Abstract: An actuating device for machine elements that are subject to wear play, especially for brakes of railborne vehicles. The actuating device has a piston-cylinder unit operated by a pressure medium. The piston-cylinder unit has a piston rod engagable with an adjusting device configured as an adjusting nut/spindle assembly, for wear play compensation. The adjusting nut/spindle assembly has a sleeve-type adjusting nut with external toothing engagable with an automatically actuatable actuating drive. An electronic control unit generates an actuating signal for wear play compensation in dependence on the position of a brake piston connected to the piston rod. The brake piston position is measured by a sensor. The actuating signal is transmitted to the actuating drive.

Abstract: A device for operating a machine element subject to wear-related play, especially for brakes of rail vehicles, includes a pressure-medium-operated piston-cylinder arrangement having a cylinder and operating piston, the piston rod of which is actively connected to a readjustment device that compensates for wear-related play. To realize a simple and compact structure and create further prerequisites for active integration into an operating system, the readjustment device comprises a readjustment piston mounted in the piston-cylinder arrangement between the operating piston and the bottom of the cylinder and acts as a limit stop for the operating piston. For axial arresting the readjustment piston, a coaxial piston rod shoulder that faces the bottom of the cylinder and a holding element resting on the bottom of the cylinder form an arresting arrangement that permits movement of the readjustment piston toward the operating piston and blocks a counter movement of the readjustment piston.

Abstract: The present invention relates to a drive of the fluid or electric type having a device for controlling an element for transmitting a driving force to a reciprocating or otherwise moveable or displaceable element and an arrangement for damping the driving force at at least one end of the element's travel. The driving force element is at least single-acting, and the drive may also include mechanical shock absorbers and sensors arranged in the area of the ends of travel. In order to achieve an especially soft striking or contact at the end of travel position of the driving force element, the control device includes a counter-pulse module which, via a pre-positioning sensor associated with at least one movement direction, causes a chronologically settable changeover from a previously flowed-through or activated first switching element associated with a first end of travel position to a previously unactivated second switching element associated with a second end of travel position.

Abstract: A pneumatic rotary drive includes a housing which is connectable to a pressure medium source and is closed in a pressure medium-tight manner by plane covers. A rotatable shaft extends out of the housing through at least one of the covers. A belt which is in engagement with the shaft is arranged within the housing so as to form moveable pressure chambers. At least one guide body arranged within the housing is surrounded by the belt. At least one of the guide bodies is provided with a spring element for resiliently adjusting the effective circumference of the at least one guide body.

Abstract: A solenoid valve, particularly a built-in valve, having a valve housing which is provided on the end surface facing away from the installation side with means for the connection of electric lines which are outside the valve housing. The valve housing (6) is further provided with at least one electrically conductive contact track (3, 3') of the shape of a circular disc which is insulated from the valve housing and is electrically connected within the housing with the magnet (4), and a cup-shaped cover (2) can be placed over the end of the valve housing (1) having a contact track (3, 3'), the cover being provided on its inside on the bottom with at least one contacting element (5, 5') which engages under spring action with the corresponding contact track, the contacting element being electrically connected to electric lines (16) which are external to the housing.

Abstract: A pneumatic rotary drive includes a housing and at least one cover sealingly closing the housing. A rotatable shaft extends out of the housing through the at least one cover. At least one guide member is mounted in the housing. A belt mounted in the housing is in engagement with the shaft. A pressing member presses two portions of the belt together so that two expandable pressure chambers are formed. When pressure is admitted to one of the pressure chambers, the pressure chamber expands and the shaft is rotated. The belt has two ends which are located adjacent each other in a common plane and form one of the belt portions which are pressed together. The housing has an internal wall with a toothing which is in engagement with an external toothing of the belt.

Abstract: A hydraulically operated rotary drive includes a housing which is closed in hydraulically tight manner by flat covers and can be connected to a source of pressure fluid, a rotatable shaft extending through the covers out of the housing and a belt which is arranged at least in part within the housing with the formation of movable pressure chambers and is operatively connected to the shaft. In order to create a rotary drive which permits any desired extension to external structural groups as well as a modular extension to a plurality of rotary drives, it is proposed that axially extending channels (2, 2') for receiving and forwarding the pressure fluid to the pressure chambers and electrical connections be integrated within the shaft and that the shaft (3) be provided on both axial ends with coupling elements for the coupling outside the housing of mechanical and/or electrical attachment modules which can be coupled to the rotary movement.