An assembly for installing a covering over an air intake opening in engagement with a surrounding perimeter extending face. A plurality of elongated supports attached to the perimeter extending face at locations around the intake opening, each of the supports exhibiting a forwardly projecting support surface within which is configured a slot. A plurality of fasteners install through an accessible end location of each support such that a base of each fastener is retained within and traversable along an interior channel defined in said support, a projecting portion of each fastener extending from said base and through said slot. A rigid mesh exhibits a generally rectangular outline which generally matches the arrangement of the elongated supports, an aperture pattern defined in the mesh permitting the projecting portions of the fasteners to extend through the mesh to retain the mesh over the forwardly projecting support surfaces. The covering has a flexible material with perimeter defined apertures for receiving the projecting fastener portions to affix the material against an exterior surface of the mesh in engagement with the perimeter extending supports and to extend over the intake opening.

A filter assembly for installation within an aperture of an exhaust hood overlying kitchen equipment includes a filter pad and at least one insert. The filter pad comprises a material configured to absorb airborne particulates. The at least one insert is configured to support the filter pad in a generally flat configuration and the at least one insert comprises one or more perforations and one or more non-perforated portions, wherein the one or more perforated portions permit air to flow therethrough and the one or more non-perforated portions restrict the air from flowing therethrough and wherein the at least one insert is configured to cooperate with the filter pad such that the filter pad absorbs the airborne particulates in a manner that reveals a visual indicator relating to a usable life of the filter pad.

A filter system for filtering intake air of a gas turbine is presented. The filter system includes a first filter arrangement. The filter system further includes a second filter arrangement located downstream from the first filter arrangement and having a collection efficiency higher than a collection efficiency the first filter arrangement. Furthermore, the filter system includes a guard filter arrangement located between the first filter arrangement and the second filter arrangement, where a collection efficiency of the guard filter arrangement is lower than the collection efficiency of the first filter arrangement.

An assembly, kit and method for installing a covering over an air intake opening in engagement with a surrounding perimeter extending face. A plurality of fasteners are provided which can be directly secured to an air intake face, such by utilizing either of magnets or adhesives. These include each of twist and toggle lock fasteners in which a magnet or adhesive is incorporated into a base of the fastener. A further fastener variant incorporates a rigid stem with a compressible or deflectable upper enlarged head which can be resistive fitted during insertion through a grommet aperture in the filter screen outer perimeter and, once passing through the grommet, subsequently re-expanding to hold the screen in place.

A dust removal device installed on a slide rail of an automatic door is provided. The slide rail includes a slide groove on the bottom side thereof and is connected to a plurality of door panels. The slide rail includes a top plate, where a plurality of dust discharging holes is disposed. The dust removal device further includes a dust extracting case disposed on the top plate. The dust extracting includes an air passage at the inside, which communicates with the plurality of dust discharging holes. The dust removal device further includes a negative pressure device connected to the dust extracting case so as to generate a negative pressure at the inside of the dust extracting case and the air passage.

A filtering system and method for installing the system on an HVAC or computer server closet. The filtering system comprises of two horizontal rails and two vertical rails, the rails are secured together to form a rectangular structure. The rails define a channel on a front side of the rails. An air filtering screen that is placed over the front side of the rails. And, a slat that secures the air filter within the channel of the rails.

An motorcycle air intake structure includes: a container divided by a main baffle into two distinct chambers: a first chamber communicating externally and a second chamber communicating with a throttled body via a feeding duct; the two chambers separated by an air filter, positioned at the main baffle, the first and second chambers extending longitudinally side-by-side defining opposite sides of the air intake structure. The air intake further includes a pre-chamber accessing the first chamber, separated therefrom by a cross wall and communicating therewith via an access duct crossing said wall, with an inlet end thereof arranged in the pre-chamber and an outlet end thereof arranged in the first chamber, the pre-chamber arranged on the front side with respect to a forward vehicle direction. The pre-chamber includes a front access mouth; and a diverting baffle interposed between the access mouth and the inlet end of the access duct.

An air filtration apparatus includes an airflow powerhead assembly including a fan assembly and a vane assembly, a filter assembly, and a separator chamber housing inside of which the filter assembly is disposed. The separator chamber housing has a chamber inlet at a first axial side and a clean air outlet at a second axial side of the separator chamber housing opposite the first axial side. The filter assembly has a first axial end adjacent the chamber inlet and a second axial end adjacent the clean air outlet. The separator chamber housing includes at least one debris ejection slot extension configured to eject debris from an inner space of the separator chamber housing. The filter assembly includes a debris catch tray disposed at the second axial end, the debris catch tray having a debris ejection slot aligned with the at least one debris ejection slot extension.

An air filtration apparatus includes an airflow powerhead assembly including a fan assembly and a vane assembly, a filter assembly, and a separator chamber housing inside of which the filter assembly is disposed. The separator chamber housing has a chamber inlet at a first axial side and a clean air outlet at a second axial side of the separator chamber housing opposite the first axial side. The filter assembly has a first axial end adjacent the chamber inlet and a second axial end adjacent the clean air outlet. The separator chamber housing includes at least one debris ejection slot extension configured to eject debris from an inner space of the separator chamber housing. The filter assembly includes a debris catch tray disposed at the second axial end, the debris catch tray having a debris ejection slot aligned with the at least one debris ejection slot extension.

In one aspect, a modular filter assembly for filtering fluid that flows in a flow direction therethrough is disclosed. The assembly includes a first housing section having a first filter element; a second housing section having a second filter element; and a connector disposed between the first and second housing sections. A housing includes the first housing section, the connector, and the second housing section. The flow direction is through the first and second filter elements in series.