Pneumatic motor

Claim 1

A FLUID PRESSURE MOTOR, COMPRISING: (A) A HOLLOW CYLINDRICAL HOUSING HAVING INTERNALLY THREADED END PORTIONS; (B) A CYLINDRICAL STATOR WITHIN SAID HOUSING, SAID STATOR HAVING A LONGITUDINALLY EXTENDING BORE THERETHROUGH PROVIDING A ROTOR CYLINDER HAVING AN AXIS OFFSET FROM THE AXIS OF SAID HOUSING; (C) A ROTATABLE SHAFT EXTENDING THROUGH THE BORE OF SAID STATOR, SAID SHAFT BEING COAXIAL WITH THE AXIS OF SAID HOUSING AND HAVING END PORTIONS EXTENDING LONGITUDINALLY OUTWARDLY OF THE RESPECTIVE ENDS OF SAID STATOR; (D) A CYLINDRICAL ROTOR HAVING AN AXIAL BORE THERETHROUGH IN WHICH IS SECURED SAID SHAFT, SAID ROTOR DEFINING WITH THE ROTOR CYLINDER A CRESCENT SHAPED PRESSURE CHAMBER, SAID ROTOR HAVING A PLURALITY OF ANNULARLY SPACED LONGITUDINALLY EXTENDING RADIAL SLOTS THEREIN; (E) A ROTOR BLADE RADIALLY SLIDABLE IN EACH ROTOR SLOT, THE OUTER EDGES OF SAID BLADES BEING ENGAGEABLE WITH THE INNER CYLINDRICAL SURFACE OF HE STATOR BORE, SAID BLADES HAVING INNER END CORNER PORTIONS EXTENDING RADIALLY AND LONGITUDINALLY INWARDLY; (F) A BALL BEARING ASSEMBLY FOR EACH END OF SAID SHAFT, SAID BALL BEARING ASSEMBLIES INCLUDING INNER AND OUTER RACES WITH THE END PORTIONS OF THE SHAFT OPERABLY DISPOSED IN THE INNER RACES; (G) A FORWARD END PLATE BETWEEN THE OUTLET END OF THE STATOR AND THE ADJACENT BALL BEARING ASSEMBLY, SAID PLATE BEING MOUNTED ON THE SHAFT AND HAVING A FLARING OPENING AT THE OUTER SIDE TO PROVIDE CLEARANCE FOR THE INNER RACE OF SAID BALL BEARING ASSEMBLY, SAID PLATE HAVING AN ELONGATED SLOT COMPRISING AN OUTLET PASSAGE MEANS FOR EXHAUST AIR FROM THE LARGER PORTION OF THE CHAMBER IN THE STATOR, THE OUTER RACE OF THE ADJACENT FORWARD BEARING ASSEMBLY HAVING A PASSAGE THERETHROUGH WITH WHICH SAID INLET PASSAGE MEANS COMMUNICATES; (H) AN END MEMBER SCREWED INTO THE ADJACENT INTERIORALLY THREADED FORWARD END PORTION OF THE HOUSING; (I) AN OUTPUT SHAFT ROTATABLY MOUNTED IN SAID END MEMBER; (J) GEARING IN A GEAR CHAMBER IN THE HOUSING, INTERCONNECTING THE ROTOR SHAFT AND THE OUTPUT SHAFT; (K) A SECOND PLATE, BETWEEN THE BEARING ASSEMBLY AND THE GEARING AND HAVING EXHAUST AIR PASSAGE MEANS THERETHROUGH WITH WHICH THE PASSAGE IN THE OUTER RACE OF SAID FORWARD BEARING ASSEMBLY COMMUNICATES SAID HOUSING HAVING A PLURALITY OF AIR EXHAUST PORTS ANNULARLY SPACED IN A SUBSTANTIALLY COMMON PLANE OUTWARDLY OF THE GEARING AND CONNECTED TO THE SPACE IN WHICH THE GEARING IS DISPOSED; (L) A REAR END PLATE ABUTTING AGAINST THE REAR END OF THE STATOR AND SAID REAR END PLATE HAVING A PAIR OF OPPOSITELY ARRANGED ARCUATE GROOVES IN THE SIDE FACING THE STATOR, OPENINGS THERETHROUGH COMMUNICATING WITH RESPECTIVE ARCUATE GROOVES, AND AN AIR PORT THERETHROUGH; (M) A VENT PLATE ON SAID SHAFT BETWEEN SAID REAR END PLATE AND THE REAR BEARING, SAID VENT PLATE HAVING A SHAFT RECEIVING OPENING THERETHROUGH, A RELIEVED PORTION FOR THE INNER BEARING RACE, AND A PAIR OF VERTICAL GROOVES IN THE SIDE THEREOF FACING THE REAR PLATE, INNER ENDS OF SAID VERTICAL GROOVES COMMUNICATING WITH THE RESPECTIVE ARCUATE GROOVES IN SAID REAR END PLATE THROUGH BLEED OPENINGS IN SAID REAR END PLATES, SAID VENT PLATE HAVING OTHER OPENINGS THERETHROUGH AT THE OUTER ENDS OF SAID VERTICAL GROOVES; (N) AND AN OUTER END PLATE AT THE OUTER SIDE OF THE LAST MENTIONED BEARING ASSEMBLY AND HAVING A RECESS THEREIN TO PROVIDE CLEARANCE FOR THE INNER RACE OF SAID BEARING ASSEMBLY, SAID OUTER END PLATE HAVING AIR PORTS THERETHROUGH; (O) A HEAD THREADED INTO THE INTERNALLY THREADED REAR END OF THE HOUSING, SAID HEAD HAVING AN AIR INLET PASSAGE THEREIN AND AN AIR OUTLET PORT; (P) PIN RECEIVING HOLES IN THE VARIOUS PLATES, BEARINGS, AND IN THE INNER SIDE OF THE HEAD; (Q) A PIN BORE IN THICKEST PORTION OF THE STATOR WALL, SAID PIN BORE EXTENDING LONGITUDINALLY OF THE STATOR AND HAVING END PORTIONS EXTENDING INTO SAID PIN RECEIVING HOLES, WHEREBY THE VARIOUS PARTS OF THE MECHANISM ARE RETAINED IN OPERATIVE ALIGNMENT, THE OPENINGS AND RECESSES IN SAID PLATES PROVIDING PARTS OF INLET PASSAGEWAY MEANS FOR PRIMARY PRESSURE AIR TO INTER THE ROTOR CYLINDER FOR ACTUATING SAID ROTOR, AND SECONDARY AIR INTO THE ROTOR GROOVES BEHIND THE BLADES THEREIN, AND EXHAUST PASSAGEWAY MEANS FOR THE PRIMARY AIR TO EXHAUST TO SAID GEAR CHAMBER FROM WHICH SAID AIR IS EXHAUSTED THROUGH EXHAUST PORTS PROVIDED THEREFOR IN THE FORWARD END OF SAID HOUSING, AND EXHAUST PASSAGEWAY MEANS FROM SAID ROTOR GROOVES TO THE AIR EXHAUST PORT IN SAID HEAD, THE AIR PORT IN SAID REAR END PLATE COMPRISING A RESTRICTION FOR CAUSING A DIFFERENTIAL OF PRESSURE BETWEEN THE PRESSURE BEHIND SAID BLADES AND THE ROTOR CYLINDER WHEREBY SAID BLADES ARE FORCED RADIALLY OUTWARDLY INTO SEALING ENGAGEMENT WITH THE WALL OF THE ROTOR CYLINDER.