Abstract: A motor vehicle hydraulic brake system master cylinder, having at least one piston which is arranged in a housing and displaceable along an axis as a result of brake actuation and to which a pressure chamber which can be connected to wheel brakes, and a refill chamber is assigned, wherein the pressure chamber in the non-actuated state can be connected to a fluid reservoir via a compensating bore and on actuation of the brake can be isolated therefrom by means of a cup seal arranged on the piston in order to build up pressure. The master cylinder having a cup seal arranged in a radially open, encircling groove of the piston which groove is formed by a first and a second radially encircling projection, wherein when the brake actuation is released additional fluid is drawn from the refill chamber in the direction of the pressure chamber via the second projection.

Abstract: A brake disc for a disc brake of a motor vehicle includes a pot-shaped carrier part; a friction ring, and multiple connecting elements distributed in circumferential direction of the disc brake extending in radial direction, and configured as separate components, wherein the carrier part and the friction ring are fixedly interconnected in radial direction via the multiple connecting elements, wherein the connecting elements are form fittingly connected with the carrier part and with the friction ring.

Abstract: A brake disc for a disc brake of a motor vehicle includes a pot-shaped carrier part; a friction ring, and multiple connecting elements distributed in circumferential direction of the disc brake extending in radial direction, and configured as separate components, wherein the carrier part and the friction ring are fixedly interconnected in radial direction via the multiple connecting elements, wherein the connecting elements are form fittingly connected with the carrier part and with the friction ring.

Abstract: A motor vehicle hydraulic brake system master cylinder, having at least one piston which is arranged in a housing and displaceable along an axis as a result of brake actuation and to which a pressure chamber which can be connected to wheel brakes, and a refill chamber is assigned, wherein the pressure chamber in the non-actuated state can be connected to a fluid reservoir via a compensating bore and on actuation of the brake can be isolated therefrom by means of a cup seal arranged on the piston in order to build up pressure. The master cylinder having a cup seal arranged in a radially open, encircling groove of the piston which groove is formed by a first and a second radially encircling projection, wherein when the brake actuation is released additional fluid is drawn from the refill chamber in the direction of the pressure chamber via the second projection.