a first brace construction secures the first sheet and second sheet together and in spaced apart, opposing relation. The support structure can include a pleated construction having pleats extending in a direction non-parallel and angled to the direction of pleats of the pleated filter media. The support structure can be molded spacers.

A filter cartridge, a safety element and fluid cleaner assembly are described. The fluid cleaner assembly generally includes a housing having a cover and a primary fluid cleaner section. The filter cartridge generally comprises z-filter media, arranged in a straight through configuration. Preferred cartridges include a seal gasket positioned to extend continuously around at outer perimeter of the straight through flow construction. The fluid cleaner assembly can have a precleaner positioned therein. Preferred features are described. Methods of assembly and use are also provided.

The present disclosure relates to a filter element comprising a filter medium pack and a support arrangement comprising at least a shell member, and wherein a portion of the shell member is thermally welded to a circumferential face of the filter medium pack. The present disclosure further relates to a method of manufacturing such a filter element, the method comprising heating at least a portion of the shell member of the support arrangement, positioning the shell member around the circumferential face of the filter medium pack, pushing the heated circumferential portion of the shell member against the circumferential face of the filter medium pack, and allowing the circumferential portion of the shell member to cool down.

A filter element (3), which has an oval cross-section in a longitudinal direction (LR) thereof and includes a circumferential sealing device (10) for, in particular, radially sealing the filter element (3) off from a filter holder (2) for the filter element (3), wherein the sealing device (3) has two first curvature sections (35, 36) arranged one facing the other and two second curvature sections (38, 39) arranged one facing the other, wherein the first curvature sections (35, 36) each have a first radius of curvature (R35, R36) and the second curvature sections (38, 39) each have a second radius of curvature (R38, R39), and wherein the first radius of curvature (R35, R36) differs from the second radius of curvature (R38, R39).

Various embodiments relate to a filter element. The filter element includes a first endplate that defines a first endplate opening and a second endplate. Filter media is positioned between and extending axially between the first endplate and the second endplate. The filter media defines a central opening extending axially therein. A support structure is disposed within the central opening of the filter media and is attached to the first endplate and the second endplate. The support structure includes an axial lobed extension that extends from a first end of the support structure to a second end of the support structure. The support structure is configured to resist collapse of the filter element.

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.

A filter element including a first endplate, a second endplate, filter media fitted between the first endplate and the second endplate, the first endplate including an opening that allows a working fluid to flow into or out of the filter media, the filter media allowing the working fluid to be filtered through the filter media and a seal member having an oval profile disposed on the first endplate and configured to seal with a filter housing, the seal member including an inner perimeter and an outer perimeter including a plurality of outwardly curved surfaces.

The invention describes a filter element for an oil separator of a crankcase ventilation system in which a filter element is configured to separate oil from fluid and that has a covering surface extending parallel to a direction of flow, together with at least one cover element covering surface in at least some regions. An oil separator is taught having the filter element with at least one pressure control valve controlling crankcase pressure and has a valve closing body that operates in conjunction with a valve seat.