Patent ID: 7318712

Claim:
A rotary piston machine including: first and second rotors being mutually disposed at an axial angle, said first rotor engaging said second rotor such that chambers are formed between said first and second rotors for conveying fluids or gases, said second rotor having a shank, said shank engaging a motor shaft; a housing including an inner surface; an inner housing including an outer surface spaced from said inner surface of said housing thereby forming a space therebetween, said inner housing further including a cylindrical borehole in which said rotors are accommodated, said borehole including a spherical recess having an opening through which said shank of said second rotor passes for engaging said motor shaft, said inner housing being shiftable, relative to the rotors, in axial and radial directions; first structural and biasing means for urging said inner housing against rotation within said housing; second structural means for preventing movement of the inner housing in the axial direction away from the rotors; and said inner housing including at least one pressure passage for transferring operating pressure in said space between the outer surface of the inner housing and the inner surface of the housing into the inner housing for producing contacting pressure between the inner housing and the rotors for minimizing gap flows.