Gerotor machine with flow control recesses in the inner gear member

A gerotor machine, comprising a housing;

• a displacement unit in said housing and including an inner gear member having an axis of rotation, and an outer gear member having a further axis circularly movable about said axis of rotation of said inner gear member without rotating of said outer gear member about said further axis, said inner gear member having a plurality of teeth with teeth root sections and intermediate sections located between said teeth root sections, said gear members bounding a plurality of displacement chambers therebetween;
• and means for controlling a flow of pressure medium and including a plurality of radial groove-shaped recesses formed in said inner gear member at one axial side of the latter and each arranged in a respective one of said intermediate sections without extending into said teeth root sections, each of said radial groove-shaped recesses being bounded by two circumferentially spaced control edges, said flow controlling means further including a plurality of control openings formed in said housing and arranged relative to the axis of said inner gear member at a radial distance corresponding to that of said recesses, said control edges of said recesses cooperating with said control openings and being operative for controlling the communication of the latter with said displacement chambers.