Abstract: The invention relates to a valve and suitable hydraulic circuit, especially for camshaft adjusters of an internal combustion engine. The hydraulic circuit comprises a number of check valves or two-way valves operating as check valves, in order to provide a rapid camshaft adjuster with a high regulating quality.

Abstract: The present invention describes a new rotor and a corresponding method of manufacture for a rotor according to the invention in which a sleeve as a structural component takes over oil guidance functions in addition to locking pin bearing functions, wherein the sleeve can be inserted in a vane of the rotor flush with the surface by means of a press fit.

Abstract: The present invention describes a new rotor and a corresponding method of manufacture for a rotor according to the invention in which a sleeve as a structural component takes over oil guidance functions in addition to locking pin bearing functions, wherein the sleeve can be inserted in a vane of the rotor flush with the surface by means of a press fit.

Abstract: A camshaft adjuster which operates according to the vane-type motor principle, which means being able to move to and fro within a certain angle, generally comprises a stator and a rotor. The rotor itself is provided as a composite system of at least two components. One of the components is a cover. A further component of the composite system may be denoted as the rotor core. The cover is placed on the rotor.

Abstract: A catch for two objects moveable in relation to one another, in particular a door catch, includes a cylinder, which is operatively connected to a first object, a friction surface carrier, which is operatively connected to a second object, a friction element for creating a frictional grip between the cylinder and the friction surface carrier through an energy input. The friction element being connected to an electrical voltage supply device, wherein a change in the volume of the friction element, which constitutes an actuating movement of the friction element in relation to the friction surface, occurs as a function of the voltage applied to the friction element.

Abstract: A catch for two objects moveable in relation to one another, in particular a door catch, includes a cylinder, which is operatively connected to a first object, a friction surface carrier, which is operatively connected to a second object, a friction element for creating a frictional grip between the cylinder and the friction surface carrier through an energy input. The friction element being connected to an electrical voltage supply device, wherein a change in the volume of the friction element, which constitutes an actuating movement of the friction element in relation to the friction surface, occurs as a function of the voltage applied to the friction element.

Abstract: The invention concerns a communications device incorporated into a doll-like figure with at least one microphone, at least one speaker and communications module for exchange of data with a digital data network. The invention thus proceeds from a digital telephone, preferably a videophone. The invention creates a communications device suitable for recording and reproducing other signals in addition to conventional data, particularly sound signals. The doll-like figure containing the communications device has a base body with at least one moving part attached to the base body, and at least one adjusting motor for driving the part. The motor is controlled by a control device which receives control signals via the communications module from the data network. A movement sensor may be provided which detects a manual adjusting movement of the moving part and which is connected to the data network with a data line, thereby permitting the movement signals to be transmitted as control signals to the data network.