Hydrostatic rotating machine with radial pistons and with improved distribution

A hydrostatic rotating machine comprising:

• an external element comprising a circumferential internal cam path;
• and
• an internal element comprising a cylinder block, the internal and external elements being coaxial and mounted to revolve with respect to one another about an axis of rotation, one of the internal and external elements being a rotor and the other of the internal and external elements being a stator, the cylinder block including radial cylinders with pistons that are radially mobile and distributed circumferentially, and the cylinder block being disposed at a center of the cam path and the pistons being configured to cooperate with the cam path in the rotation of the rotor with respect to the stator;
• and
• a hydraulic distributor configured to selectively couple the cylinders to a hydraulic circuit via a synchronization junction forming a revolving coupling between the rotor and the stator, the hydraulic distributor comprising:
• an insertion section extending axially between a section of lesser diameter and a section of greater diameter, this insertion section having a first synchronization surface extending between the outline of the section of lesser diameter and the outline of the section of greater diameter;
• and
• fluid distribution ducts which each comprise a first end segment opening transversely at the first synchronization surface, and obliquely with respect to the axis of rotation,
• wherein the cylinder block further comprises:
• a reception section complementing the insertion section of the hydraulic distributor, the reception section having a second synchronization surface complementing the first synchronization surface of the hydraulic distributor, said synchronization junction being formed via association of the first synchronization surface and of the second synchronization surface;
• and
• fluid diffusion ducts, each of which comprises a second end segment opening (i) transversely at the second synchronization surface and (ii) obliquely with respect to the axis of rotation.