Reversible pressure fluid driven motor

Claim 1

IN REVIERSIBLE PRESSURE FLUID DRIVEN PORTABLE DENTAL DRILLS, ROTARY GRINDERS AND DRILLS, AND LIKE TOOLS, THE COMBINATION WHICH COMPRISES A MOTOR HOUSING, A PRESSURE FLUID DRIVEN VANED TURBINE ROTOR MOUNTED FOR ROTATION IN SAID HOUSING, PRESSURE FLUID ADMISSION CHAMBER IN SAID HOUSING AT ONE END OF SAID ROTOR AND HAVING FIRST FLUID ADMISSION PASSAGES FOR DIRECTING FLUID FLOW TOWARD ONE SIDE OF SAID VANES FOR FORWARD ROTATION OF SAID ROTOR AND SECOND FLUID ADMISSION PASSAGES FOR DIRECTING FLUID FLOW TOWARD THE OPPOSITE SIDE OF SAID VANES FOR REVERSE ROTATION OF SAID ROTOR, FLUID OUTLET PASSAGES FOR CONDUCTING SEPARATE FROM SAID FLUID ADMISSION PASSAGES FOR CONDUCTING FLUID AWAY FROM SAID ROTOR AND DISPOSED AT THE END THEREOF OPPOSITE SAID FLUID ADMISSION CHAMBER, MEANS FOR SELECTIVELY OPENING AND CLOSING EACH OF SAID FIRST AND SECOND ADMISSION PASSAGES IMMEDIATELY ADJACENT SAID ROTOR, AND MEANS OUTSIDE SAID HOUSING AND AT THE END OF SAID ROTOR OPPOSITE TO SAID ADMISSION CHAMBER FOR MANIPULATING SAID SELECTIVE OPENING AND CLOSING MEANS.