Abstract: An air filter includes a housing having an air inlet and an air outlet. A filter element is insertable into the housing. The filter element includes a filter medium folded in an accordion-like manner, as well as a surrounding seal for sealing off a pure-air area. The air inlet of the housing has the same cross-section as that of the filter element. Holders are arranged on the housing via film hinges. The holders operate to fix the filter element in an installed position in the housing.

Abstract: An arrangement for controlling the temperature of the intake air of internal-combustion engines has an intake air filter in which a swivellable control valve is provided that interacts with a pneumatic actuator. The actuator causes an adjustment of the control valve by a bimetallic control device, as a function of the air temperature fed to the internal-combustion engine. A thermostat is provided which, by way of a movable stop, determines the swivel range of the control valve in the direction that closes off the warm-air duct. The thermostat is arranged in a receiving device. This receiving device is fastened in a cold-air duct by a welded connection.

Abstract: A filter system for filtering the air intake of an internal combustion engine including a housing having a bottom half and a cover half, at least two filter inserts each consisting of pleated filter paper or filter batting, and a circumferential gasket. The two filter inserts are connected by a junction strip which simultaneously seals the raw air chamber from the clean air chamber between the two filter inserts.

Abstract: A suction air filter for a combustion engine includes a filter housing for receiving a filter insert and an attachment housing to which the filter housing is attached. The filter housing has a coupling end for coupling with a corresponding coupling end of the attachment housing. The suction air filter has an unfiltered air intake and a pure air outlet. A plurality of cam members are mounted on the outside of the filter housing near the coupling end thereof, and a plurality of cam elements are mounted on the outside of the attachment housing near the coupling end thereof. A rotatable coupling ring is mounted to receive the coupling ends of the filter housing and the attachment housing, and the coupling ring carries wedge members which are engagable with the cam members and the cam elements to releasably couple together the coupling ends of the housings.

Abstract: A tension clamp for releasably joining two components. The clamp is anchored on a first component 10 by a mounting element 18 and is hooked onto the second component 11. The mounting element 18 is inserted under resilient bias into securing elements 17 on the first component, and has a resilient portion which produces the tension forces for joining the two components 10 and 11. The locking hook 20, which hooks onto the second component 11, is connected to the mounting element 18 by an intermediate link 19 and is preferably a plastic injection molding.

Abstract: An intake air filter for an internal combustion engine is disclosed which includes a housing having a raw air inlet for unfiltered air and a clean air outlet for filtered air and first and second annular filter inserts disposed concentrically one inside the other within the housing through which air flows radially from the outside to the inside, the first filter insert being an outer filter insert, and the second filter insert being a safety cartridge disposed within the first filter insert, the second filter insert being closed at one end with a cover plate; the other end of the second filter insert facing the air outlet, and the second filter insert being secured to the housing by a screw thread adjacent the air outlet.

Abstract: An air intake filter containing a filter insert within a canister. The canister includes a raw air inlet and an opening for the introduction of the filter insert, the filter insert having a sealing surface parallel to the plane of the opening to seal the clean-air side. This sealing surface is applied to another sealing surface on an adapter with a sealing ring interposed therebetween, and the canister is fastened to the adapter. To prevent any shearing movement on the sealing ring when the canister is attached to the adapter, a guide is provided on the adapter and is engaged by a sliding shoe disposed on the canister. Furthermore, a spacer is situated on the canister and assures that the canister cannot be laid against the adapter unless the two sealing surfaces are correctly positioned with respect to one another.

Abstract: An air intake filter for internal combustion engines has a flat, replaceable filter insert through which air passes transversely in operation, and which can be inserted from one side into a filter housing. The filter insert has a gasket arranged on its periphery for sealing an end face of the filter insert against a lip on the filter housing. Sealing pressure is exerted by ledges on lateral portions of the filter housing which slant toward the filter insert in the direction of insertion. To prevent the gasket from being displaced laterally with respect to the lip on the filter housing when the sealing pressure is applied, the filter insert is received in a substantially open-faced frame.

Abstract: A housing, such as an air filter housing, with a plastic attachment tab is provided with a releasable, one-piece, U-shaped attachment clip engaging in a through aperture in the attachment tab and having sleeves formed in the vicinity of the through aperture on the inside of each leg of the U-shaped clip, and at least one resilient tongue on each leg of the clip pressing against the attachment tab.

Abstract: A quickly releasable clamping lock of the knee lever type, usable to clamp a filter cover to the filter housing of an engine air intake filter, the lock assembly comprising a curved hook member whose one extremity engages the filter cover and whose other extremity is pivotably attached to a knee lever, the latter in turn, being pivotable about a pivot anchor which, like the hook member and the knee lever, is a U-shaped wire part with angled-off anchoring trunnions engaging transverse apertures in the wall of the filter housing. The pivot connection between the pivot anchor and the knee lever is formed by wire loops in the leg portions of the pivot anchor and by angled-off pivot trunnions on the wire extremities of the knee lever. Alternatively, the pivot anchor may be a U-shaped stamping with angled-off lugs in the place of the anchoring trunnions and bores in the place of the wire loops.

Abstract: A device for adjusting the intake air temperature of carburetor-equipped internal combustion engines having an air intake system with a flapper valve in a duct junction admitting cold raw air and/or preheated raw air to the intake filter, depending on the raw air temperatures, the flapper valve position being controlled by a pneumatic membrane actuator receiving negative pressure from the intake manifold, via a vacuum line with a thermostat-controlled relief valve responsive to the temperature of the air mixture. In the drive connection between the membrane actuator and the flapper is arranged a wax thermostat which increases or decreases the effective length of the connection in response to the ambient air temperature, thereby adding the thermostat displacements to the actuator displacements.