Patent ID: 8079298

Claim:
A hydraulic mechanism comprising a cylinder block that is suitable for rotating about an axis of rotation in a stationary casing and that has a plurality of cylinders in which pistons are disposed that are suitable for co-operating with a cam that is secured to or integral with the casing, the cylinders extending radially relative to the axis of rotation and being connected by cylinder ducts to communication orifices disposed in a communication face of the cylinder block that is perpendicular to the axis of rotation, a distribution cover that forms a portion of the casing, and an internal fluid distributor that is non-rotary relative to said cover, the cover having feed and discharge ducts that pass through a zone corresponding to an axial projection of the cylinders and that extend between an outside face and an inside face of said cover, the internal distributor having distribution ducts that extend between a connection face that co-operates with said inside face for the purpose of selectively connecting the distribution ducts to the feed and discharge ducts, and a distribution face that is perpendicular to the axis of rotation and that is disposed against the communication face in such a manner as to cause distribution orifices of said distribution ducts to communicate with the communication orifices while the cylinder block is rotating, a transverse face of the cylinder block being provided with an axial setback in which at least a portion of the distributor is disposed, the communication face being provided in a plane surface of said setback.