Distributer phase shifter for a hydraulic pump motor

A system comprising:

• a hydraulic pump motor including
• a pump motor housing, and
• a pump motor central rotor that houses at least one hydraulic cylinder in which a hydraulic piston is configured to move in translation, the central rotor cooperating with an input-output distributor which presents the central rotor with an input-output angular collector of a first conduit and an input-output angular collector of a second conduit such that when the central rotor rotates relative to the pump motor housing, the hydraulic cylinder is alternately placed in relation, via an input-output internal canal of the central rotor and an input-output orifice of the central rotor, with an input-output first conduit by the input-output angular collector of the first conduit and with an input-output second conduit by the input-output angular collector of the second conduit;
• and
• a distributor phase shifter including
• at least one phase shift acting element which is configured to be directly or indirectly supported on the pump motor housing to rotate the input-output distributor around its longitudinal axis and over a determined angular range while acting directly or indirectly on an entrainment in rotation system having at least one part integral with the input-output distributor.