Patent ID: 8579619

Claim:
An internal gear pump for a brake system comprising: a pump housing; an internally toothed internal geared wheel supported in the pump housing and having internal teeth; a pinion supported in the pump housing and having pinion teeth that mesh with the internal teeth of the internal geared wheel; and a longitudinally braced filler piece, wherein the internal geared wheel and the pinion are supported rotatably about parallel axes, as a result of which the internal teeth and the pinion teeth define a pump chamber which tapers in approximately crescent-shaped form and in which the longitudinally braced filler piece is disposed, wherein the longitudinally braced filler piece includes circumferential faces that are curved virtually correspondingly to a tip circle of the internal teeth of the internal geared wheel or of the pinion teeth, and the circumferential faces rest sealingly on a plurality of tips of teeth covered by the circumferential faces, wherein over a longitudinal region of the filler piece, a radial supporting force operates to seal off a circumferential face of the filler piece from tips of teeth bracing the circumferential face, wherein a clearance fit is defined between the circumferential faces of the filler piece and opposed tips of the internal teeth and of the pinion teeth so that a play is imposed on the filler piece, wherein the play is eliminated in some regions of the filler piece by supporting forces acting on the filler piece in opposite radial directions at a spacing from one another, and wherein the filler piece is a two-armed lever, supported pivotably and fixed translationally in a middle region of the two-armed lever, and the filler piece pivots between the internal geared wheel and the pinion to force regions of the filler piece into contact with the tips of the internal teeth and the pinion teeth.