Patent ID: 7731485

Claim:
Hydraulic device comprising a housing, a rotor rotatable about a first axis (l), said rotor having a first side and a second side, a plurality of pistons on said first side and said second side of the rotor and coupled to the rotor, a plurality of rotor chambers on said first side and said second side of the rotor, each being formed by a cylindrical wall and a piston whereby the cylindrical walls are rotatable about secondary axes (m 1 , m 2 ), and the first axis intersecting each secondary axis on either side of the rotor under a first angle (β) causing the volume of the chambers to change between a minimum and a maximum value during rotation of the rotor, characterized in that during rotation of the rotor the volume of each of the rotor chambers reaches a minimum value at a different rotative position of the rotor than all of the other chambers.