Rotary compressors, pumps and the like

Claim 1

A ROTARY APPARATUS COMPRISING A CYLINDER FIXEDLY SUPPORTED AND HAVING AN OPEN END, A DRIVE SHAFT DISPOSED CO-AXIALLY OF SAID CYLINDER AND EXTENDING INTO SAID OPEN END THEREOF, SUPPORTING MEANS FOR SAID SHAFT PERMITTING IT TO ROTATE WITH AN ATTENDANT ENDWISE MOTION, MEANS FOR DRIVING SAID SHAFT AND PERMITTING IT TO HAVE AN ATTENDANT ENDWISE MOTION, A FLUID IMPINGING PISTON OPERABLY DISPOSED IN SAID CYLINDER AND RIGID WITH SAID SHAFT, SAID PISTON PROVIDED WITH V-SHAPED RECESSES EXTENDING INWARDLY FROM AN END THEREOF AND PROVIDED WITH ALTERNATE V-SHAPED CAM HEADS, SAID RECESSES HAVING HELICAL CAMMING FACES, A STATOR FIXED IN SAID CYLINDER AND HAVING CAM HEADS AND INTERVENING SUBSTANTIALLY V-SHAPED RECESSES WITH HELICAL COMPLEMENTARY CAMMING FACES CONVERGING TO AN APEX AND CONFORMING DIMENSIONALLY WITH SAID RECESSES IN SAID PISTON FOR CAMMING ENGAGEMENT THEREWITH IN THE ROTATION OF SAID PISTON, WHEREBY TO PRODUCE DISPLACEMENT CHAMBERS, FLUID PASSAGES FOR SAID CHAMBERS, VALVE MEANS FOR SAID FLUID PASSAGES, AND MEANS FOR EFFECTING INTERENGAGEMENT OF THE CAMMING FACES OF SAID PISTON WITH THOSE OF THE SAID STATOR.