Patent ID: 7390181

Claim:
A rotary piston machine, comprising: at least two operational rotors mounted for rotation, said operational rotors including a driving part and a driven part, said driving part and said driven part each including front face denticulation collectively forming a boundary of working spaces, respective axes of said driving part and said driven part being disposed at an axial angle relative to one another, said driven part being biased in a direction of the driving part; a machine housing accommodating said at least two operational rotors; a pressure conduit and a suction conduit intermittently connectable with said working spaces when said operational rotors are running; a motor housing and an electric motor housed in said motor housing, said electric motor including a drive rotor mounted in axial alignment with said driving part, said motor housing and said machine housing being interconnected; and a journal pin rotatably supporting said driven part and being disposed approximately at said axial angle with respect to said driving part.