A filter arrangement may include a filter element and a gasket element. The gasket element may include a substantially circular flow-through opening and a locking collar. The locking collar may be arranged along a circumference of the flow-through opening with respect to a circumferential direction. The locking collar may form a hollow cylindrical installation space. The filter element may include a filter element body and a substantially hollow-cylindrical counter locking collar. The counter locking collar may include an open axial side and a covered axial side which may be spaced apart from each other with respect to an axial axis. The covered axial side of the counter locking collar may be covered by said filter element body. The counter locking collar may be at least partially inserted into the hollow cylindrical installation space of the locking collar.

A filter device includes a filter element having a body portion surrounding a hollow interior cavity with an inner surface. A sleeve assembly having a body portion is at least partially received within the hollow interior cavity of the filter element. At least one retaining mechanism is received within the hollow interior cavity of the filter element. The retaining mechanism includes a mounting portion operably coupled to an outer surface of the body portion of the sleeve assembly. The retaining mechanism further includes an upwardly extending tab having a distal end that is engaged with the inner surface of the hollow interior cavity of the filter element to retain the sleeve assembly within the hollow interior cavity of the filter element.

A filter assembly including a housing (15) and a filter cartridge (10). The housing has a housing inlet (16) and a housing outlet (17). The filter cartridge (10) has a filter inlet (11) fluidly connected to the housing inlet (16) and a filter element (12) between a top cap (18) and a bottom cap (19). The top cap (18) and the bottom cap (19) create a circular guiding system. The bottom cap (19) has a first part (19a) that receives the filter element (12) and a second part (19b) that is connected with a mating surface (20) of the housing. The second part has a first circular section (21a) and a second section (21b) and the first section has another shape than the second section (21b), such that the bottom cap (19) cannot rotate in relation to the mating surface.

A fluid filter arrangement with filter element and fluid filter, and to filter element therefor, having an element body containing a filter means and having at least one connecting socket which is open on the front face at one end of the element body for fastening of the filter element to a through-opening in a retaining device in the fluid filter, wherein the connecting socket includes a lateral surface which is partially provided with a flattened portion and a bearing surface for a sealing ring for cooperating with an internal wall of the through-opening wherein in order to simplify mounting by ensuring secure seal, a receiving groove is provided for the sealing ring on the connecting socket, the groove base of which as a radial bearing surface for the sealing ring is having a polygonal cross section with flat portions and curved transitions alternating with one another.

Method and system for the removal of nitrogen oxides, from flue gas at low temperatures.

Method and system for the removal of nitrogen oxides, from flue gas at low temperatures.

An air filter group for air supply to internal combustion engines of motor vehicles, of a type comprising an external casing provided with an inlet opening of the air to be filtered, and an outlet opening of the filtered air, and a removable cover, the inlet and outlet openings being separated by a removable filter cartridge which comprises a hollow cylindrical filter wall crossed by the air in a centripetal direction, in which the at least a filter cartridge is fixed to the cover in which cover a chamber is present, delimited by a base provided with at least a hole at which the at least a cartridge is fixed, by an opposite wall to the base and by an annular wall located between the base and the opposite wall and comprising the outlet hole of the filtered air, the cover being destined to be inserted sealedly in the casing.

A separator for separating solid particles from a processing gas stream that has been fed repeatedly through a work machine, wherein the separator includes a processing gas inlet through which particle-laden processing gas emitted from the work machine is fed into the separator, and a filterless separator element to reduce the particle content of the processing gas and a processing gas outlet to discharge the processing gas with its reduced particle content to the work machine, the separator including a secondary stream filter, which filters a smaller portion of the processing gas, and a secondary outlet, connected thereto, which ejects the filtered secondary stream of processing gas.

A powder container including a filter that separates air and powder from each other, a hopper that includes a first opening portion installed below the filter, a second opening portion that has an opening area that is smaller than that of the first opening portion, and an inclined surface that partially overlaps the filter in plan view, a container box installed so as to be detachable from the hopper, the container box containing the powder, and a detection sensor (an optical sensor) installed outside the container box so as to oppose a side surface of the container box, the detection sensor being installed near the second opening portion and near a side of the inclined surface in a lower direction. In the powder container, the optical sensor includes a light emitting element that emits light in a direction extending along the side of the inclined surface in the lower direction so that the light transmits through an area in the side surface of the container box, and a light receiving element that receives the light emitted from the light emitting element.

Provided is a vacuum cleaner. The vacuum cleaner includes: a driver; a suctioner configured to suck external air by the driver; a discharger configured to discharge the sucked air to the outside; and a filter including a first filter provided in a flow path between the suctioner and the discharger to separate dust from the sucked air and having a first surface, a second filter having a second surface surrounding an outer circumference of the first surface, and a joint configured to join the first surface and a seam contacting the second surface.