Angularly adjustable slides for screw rotor machines

Claim 1

A POSITIVE DISPLACEMENT, ROTARY PISTON ENGINE OF THE HELICAL SCREW ROTOR TYPE COMPRISING CASING STRUCTURE PROVIDING A BARREL PORTION HAVING INTERSECTING BORES WITH COPLANAR AXES, MALE AND FEMALE ROTORS HAVING HELICAL LANDS AND INTERVENTING GROOVES ROTATABLY MOUNTED IN SAID BORES, THE LANDS OF THE MALE ROTOR HAVING CONVEXLY CURVED FLANKS THE MAJOR PORTIONS OF WHICH LIE OUTSIDE THE PITCH CIRCLE OF THE MALE ROTOR AND THE GROOVES OF THE FEMALE ROTOR HAVING CONCAVELY CURVED SIDES 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 CASING STRUCTURE CHEVRON SHAPED WORKING CHAMBERS EACH COMPOSED OF COMMUNICATING PORTIONS OF A MALE ROTOR GROOVE AND A COOPERATING FEMALE GROOVE, THE BASE ENDS OF SAID CHAMBERS BEING DETERMINING BY AN AXIALLY FIXED TRANSVERSE PLANE AND THE APEX ENDS THEREOF BEING DETERMINED BY THE POINTS OF INTERMESH BETWEEN COOPERATING LANDS AND GROOVES OF THE ROTORS AND MOVING AXIALLY RELATIVE TO SAID FIXED TRANSVERSE PLANE AS THE ROTORS REVOLVE TO THEREBY VARY THE VOLUME OF SAID CHAMBERS, SAID CASING STRUCTURE PROVIDING A HIGH PRESSURE PASSAGE TERMINATING IN A MAIN HIGH PRESSURE PORT COMMUNICATING WITH SAID BORES, A MAJOR PORTION OF SAID PORT BEING LOCATED ON ONE SIDE OF THE PLANE OF SAID AXES AT THE PLACE OF SAID TRANSVERSE PLANE AND A LOW PRESURE PASSAGE TERMINATING IN A MAIN LOW PRESSURE PORT COMMUNICATING WITH SAID BORES, A MAJOR PORTION OF SAID LOW PRESSURE PORT BEING LOCATED ON THE SIDE OF THE PLANE OF SAID AXES OPPOSITE THAT OF SAID HIGH PRESSURE PORT, SAID CASING STRUCTURE FURTHER PROVIDING A CIRCULAR VALVE CHAMBER IN DIRECT COMMUNICATION WITH ONE OF SAID PASSAGES AND A PLURALITY OF AUXILIARY PASSAGES PROVIDING COMMUNICATION BETWEEN SAID VALVE CHAMBER AND SAID WORKING CHAMBERS, SAID AUXILIARY PASSAGES TERMINATING AT ONE END IN A PLURALITY OF AXIALLY SEPARATED AUXILIARY PORTS LOCATED IN AT LEAST ONE OF SAID BORES AND AT THEIR OPPOSITE ENDS TERMIMATING IN A PLURALITY OF AXIALLY SEPARATED VALVE PORTS IN SAID VALVE CHAMBER, ROTARY REGULATING VALVE MEANS LOCATED IN SAID VALVE CHAMBER COMPRISING AN OBTURATING PORTION PROVIDING A CLOSURE EXTENDING ACROSS SAID VALVE CHAMBER AND A CIRCULAR SKIRT PORTION EXTENDING AXIALLY FROM SAID OBTURATOR PORTION AND HAVING AN OBLIQUE CONTROL EDGE, LOCATED TO COACT WITH SAID VALVE PORTS, AND MEANS FOR TURNING SAID VALVE MEANS TO DIFFERENT ANGULAR POSITIONS TO REGULATE THE FLOW OF WORKING FLUID THROUGH SAID VALVE PORTS.