Abstract: A movement device (1) comprising a stator chamber (2) inside which a rotor (3) can rotate about a respective axis (100), wherein the stator chamber (2) has an elongated shape that is extended along a longitudinal direction (101) and is connected, by means of a first intake or supply duct (4) and a second transfer or discharge duct (5), to a tank (6) for containing pressurized oxyhydrogen, the containment tank (6) having a first tank portion (6a) connected to the intake or supply duct (4) and a second tank portion (6b) connected to the transfer or discharge duct (5), a compensation valve (8) being interposed between the first tank portion (6a) and the second tank portion (6b), the rotor (3) comprising a three-lobed structure which forms three side walls (31, 32, 33) which cooperate with the stator chamber (2) in order to form, during its rotation about the axis (100), an intake chamber (41) at the outlet (4a) of the first intake or supply duct (4), a discharge chamber (42) at the outlet (5a) of the second tran