The disclosure concerns air cleaners. Preferred air cleaners are shown which include a housing and a removable and replacement primary filter cartridge. Optional and advantageous features are shown. The preferred primary filter cartridge is conical in shape. A preferred optional safety or secondary filter cartridge is shown. Preferred methods of assembly and use are provided.

A filter support for a filter is adjustable to modify the size and/or shape of the filter. The filter support may include one or more wedges engaging a wall of the filter, and a connector connecting the one or more wedges to one another. The connector allows selective adjustment of the filter support.

An apparatus and method are provided for a flangeless air filter configured to be mounted onto a flat surface within an air intake system of an internal combustion engine. The flangeless air filter is comprised of a cone-shaped filter medium, retained between a base and a cap, that is fabricated to remove contaminants and particulate matter from an intake airstream. The base includes a pliable seal that forms an airtight connection between the flangeless air filter and the flat surface of the air intake system. A mounting bracket and fasteners may be used to attach the base to the flat surface, compressing the seal there between. In some embodiments, the mounting bracket may be incorporated into, and made a part of the base. A cap is disposed on a top of the flangeless air filter and configured to direct the intake airstream around the cap and toward the filter medium.

Systems and methods of filtering with filter assemblies including a frame having a header structure, an end cap structure, and a plurality of side plates coupling the header structure to the end cap structure are provided. The filter pleated media may include an upstream surface and a downstream surface opposite the upstream surface in a direction of flow through the filter assembly, and the filter pleated media may include a pleated configuration. The filter assemblies may further include a support member coupled to a portion of the frame and along at least one of the upstream surface or the downstream surface of the filter pleated media. The support member may at least partially penetrate the pleated configuration and extend into a pleat of the pleated configuration of the filter pleat media.

A dust filtering and collection system for filtering dust and other debris particles from an incoming dust laden air stream, such air stream generally being used for conveying granular material into or from a bulk tank trailer, a railroad car, or other conveying vehicle, the filtering system designed to be functioned by vacuum air pressure, operatively generated by a blower, to draw in the soiled air into the filter system, to cleanse such air for further use in the conveying of the granular material. The air flow may be reversed, to provide for a dislodging of any dust particles from the filtering system, and to cleanse the filter for further efficient usage of the system in conveying granular material into or out of the tank trailer, or other vehicle during usage. The filter system includes a pod of filter tubes encapsulated by a polymer header that mounts to a transverse plate that secures to the approximate upper end of the filter canister of the filtration system.

An external brace for a filter element is described. The brace is configured to wrap around an exterior of a filter element having a filter media pack. The brace helps to support the filter media pack during filtering operations by preventing outward flexing of the filter media pack caused by fluid flowing through the filter media. In some arrangements, the brace interfaces with a filtration system housing to provide additional support to the filter element.

A cylindrical filter element having a central longitudinal axis and filter media including a plurality of radially extending pleats arranged in a pattern that repeats around the central longitudinal axis. Each of the pleats comprises an inner pleat tip, wherein the inner pleat tips of each pattern define an open area that extends along a height of the filter element, and wherein each pattern of pleats comprises a first series of intermediate pleats that descends in length from a major pleat to a minor pleat and a second series of intermediate pleats that ascends in length from the minor pleat to a major pleat of an adjacent pattern of pleats.

An air filter guard includes a downwind rim that supports an air filter in a filter box of an HVAC air handler. The downwind rim prevents the air filter from deforming, bending, or buckling to create gaps that allow air to bypass the air filter. In particular, the air filter guard prevents an air filter from deforming, bending, or buckling even when the air filter is overdue for replacement and clogged with dust. The air filter guard acts as a sleeve in which an air filter is inserted. The air filter guard and air filter are then placed in the filter box of an air handler. The air filter guard has inner dimensions that are large enough to receive the air filter while the outer dimensions of the air filter guard are small enough to fit within the filter box.

A filter element for filtering a fluid has a support pipe and a filter bellows arranged about a longitudinal axis on the support pipe. The filter bellows has folds with radially outer fold edges. The filter bellows has a first axial end and a second oppositely positioned axial end. The filter bellows has a notch at least at one of the first and second axial ends. An axial length of the notch in longitudinal direction is shorter than a longitudinal extension of the filter bellows. The support pipe has a support structure at the axial end with the notch and has at least two wings. The support structure is oriented radially away from the support pipe and is integrated into the end disk at both sides of the notch. A filter system with such a filter element arranged in a housing is provided.

A cylindrical filter element including a central longitudinal axis extending along a height of the filter element, a core element extending along at least a portion of the height of the filter element and having a convex curved central portion extending from a first end to a second end to define a width of the core element, wherein the convex curved central portion has a maximum height through the central longitudinal axis that is larger than a height of at least one of the first and second ends, and filter material including a plurality of pleats extending radially from an outer periphery of the core element, wherein an outer cylindrical periphery of the filter material is defined by an outer pleat tip of each of the plurality of radially extending pleats, and wherein an inner pleat tip of each radially extending pleat is adjacent to the core element.