Rotary piston, positive displacement compressor

Claim 1

A ROTARY PISTON, POSITIVE DISPLACEMENT, ELASTIC FLUID COMPRESSOR COMPRISING A CASING STRUCTURE PROVIDING A BARREL PORTION HAVING INTERSECTING BORES WITH CO-PLANAR AXES AND FURTHER PROVIDING SPACED APART PORTS COMMUNICATING WITH SAID BORES AND COMPRISING A HIGH PRESSURE PORT AT LEAST THE MAJOR PORTION OF WHICH IS LOCATED TO ONE SIDE OF THE PLANE OF SAID AXES AND A LOW PRESSURE PORT AT LEAST A MAJOR PORTION OF WHICH IS LOCATED ON THE OPPOSITE SIDE OF SAID PLANE, ROTORS PROVIDED WITH HELICAL LANDS AND GROOVES HAVING AN EFFECTIVE WRAP ANGLE OF LESS THAN 360* ROTATABLY MOUNTED IN SAID BORES AND COMPRISING A MALE ROTOR HAVING LANDS AND INTERVENING GROOVES THE MAJOR PORTIONS OF WHICH LIE OUTSIDE THE PITCH CIRCLE OF THE MALE ROTOR AND A FEMALE ROTOR HAVING LANDS AND INTERVENING GROOVES THE MAJOR PORTIONS OF WHICH LIE INSIDE THE PITCH CIRCLE OF THE FEMALE ROTOR, THE LANDS AND GROOVES OF SAID ROTORS INTERMESHING TO FORM WITH THE CONFRONTING PORTION OF THE CASING STRUCTURE CHEVRON-SHAPED WORKING CHAMBERS EACH COMPOSED OF COMMUNICATING PORTIONS OF A MALE ROTOR GROOVE AND A FEMALE ROTOR GROOVE JOINING AT THE APEX END OF THE CHAMBER AND SAID APEX END MOVING AXIALLY TOWARDS SAID HIGH PRESSURE PORT AS THE ROTORS REVOLVE TO DECREASE THE VOLUME OF THE CHAMBER AND EFFECT COMPRESSION OF THE FLUID CONTENTS THEREOF, THE LANDS OF SAID MALE ROTOR HAVING CONVEXLY CURVED PROFILES THE OUTER PORTIONS OF WHICH LIE PERIPHERALLY WITHIN THE LINES OF A LAND HAVING A ROOT OF THE SAME PERIPHERAL WIDTH AND FLANKS GENERATED BY POINTS ON THE PITCH CIRCLE OF SAID FEMALE ROTOR AND THE PROFILE OF THE GROOVES OF SAID FEMALE ROTOR BEING THE ENVELOPES DEVELOPED BY THE CONVEX LANDS OF SAID MALE ROTOR IN PASSING INTO AND OUT OF MESH WITH SAID FEMALE ROTOR, WHEREBY A SERIES OF GAPS IS CREATED IN THE SEALING LINES OF NORMAL CLEARANCE BETWEEN THE COOPERATING PARTS DEFINING THE PERIMETERS OF SAID COMPRESSION CHAMBERS, SAID GAPS EXTENDING AXIALLY OF THE LINE OF INTERSECTION BETWEEN SAID BORES ON THE HIGH PRESSURE SIDE OF THE BORES AND SAID GAPS TRAVELING AXIALLY OF SAID LINE OF INTERSECTION TOWARD SAID HIGH PRESSURE PORT AS THE ROTORS REVOLVE, AND MEANS FOR SEALING THE CLEARANCE BETWEEN THE PARTS DEFINING THE PERIMETERS OF SAID CHAMBERS INCLUSIVE OF SAID GAPS AND FOR COOLING THE FLUID BEING COMPRESSED THEREIN COMPRISING A PLURALITY OF OPENINGS IN THE BARREL PORTION OF SAID CASING STRUCTURE FOR INJECTING LIQUID INTO SAID CHAMBERS, SAID OPENINGS BEING DISTRIBUTED LENGTHWISE OF SAID BARREL PORTION OF THE CASING STRUCTURE IN THE AREA THEREOF ADJACENT TO AND INCLUSIVE OF SAID LINE OF INTERSECTION.