The invention relates to a flat-filter filter element for filtering a fluid, in particular for filtering air, for a filter system, in particular for an air filter system of a fuel cell system, having an arrangement of at least two flat-filter medium bodies being arranged adjacent to each other in an axial direction, so that the fluid can flow through them one after the other in the axial direction. The flat-filter filter element comprises an overmolded plastic frame that is directly molded to an outer circumference of one of the filter medium bodies, and the other one of the filter medium bodies is sealingly connected to the overmolded plastic frame by means of a circumferential cast element.

The present invention relates to a modular filter element comprising a first elongate hollow body, a second elongate hollow body and connection means for connecting the first elongate hollow body to the second elongate hollow body, wherein the connection means comprises a connection member that extends into a lower wall of the first elongate hollow body and into the upper wall of the second elongate hollow body to provide a gas-tight seal between the first elongate hollow body and the second elongate hollow body.

A vacuum cleaner, includes a dirty air inlet, a clean air outlet and an air channel arranged between the dirty air inlet and the clean air outlet. A vacuum generator is arranged inside the air channel. A first filter is arranged in the upper reach of the vacuum generator. A second filter is arranged in the upper reach of the first filter. The vacuum cleaner further comprises a state sensor. When in a second state, the first filter and the second filter are not combined, and the state sensor is not triggered. Missing mounting prevention detection of a main filter and a pre-filter can be realised at the same time by means of a micro-control switch, thereby saving on cost.

A filter for compressed air systems is provided. The filter includes a filter housing with a filter therein between an air inlet and an air outlet. Compressed air flowing between the air inlet and the air outlet passes through the filter housing and the filter element. A base is removably fastened to the filter housing which may be separated from the filter housing to allow the filter element to be removed and replaced.

A fastening system for applying, over an opening and surrounding fascia of a structure, a covering material including either of a flexible or rigid outer reinforced extending perimeter within which is configured a plurality of receiving apertures. A plurality of rails are adapted to being secured to the fascia in extending fashion proximate the opening, each of the rails exhibiting a three dimensional cross sectional shape with a forwardly projecting support surface within which is configured an outwardly facing narrowed slot for receiving a plurality of fasteners for securing the edges of the covering. An insert secures together the elongated channels in perimeter defined fashion over the intake opening. The inserts each have compression fitting sides adapted to inter-engage within the interior channels of the rails. The compression fitting sides can also include any collection of ramps, dimples, protuberances or crush portions to facilitate frictional fitting of the inserts within the channel interior following an initial disassembly of an associated kit from the intake surface, additional and replacement inserts are provided for subsequent reassembly.

An air cleaner includes: a frame member equipped at an intake port of a carburetor and provided with an air inlet port; a filter held by a holding part included in the frame member; a lid member configured to cover a front face of the filter; and a screw with a knob, the screw being configured to connect the frame member and the lid member together. The frame member is provided with an insertion hole, where the screw with the knob is inserted, on the outer side of the holding part. The lid member includes a part to be connected, to which the screw with the knob is connected, the screw being inserted into the insertion hole from a side close to the carburetor . A knob part of the screw with the knob is disposed on the inner side of a circumscribed line between the lid member and the engine.

A filter assembly for filtering a fluid is disclosed. The filter assembly comprises a filter element with an end cap, the end cap being configured for guiding the fluid to the filter element and holding the filter in a housing. The end cap comprises a first part and a second part releasably connectable to each other by an interlocking mechanism, the first part is attached to the filter element, and the second part is releasably attachable to the housing and configured for positioning the filter assembly within the housing.

A fluid filter for a motor vehicle includes a filter housing and a filter cartridge which is disposable in the filter housing. The filter housing has a housing pot and a covering element where the filter cartridge is connectable to the housing pot by rotating around a longitudinal axis of the filter cartridge. A holding element having a web is disposed on an end plate of the filter cartridge where the web protrudes from a wall of the holding element and where the wall is formed to be spiral shaped radially to the longitudinal axis. The web of the holding element is engageable behind a holding web in a mounting position of the filter cartridge where the holding web projects at a constant distance from a wall, formed to be spiral shaped radially to the longitudinal axis, of a counter bearing disposed on the housing pot.

A fastening system for applying, over an opening and surrounding fascia of a structure, a covering material including either of a flexible or rigid outer reinforced extending perimeter within which is configured a plurality of receiving apertures. A plurality of rails are adapted to being secured to the fascia in extending fashion proximate the opening, each of the rails exhibiting a three dimensional cross sectional shape with a forwardly projecting support surface within which is configured an outwardly facing narrowed slot for receiving a plurality of fasteners for securing the edges of the covering. An insert secures together the elongated channels in perimeter defined fashion over the intake opening. The inserts each have compression fitting sides adapted to inter-engage within the interior channels of the rails. The compression fitting sides can also include any collection of ramps, dimples, protuberances or crush portions to facilitate frictional fitting of the inserts within the channel interior following an initial disassembly of an associated kit from the intake surface, additional and replacement inserts are provided for subsequent reassembly.

An apparatus and methods are provided for an air cleaner to be mounted onto an air inlet of an internal combustion engine. The air cleaner comprises an air filter that includes a filter medium disposed between a curved base and a cover. The curved base provides an interface between the air filter and the air inlet, and comprises a shape that provides clearance between the curved base and an electric choke installed onto a carburetor comprising the air inlet. The cover secures the air filter and the curved base to the air inlet such that an airstream is drawn through the filter medium and is conducted into the air inlet. A raised portion of the cover is configured to cooperate with the curved base to ensure a desired volume of the airstream is available to the air inlet at substantially all engine speeds.