Hydraulic machine

A hydraulic machine, which can be used at will as a pump or as a torque transducer, comprising:

• (a) an outer rotor rotatably mounted on a machine frame around a first rotational axis and connectable, through an input shaft, to a driving motor;
• (b) an inner rotor mounted at the interior of the outer rotor, said inner rotor being rotatable around a second rotational axis which is perpendicular to said first axis of the outer rotor, and which is connected through a gear drive to an auxiliary shaft coaxial to said input shaft and to said first rotational axis of the outer rotor;
• (c) means for securing said auxiliary shaft to the machine frame or to a transmission, utilizer or control device;
• (d) a hydraulic circuit arranged at the interior of the inner rotor, presenting at least one active circuit, the projection of which on a plane passing through said second rotational axis of the inner rotor defines a final surface different from zero;
• (e) rotary connection means for sealingly connecting the ends of the active circuit with a fixed inflow and a fixed outflow connection;
• whereby to the inner rotor there is associated a field of accelerations of Coriolis which depends on the angular speeds of the outer rotor and of the inner rotor, said field generating, between the ends of the active circuit and more precisely between the inflow and the outflow connections, a pressure difference in the field contained in the hydraulic circuit, which pressure difference is substantially sinusoidally varying.