Abstract: A filter having a filter element disposed in a filter housing; the filter element being formed of a pleated filter paper or a nonwoven filter material and being of substantially planar or flat configuration. Sealing elements in the form of a rolled seal are provided on at least two lateral surfaces of the filter in order to seal the filter element in the filter housing.

Abstract: A filter insert for the filtering of the fresh air supplied to a motor vehicle interior has an accordion-folded filter element which is self-supporting. Lateral strips coated with an adhesive are provided on the faces which extend on the left and on the right. On the faces which extend in parallel to the folding, angle strips are arranged whose first leg extends along at least three fold edges. The filter element is surrounded along the faces by a foamed-material sealing.

Abstract: A throttle device is described, in particular a throttle valve in a suction pipe of an internal-combustion engine. This throttle device consists of a housing, a throttle valve control, a position sensor and a throttle valve fastened to a throttle valve shaft. The throttle device is arranged between the clean-air-side air filter connection and the suction pipe of the internal-combustion engine. The air filter connection and/or the suction pipe consist of a plastic material, and the individual elements of the throttle device are constructed as modules which can be fitted, screwed or clamped together.

Abstract: A differential pressure switch particularly suitable for monitoring dirt accumulation on a filter element of an oil-separating air filter comprising a piston which is movable in response to a relative change in pressure between two pressure zones and is biased in one direction by a restoring spring, and a rolling membrane which separates the pressure zones.

Abstract: A method for drying the surface of a tool, particularly an injection molding tool, by feeding dry air from a drying device into a lower area of a chamber defined by a housing enclosing the tool. Moist air is removed from an upper area of the chamber and returned to the drying device, where moisture is removed from the air.

Abstract: A crankcase ventilating system for an internal combustion engine includes a vent line issuing from the crankcase and connected to a liquid separator. The liquid separator has a collecting chamber for separated liquid and at least two drain lines returning to the crankcase. The liquid separator also has a connection leading to the vacuum line of the internal combustion engine.

Abstract: A plastic intake manifold assembly for an internal combustion engine, and a method for its production. The assembly is in the form of a hollow plastic structure composed of two housing pieces in which a resonance chamber cross section is formed by means of an insert in the housing interior. Mating surfaces on the housing pieces are bonded together, for example by friction welding or ultrasonic welding. The invention has the advantage that by using inserts of differing size, resonance chambers of different sizes can be produced without altering or modifying the housing pieces.

Abstract: A closure device for the discharge outlet of a bulk material conveying unit which operates under vacuum. The outlet has a circular cross-section, and the outlet opening of the conveying unit is closed by means of a freely movable closure element, particularly a ball. The closing effect is achieved by means of a vacuum in the conveying unit. In the open position, i.e. after the vacuum is switched off, the ball moves downward and rests on a supporting device and thereby forms an annular discharge outlet cross-section which is interrupted only by the struts of the supporting device.

Abstract: A belt filter device for the cleaning of contaminated liquids has an upper dirt chamber which receives the contaminated liquid. Underneath this dirt chamber, a clean chamber is arranged. Between the dirt chamber and the clean chamber, a filter bottom is provided which has a passage opening for the liquid and on which a revolving filter belt is arranged so that it can be moved along automatically as a function of the amount of contaminations deposited on it. Outside the dirt chamber, a cleaning device is arranged which removes the contaminations situated on the filter belt. The cleaning device has at least one spray head which is arranged on the rear of the filter fabric and above the level of the contaminated liquid so that the dirty cleaning liquid is supplied directly to the contaminated liquid.

Abstract: The proposal is for a suction pipe consisting of a number of individual suction pipes (10, 16, 17, 18) connected on the intake side to a manifold (11). According to the invention, the manifold is made in one piece with the suction pipes by the blow-molding method.

Abstract: A backwashable fluid filter formed with a filter element which is disposed so that it can be rotated about its axis inside the filter housing by a drive mechanism and through which a radial flow passes. A backwashing device is provided which includes a dirt removal channel which extends parallel to the axis of the filter element. When the filter element is backwashed, clean fluid flows back through the filter element, removes dirt particles adhering to the filter element and carries them into the dirt removal channel. In order to pre-clean the filter element, a resiliently mounted stripping device is arranged in front of the backwashing device to remove coarse dirt from the surface of the filter element before it reaches the backwashing device. The filter element is provided with slit-like openings, each of which has a substantially U-shaped configuration and defines a resilient tongue.

Abstract: An air filter, particularly for ventilating the interior of motor vehicles, is provided. The air filter includes a housing having an unfiltered-air inlet and a clean-air outlet, as well as a filter medium folded in an accordion-like shape. The filter medium is arranged in a filter insert which has a surrounding seal. An adapter is integrated in the housing and also includes a surrounding sealing device to provide an effective seal between the unfiltered-air and clean-air sides of the housing. The filter insert is arranged in the adapter and is fixed in position via a cover flap of the housing.

Abstract: An intake assembly for a multi-cylinder internal combustion engine which has at least first and second intake ducts of different lengths for each cylinder which proceed from an intake distributor and converge shortly before an intake valve. The shorter second intake duct is provided with a shut-off device formed by a control shaft which extends along the whole length of the laterally adjacent second individual intake ducts and at least one end of which is mounted in a radially freely movable manner.

Abstract: A liquid filter includes an openable filter housing. The liquid filter has an unfiltered-liquid inlet and a clean-liquid outlet. A first filter element is arranged in the filter housing. The first filter element has an essentially hollow-cylindrical design, with the liquid flow travelling through it from the outside to the inside. An additional hollow-cylindrical filter element is arranged inside of the first filter element, wherein the liquid flow is also from the outside to the inside through the additional filter element. A separating wall is disposed between the two filter elements. The entire filter has a compact construction with a large effective filter area.

Abstract: An activated carbon filter is provided for venting a fuel tank. The activated carbon filter consists of a housing which accommodates activated carbon packets. Via lines, the housing is connected, on the one hand, by way of a first connection with the fuel tank, and on the other hand, by way of a second connection with the intake pipe, particularly that of a combustion engine. A third connection connects the housing with the atmosphere. The housing has a first partition which extends between the connection for the atmosphere and the connection for the tank. At least one other partition is provided which forms at least one other chamber. Each of the chambers is filled with activated carbon.

Abstract: A toggle catch for the closing of first and second housing parts of intake air filters for machines which take in air has a toggle lever which pivotally engages in a bearing opening of an abutment, and a hook part. This hook part is pivotally fixed on the toggle lever. The hook part reaches over a projection of the first housing part. A spring band element is provided that has an end-face ear forming the abutment. The spring band element has a hook-shaped end that is engageable in a form-locking manner in a recess of the second housing part.

Abstract: An integrated air intake system, particularly for the combustion air of an internal-combustion engine, which comprises a plastic housing (10), an air intake manifold, an air filter (21) and at least one additional electric and/or mechanical component. The housing is constructed of a plurality of shells and is formed with a bottom part (37) and a top part (38) divided by a parting plane extending along the intake manifold (23). The air filter is arranged in an unfiltered air chamber in the top part, and a cover (12) on the top part closes off the unfiltered air chamber and secures the air filter therein.

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 oil separator for the gases of the crankcase ventilating system of an internal-combustion engine has a filter element through which the breathing gases flow and from which the separated oil is returned via an oil return into the oil tank 4. The blow-by gases, from which the oil was removed, are supplied to the air intake system of the internal-combustion engine. A vacuum generator is provided which generates a specified constant vacuum for the sucking-off of the blow-by gases. In addition, an air oil removal element that separates the oil has microfibers which are made of fiber glass material.

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.