back plate 22 of the brake lining 20 this projection is designated by the reference numeral 52 in the exemplary embodiment shown it is constructed in the shape of a retainer spring for which reason the retainer spring 52 is also cited in the following the retainer spring 52 is shaped exactly like the retainer spring 28 they are constructed in one piece with one another the retainer spring 52 has a middle area 54 and two lateral spring shanks 56 58 with a passage opening 60 respectively 62 a slot 64 is located between the spring shanks 40 and 58 a slot 66 is located between the spring shanks 38 and 56 as a result the spring shanks can swing out independently from one another in contrast thereto however spring shanks adjacent to one another can also be constructed without a slot located between them in the assembled state projections 68 70 of the pressure plate 34 extend through the openings 60 and 62 of the retainer spring 52 forming the projection in order to couple the pressure plate to the retainer spring in the direction of tensioning here no rebound limitation is provided in the exemplary embodiment shown in the exemplary embodiment according to fig6 the middle area 36 and 54 of the retainer springs 28 and 52 are designed level in contrast to which in the exemplary embodiment according to fig2 it represents and forms a radial projection facing outwards which embodiment is used in practice is decided.