Internal gear pump for a brake system

An internal gear pump for a brake system, in the pump housing of which an internally toothed ring gear and a pinion, meshing with toothing of the ring gear, are rotatably supported about parallel axes, as a result of which their sets of teeth define an annular chamber, which tapers in approximately crescent-shaped fashion and in which a filler piece braced toward the suction side of the pump is disposed, the filler piece having two circumferential sides, curved in accordance with a tip circumference of the ring gear toothing or the pinion toothing, which rest sealingly, under a spring load, on a plurality of tooth tips covered by the circumferential sides, wherein one of the two circumferential sides of the filler piece is formed by a radially resilient circumferential wall, which as a consequence of their sagging based on intrinsic spring force conforms to the tooth tips, covered by the one of the circumferential sides, of the pinion or ring gear;

• wherein both circumferential sides of the filler piece are formed by a radially resilient circumferential wall, as a result of which one circumferential wall conforms resiliently to the tooth tips of the pinion which are covered, and the other circumferential wall conforms resiliently to the tooth tips of the ring gear which are covered;
• the radially resilient circumferential walls on a braced end of the filler piece are connected to one another via a supporting wall, from which they protrude freely in the form of legs;
• the two circumferential walls and the supporting wall are formed by pre-bent longitudinal segments of a one-piece leaf spring of spring steel;
• and
• wherein a middle leg of the filler piece, which forms the supporting wall, is provided with a central indentation.