Abstract: A disc brake for a commercial vehicle is provided. The disc brake includes a brake caliper which engages over a brake disc and is in the form of a sliding caliper, two brake pads which are arranged in the caliper, are movable in opposite directions and each have a pad carrier plate and a friction lining fastened thereon and of which an application-side brake pad is pressable against the brake disc by an application device via at least one brake plunger, and with at least one restoring device with which the brake caliper is returnable after a braking-induced displacement and release of the brake. The restoring device is provided with a friction element which is mounted in the brake pad so as to be displaceable to a limited extent under pressure loading in the axial direction of the brake disc and on which an elastic pressure element held in the brake caliper and/or brake plunger acts.

Abstract: A wear adjustment device is provided for the adjusting friction surface wear on a brake pad and a brake disc of a disc brake having a brake application device, preferably with a rotary lever. The wear adjustment device can be coupled on the drive side to the brake application device, and on the output side to a spindle unit. A respective rolling body arrangement is axially arranged on both sides of a drive element, one of which is designed as a roller bearing and one is designed as a ball ramp coupling. A central shaft is coupled to the ball ramp coupling and has an output interface for coupling to the spindle unit. A radial freewheel is coupled to the ball ramp coupling by an overload spring unit and to the central shaft. A directionally-dependent torque device is provided, along with a housing in which the drive element, the rolling body arrangements, the overload spring unit, the radial freewheel, the central shaft and the directionally-dependent torque unit are arranged.

Abstract: A disc brake for a commercial vehicle is provided. The disc brake includes a brake caliper which engages over a brake disc and is in the form of a sliding caliper, two brake pads which are arranged in the caliper, are movable in opposite directions and each have a pad carrier plate and a friction lining fastened thereon and of which an application-side brake pad is pressable against the brake disc by an application device via at least one brake plunger, and with at least one restoring device with which the brake caliper is returnable after a braking-induced displacement and release of the brake. The restoring device is provided with a friction element which is mounted in the brake pad so as to be displaceable to a limited extent under pressure loading in the axial direction of the brake disc and on which an elastic pressure element held in the brake caliper and/or brake plunger acts.

Abstract: A light barrier arrangement for detecting objects in a monitored area includes first and second casings adapted for being arranged at opposite ends, respectively, of the monitored area. Each casing comprises a basic body having longitudinal ends. End caps close off the longitudinal ends of the basic body for the casing. Optical elements are integrated into the end caps and generate a predetermined number of beam axes formed, respectively, by emitted light rays.

Abstract: A circuit arrangement for testing of a tristate detection circuit has controllable switches (3-6) which simulate the three states: logical “1”, logical “0”, and high-impedance on a terminal (K1). Inputs (P1, P2) from comparators (1, 2) of the detection circuit are set to supply voltage or to ground. Switching of the comparators (1, 2) on and off is checked independently of the state on the terminal (K1).

Abstract: A photoelectric barrier and operation thereof, the barrier having at least two pairs of transmitters/receivers each operating synchronously. Each of the two transmitters transmits a light signal having a specific identifier, the signal being in the form of a double pulse separated by a pause, which double pulse consists of two pulse groups each separated by a pause, and each receiver then evaluates a light signal of the associated transmitter as correctly received when at least one of the two pulse groups is recognized as valid by means of the associated identifier, in which the duration of the pulse groups and the pauses between them are established so that at most one pulse group of one double pulse of the one transmitter is superimposed with one pulse group of one double pulse of the other transmitter.

Abstract: Pre-stressed polyethylene foil is shredded mechanically in a closed vessel, whereby it is heated until it shrinks and its surface becomes tacky. When latex is sprayed into the vessel, a thin rubber layer covers each foil fragment and is thermally welded to the polymer surface. The rubber layer traps pockets of aqueous latex in voids of the shrunken foil. The weight and bulk of the resulting material are much greater than the corresponding properties of its rubber content so that precisely measured amounts of rubber may be dispersed quickly and uniformly in hot asphalt for improving the properties of a road surface made from the asphalt mixture. The water content of the rubber-coated plastic fragments improves the working properties of the asphalt mixture.