Rotary machine

Claim 1

A COMPRESSOR OF THE ROTARY HELICAL SCREW TYPE COMPRISING TWO STAGES EACH OF WHICH INCLUDES HOUSING STRUCTURE PROVIDING TWO PARALLEL INTERSECTING BORES WITH THE CORRESPONDING BORES OF THE TWO SECTIONS IN COAXIAL ALIGNMENT, MALE AND FEMALE ROTORS HAVING DIFFERENT STAGE PORTIONS EACH PROVIDING HELICAL LANDS AND GROOVES MOUNTED TO ROTATE IN INTERMESHING RELATION IN THE BORES OF EACH OF SAID STAGES AND COOPERATING WITH EACH OTHER AND SAID HOUSING STRUCTURE TO FORM WORKING CHAMBERS VARYING IN VOLUME AS THE ROTORS REVOLVE, ONE OF SAID ROTORS CONSTITUTING A DRIVING ROTOR TO WHICH POWER IS SUPPLIED FROM AN EXTERNAL SOURCE AND THE OTHER OF SAID ROTORS CONSTITUTING A DRIVEN ROTOR, SAID HOUSING INCLUDING AN INTERMEDIATE WALL PORTION FOR SEPARATING SAID STAGES AND PROVIDING INTERMEDIATE BEARING SUPPORT FOR EACH OF SAID ROTORS, THE DRIVING ROTOR COMPRISING ROTOR STAGES ANGULARLY RIGID RELATIVE TO EACH OTHER AND THE DRIVEN ROTOR COMPRISING ROTOR STAGES ANGULARLY MOVABLE RELATIVE TO EACH OTHER AT ALL TIMES IN ASSEMBLED AND OPERATIVE RELATION, WHEREBY TO PERMIT THE DIFFERENT SECTIONS OF THE DRIVEN ROTOR TO INDIVIDUALLY ADJUST THEMSELVES ANGULARLY TO PROPER INTERMESHING RELATION WITH THE RESPECTIVELY COACTING SECTIONS OF THE DRIVING ROTOR AND TO THEREBY AVOID DEVELOPING UNACCEPTABLY HIGH PRESSURES BETWEEN THE INTERMESHING SURFACES OF THE SEVERAL SECTIONS.