Motor-compressor for small refrigerating machines

Claim 1

IN A REFRIGERATION COMPRESSOR, IN COMBINATION, A UNITARY BODY CASTING HAVING A CENTRAL ANNULAR PORTION DEFINING A COMPRESSOR CHAMBER, AN ELONGATED TUBULAR BEARING PORTION DISPOSED COAXIALLY WITH SAID ANNULAR PORTION EXTENDING AXIALLY THEREIN SPACED RADIALLY INWARDLY THEREFROM DEFINING JOINTLY THEREWITH A CRANK CASE, RADIAL RIBS FIXED TO SAID ANNULAR HOLDING SAID NEARING PORTION IN FIXED POSITION, ANNULAR PARTITION MEANS DEFINING A CYLINDER DISPOSED RADIALLY OUTWARDLY OF SAID COMPRESSOR CHAMBER HAVING ONE END IN COMMUNICATION WITH SAID CHAMBER AND AN OPPOSITE END OPEN, RADIALLY EXTENDING PARTITIONS DISPOSED ANGULARLY SPACED ON SAID ANNULAR PORTION, AN OUTER WALL DEFINING IN CONJUNCTION WITH SAID ANGULARLY SPACED PARTITIONS ANGULARLY SPACED MUFFER CHAMBERS DISPOSED CIRCUMFERENTIALLY OF SAID COMPRESSOR CHAMBER AND AT LEAST SOME OF WHICH ARE IN COMMUNICATION WITH EACH OTHER, A ROTARY DRIVEN CRANKSHAFT IN SAID CHAMBER, A PISTON RECIPROCABLY DRIVEN IN SAID CYLINDER FROM SAID CRANKSHAFT, A MOTOR ROTOR CONNECTED TO SAID CRANKSHAFT AND ROTATABLY SUPPORTED IN SAID BEARING PORTION, A STATOR CIRCUMFERENTIALLY OF SAID ROTOR HAVING WINDINGS EXTENDING AXIALLY, AN OTHER WALL HAVING AN ANNULAR PORTION DEFINING A COLLAR EXTENDING ANXIALLY IN A DIRECTION AWAY FROM SAID MUFFER CHAMBERS RADIALLY SPACED OUTWARDLY FROM SAID COMPRESSOR CHAMBER FOR RECEIVING