Abstract: The present invention relates to a device for holding, positioning and/or moving an object, with a base and with a carrier movable relative to the base, at least one magnetic bearing for generating a bearing or holding force between the base and the carrier, wherein the carrier is contactlessly supported on the base via the magnetic bearing, at least one drive acting contactlessly between base and carrier for the displacement of the carrier along the base in at least one transport direction, wherein the drive comprises a linear motor with at least one slider and one stator, which are arranged on the base and on the carrier and which, aside from a displacement force acting along the transport direction, are configured to create a counter-force between base and carrier which counteracts the bearing or holding force.

Abstract: Closure device or lock device for a vacuum chamber comprising a counter plate, which can be arranged on a vacuum chamber and surrounds an opening of the vacuum chamber, a frame, which is supported in such a way that the frame can be moved in relation to the counter plate and on which a closure cover is movably arranged, wherein the closure cover closes the opening in sealing manner in a closed position against the counter plate, at least one magnet device for producing a closing force acting between the counter plate and the closure cover, which is in engagement with the counter plate and with the closure cover.

Abstract: The invention relates to a locking device for a lock opening which is arranged in a wall between a first and a second recipient, said lock opening comprising a blocking element, which is arranged in the inner chamber of the first recipient, and a counter-plate which is associated with the blocking element. A first magnet device is provided in an area of the counter-plate and a second magnet device, which is associated with the first magnet device, is provided in the region of the blocking element. In order to close and/or open the locking device by means of the first and second magnet device, a positive and/or negative contact pressure can be produced between the blocking element and the counter-plate.

Abstract: A device for particle free handling of substrates of micro technology within mini environments under clean room conditions works friction free and thus particle free. One component of the device is movable relative to an other component in at least the x-, y-, z-axes and a ?-direction and supported and driven along each of the axes and the direction contactless electromagnetically. Transmission of energy for bearing and driving the one component is effected contactless. The device includes at least one active component and at least one passive component. A movable active component may be guided on the fixed passive component by a magnet bearing, and a drive motor which rides with the active component may be coupled with an energy supply over an electromagnetic coupling.

Abstract: A system for the metered feeding of volatile fuel components, in particular into the intake manifold of an internal combustion engine of a motor vehicle, includes an electromagnetic canister-purge valve which is actuatable in proportional pulse-width modulation, and a closed-loop control circuit with which, for the purpose of compensating for external interferences, the coil current of the canister-purge valve is adjustable. The system is characterized in that at least one device provided for detecting a variable parameter that includes at least one of a mass flow through the valve, a volume flow through the valve, a distance between the valve seat and the sealing element of the valve, and a CHx portion in the volume flow. The coil current is adjustable as a function of the parameter.

Abstract: A system for the metered feeding of volatile fuel components, in particular into the intake manifold of an internal combustion engine of a motor vehicle, includes an electromagnetic canister-purge valve which is actuatable in proportional pulse-width modulation, and a closed-loop control circuit with which, for the purpose of compensating for external interferences, the coil current of the canister-purge valve is adjustable. The system is characterized in that at least one device provided for detecting a variable parameter that includes at least one of a mass flow through the valve, a volume flow through the valve, a distance between the valve seat and the sealing element of the valve, and a CHx portion in the volume flow. The coil current is adjustable as a function of the parameter.

Abstract: A brake power assist unit for motor vehicles, the control valve of which can be electrically actuated by means of an electromagnet which actuates a third sealing seat that allows ventilation of the operating chamber. In order to stabilize the characteristic of the load system formed by the armature of the electromagnet, a sleeve that carries the third sealing seat and the valve body of the control valve by means of constructive modifications of the control valve of the externally actuated brake power assist unit, in particular, during the pressure reduction phase, the invention proposes means that allow a controlled pneumatic pressure compensation between the operating chamber and the vacuum chamber or a reduction in the force to be generated by the electromagnet during the pressure reduction phase, i.e., during the return movement of the third sealing seat from the valve body.

Abstract: A brake system for motor vehicles with an adjustable pneumatic brake force booster includes a control valve which can be actuated by an electromagnet independently of the driver's actions. A brake pressure controller generates signals which serve to actuate the electromagnet. In order to be able to implement a quick-action, low-noise pressure regulating system at low cost, the brake pressure controller (8) is formed by connecting in parallel an electromagnetic control circuit (60) that processes the nominal brake pressure signal (Pnominal) into a first current value (IA) and a regulating circuit (70) that processes a control difference (&Dgr;P) formed from the nominal brake pressure signal (Pnominal) and the actual pressure signal (Pactual) into a second current value IB, with the output variable (Inominal) of the brake pressure controller (8) being formed by adding together the two current values (IA, IB).

Abstract: In a brake system, the actuating force of a pneumatic brake power booster, which is adapted to be independently activated, is indirectly determined. For this purpose, there is provided a pressure sensor which senses hydraulic pressure introduced into a master brake cylinder connected downstream of the brake power booster, and a differential pressure sensor which senses the pneumatic differential pressure which prevails in the housing of the brake power booster. An electronic controller calculates from both sensor signals the actuating force acting at an actuating pedal.

Abstract: In a method of operating an electromechanically actuatable pneumatic brake booster, an electromagnet which actuates a sealing seat of its control valve is energized in an interval by a short current pulse of maximum current strength with a subsequent ramp-like current rise, and the current being furnished to the electromagnet is decreased when a fixed value of the pressure that prevails in a master brake cylinder connected downstream of the brake booster is reached. When the hydraulic pressure introduced into the master brake cylinder reaches a nominal value, the current being furnished to the electromagnet is supplied by a pressure controller which maintains the hydraulic pressure constant.

Abstract: A brake power booster for automotive vehicles has a control valve which is operable by a solenoid irrespective of the driver's wish. In order to adapt the force-travel characteristic curve of the solenoid to the consumer characteristic curve of the control valve exhibiting a drop in force, the present invention discloses an armature having two parts which are movable relative to each other and interact with stops that are axially offset in the housing of the solenoid in the actuating direction of the latter.