Refrigerator compressor

Claim 1

REFRIGERATING APPARATUS COMPRISING A SEALED CASING HAVING AN INLET FOR GASEOUS REFRIGERANT TO BE COMPRESSED, SAID CASING HAVING A CRANKCASE OPENLY COMMUNICATING THEREWITH FOR CONTAINING A QUANTITY OF LUBRICATING OIL, A REFRIGERANT COMPRESSOR ARRANGED IN SAID CASING AND HAVING A CYLINDER, A ROTARY PISTON IN SAID CYLINDER, A CRANKSHAFT FOR PLANETATING SAID PISTON, BLADE MEANS IN SAID CYLINDER ENGAGING SAID PISTON TO DIVIDE SAID CYLINDER INTO INTAKE AND DISCHARGE PORTIONS, UPPER AND LOWER WALL MEMBERS IN COVERING RELATION TO SAID CYLINDER FOR SEALING THE SAME, SAID LOWER WALL MEMBER BEING SUBSTANTIALLY SUBMERGED IN LUBRICATING OIL AND HAVING A PLURALITY OF CAVITIES RESPECTIVELY FORMING MUTUALLY INDEPENDENT LOW-PRESSURE AND HIGH-PRESSURE GAS SOUND MUFFLING MECHANISMS IN ITS LOWER PORTION, SAID LOW-PRESSURE SOUND MUFFLING MECHANISM HAVING AN AREA SUBSTANTIALLY GREATER THAN SAID HIGH-PRESSURE MECHANISM AND BEING IN HEAT TRANSFER RELATION WITH A LARGE PROPORTION OF THE CYLINDER AREA TRAVERSED BY SAID PISTON, SAID HIGH-PRESSURE GAS SOUND MUFFLING MECHANISM INCLUDING FIRST AND SECOND COMPARTMENTS EACH COMMUNICATING WITH SAID CYLINDER REARWARDLY OF SAID BLADE MEANS WHEREBY SAID BLADE MEANS IS URGED AGAINST SAID PISTON BY THE PRESSURE OF SAID REFRIGERANT, PASSAGE MEANS INCLUDING SAID UPPER WALL MEANS AND SAID FIRST-NAMED SOUND MUFFLING MECHANISM FOR CONDUCTING GASEOUS REFRIGERANT FROM SAID CASING TO SAID CYLINDER FOR COMPRESSION THEREIN, PASSAGE MEANS INCLUDING A VALVE MECHANISM FOR DISCHARGING COMPRESSED REFRIGERANT FROM SAID CYLINDER TO THE FIRST COMPARTMENT OF SAID SECOND-NAMED MUFFLING MECHANISM, PASSAGE MEANS FOR CONDUCTING SAID COMPRESSED REFRIGERANT TO SAID CYLINDER REARWARDLY OF SAID BLADE MEANS, PASSAGE MEANS INCLUDING A VALVE MECHANISM FOR CONDUCTING SAID COMPRESSED REFRIGERANT THEREFROM TO THE SECOND COMPARTMENT OF SAID SECOND-NAMED MUFFLING SYSTEM, PASSAGE MEANS FOR CONDUCTING SAID REFRIGERANT FROM SAID SECOND COMPARTMENT TO THE EXTERIOR OF SAID CASING, AND MOTOR MEANS CONNECTED TO SAID CRANKSHAFT FOR OPERATING SAID ROTARY PISTON.