Patent ID: 9028232
Filing Date: 2015-05-12
Classification: F04C

Abstract:
1. An internal gear pump for a hydraulic vehicle braking system, comprising: an internally toothed ring gear; an externally toothed pinion arranged eccentrically in the ring gear and configured to mesh with the ring gear in a circumferential section, the pinion and the ring gear forming a crescent-shaped cavity opposite the circumferential section in which the pinion meshes with the ring gear; and a filler piece arranged in the cavity, the filler piece having an inner side on which heads of teeth of the pinion bear against and an outer side on which heads of teeth of the ring gear bear against, wherein the filler piece comprises a leg spring having legs disposed in the circumferential direction, the legs being configured to urge the filler piece inwards and outwards against the heads of the teeth of the pinion and the heads of the teeth of the ring gear, wherein the filler piece comprises an inner part having an inner side that bears against the heads of the teeth of the pinion, and an outer part having an outer side that bears against heads of the teeth of the ring gear, wherein the leg spring is arranged between the inner part and the outer part of the filler piece and is configured to press the inner part and the outer part apart, and wherein the filler piece has a sealing element which is arranged between the inner part and the outer part and which is configured to one or more of bear sealingly against the inner part and/or the outer part and seal axially.