Abstract: The invention relates to a centrifugal pump comprising a spiral housing consisting of a first housing part and a second housing part, the latter being tubular and delimited in a region facing away from the inlet E of the inflowing medium in order to receive the rotor in its interior in a wet chamber N. A stator surrounds the second housing part and is situated in the dry chamber T in the vicinity of the exterior of the rotor (3). The tubular delimitation of the second housing part is provided with a cover, a first seal being located between the cover and the second housing part. Said seal comes into contact with the environment on at least one side facing away from the wet chamber N. The invention also relates to the use of the centrifugal pump as a coolant centrifugal pump in a motor vehicle.

Abstract: A centrifugal pump includes a spiral housing with a first housing part and a second housing part. The central region of the second housing part is cup-shaped in order to receive the rotor situated in a wet chamber and forms a bearing at the base of the cup-shaped region rotatably mounting the rotor. A stator surrounds the second housing part and is situated in a dry chamber in the vicinity of the exterior of the rotor.

Abstract: Disclosed is a subunit having a hollow cylinder which is provided with an opening on at least one face and in which a spring bearing is arranged on the inside of the face and a first valve spring resting against said spring bearing. A shaft that is guided within the spring bearing is disposed in the first valve spring so as to be reversibly movable in the direction of the longitudinal axis of the hollow cylinder. A thrust bearing for the first valve spring is located at the end of the shaft, which faces away from said face of the hollow cylinder, the thrust bearing being connected to the shaft. A second valve spring is placed between the thrust bearing and the interior on the opposite face of the hollow cylinder.

Abstract: The present invention relates to a cover unit which includes a cover made of an aluminum alloy. The cover has a wall thickness of 1 to 2 mm and has at least one hollow pin on one side as well as an aperture. A plate-shaped plastic part provided with holes and a plug which projects through the aperture and is connected to the cover via at least one hollow pin. When attached, the plastic part holes engage the hollow pin(s) and the pin(s) are deformed so as to ensure a secure attachment. The invention also relates to a method of making the cover unit described above.

Abstract: A method for arranging a valve element in an additional control valve device includes provides that, after a first position has been set, a valve plate is pushed onto the stem until the valve plate contacts the stop of a trapping magnet. The valve plate is then connected to the stem. This ensures that the fabrication tolerances are completely compensated by virtue of the first valve spring and the guiding of the valve element. After the second counter bearing has been secured in the guide, the holding of the first counter bearing in the previously determined first position is cancelled, which is then generally carried out by removing the tappet from the guide. After this has been done, the valve element automatically assumes a central position between the gantry magnet and the trapping magnet in the currentless state of the additional control valve device owing to the spring forces which then act.

Abstract: Disclosed is a subunit consisting of a hollow cylinder (1) which is provided with an opening on at least one face and in which a spring bearing (2) is arranged on the inside of said face, a first valve spring (3) resting against said spring bearing (2). A shaft that is guided within the spring bearing (2) is disposed in the first valve spring (3) so as to be reversibly movable in the direction of the longitudinal axis of the hollow cylinder (1). A thrust bearing (5) for the first valve spring (3) is located at the end of the shaft (4), which faces away from said face of the hollow cylinder (1), said thrust bearing (5) being connected to the shaft (4). A second valve spring (6) is placed between the thrust bearing (5) and the interior on the opposite face (1a) of the hollow cylinder (1).

Abstract: A method for arranging a valve element in an additional control valve device includes provides that, after a first position has been set, a valve plate is pushed onto the stem until the valve plate contacts the stop of a trapping magnet. The valve plate is then connected to the stem. This ensures that the fabrication tolerances are completely compensated by virtue of the first valve spring and the guiding of the valve element. After the second counter bearing has been secured in the guide, the holding of the first counter bearing in the previously determined first position is cancelled, which is then generally carried out by removing the tappet from the guide. After this has been done, the valve element automatically assumes a central position between the gantry magnet and the trapping magnet in the currentless state of the additional control valve device owing to the spring forces which then act.

Abstract: The valve element is composed of a valve stem, at one of whose ends a valve head is arranged, said valve head being of concave design in the direction of the valve stem, having on the outside a continuous annular region and having at least two cutouts between the annular region and the central connection point for connecting to the valve stem which are closed off by at least one closure part.

Abstract: The valve element is composed of a valve stem (1), at one of whose ends a valve head (2) is arranged, said valve head being of concave design in the direction of the valve stem (1), having on the outside a continuous annular region (2a) and having at least two cutouts (2d) between the annular region (2a) and the central connection point (2c) for connecting to the valve stem (1) which are closed off by at least one closure part (3).

Abstract: The present invention relates to an actuating device with an electromotive rotary drive, via which an actuating element can be driven rotatably about an axis of rotation between a first end position and a second end position and can be acted upon out of the first end position by a spring. The electromotive actuating drive includes a reversing drive and the spring action upon the actuating element is effective between the first end position and an intermediate position. The spring action is ineffective between the intermediate position and the second end position. The intermediate position lies between the first end position and the second end position.

Abstract: The present invention relates to an actuating device with an electromotive rotary drive, via which an actuating element can be driven rotatably about an axis of rotation between a first end position and a second end position and can be acted upon out of the first end position by a spring. The electromotive actuating drive includes a reversing drive and the spring action upon the actuating element is effective between the first end position and an intermediate position. The spring action is ineffective between the intermediate position and the second end position. The intermediate position lies between the first end position and the second end position.

Abstract: The present invention relates to a cover unit which includes a cover made of an aluminum alloy. The cover has a wall thickness of 1 to 2 mm and has at least one hollow pin on one side as well as an aperture. A plate-shaped plastic part provided with holes and a plug which projects through the aperture and is connected to the cover via at least one hollow pin. When attached, the plastic part holes engage the hollow pin(s) and the pin(s) are deformed so as to ensure a secure attachment. The invention also relates to a method of making the cover unit described above.

Abstract: An electromechanical drive mechanism is disclosed and includes a driving electromotor provided with a rotatable driving first axis, and mechanical transmission driven by the rotatable driving first axis, for through converting a first rotary movement of the rotatable driving first axis into a second rotary or linear movement of an actuator member driving a mechanical actuator along a range of actuator positions. The drive mechanism is furthermore provided with an forceback facility for effecting a return force on the drive mechanism towards a fallback position. The drive mechanism is furthermore mounted in a housing facility. In particular, the drive mechanism has the forceback facility operated in a mechanical manner and includes a return spring that is arranged for effecting a rotary return force on a rotatable axis that forms part of the mechanical transmission.