Swash plate compressor for use in air conditioning system for vehicles

Claim 1

A SWASH PLATE TYPE COMPRESSOR FOR USE IN AN AIRCONDITIONING SYSTEM FOR VEHICLES AND THE LIKE, COMPRISING A PAIR OF CYLINDER BLOCKS CONNECTED IN SERIES, AN OUTER CYLINDRICAL CASING ENCLOSING SAID CYLINDER BLOCKS, CYLINDER HEADS DISPOSED WITHIN OPPOSITE ENDS OF SAID OUTER CASING, VALVE PLATES INTERPOSED BETWEEN SAID CYLINDER HEADS AND SAID CYLINDER BLOCKS, THE REMOTE END PORTIONS OF SAID PAIR OF CYLINDER BLOCKS EACH HAVING A CHAMBER THEREIN, THE ADJACENT PORTIONS OF SAID CYLINDER BLOCKS EACH HAVING A LONGITUDINAL SUCTION CHANNEL THEREIN, THE SUCTION CHANNELS BEING ALIGNED AND CONNECTING SAID CHAMBERS, SAID OUTER CASING HAVING AN INLET PORT THEREIN OPENING INTO SAID LONGITUDINAL SUCTION CHANNEL, AN OIL SUMP BENEATH THE CYLINDER BLOCKS, AND SAID CYLINDER BLOCKS EACH HAVING A CIRCUMFERENTIAL OIL RETURN CHANNEL THEREON AND EXTENDING BETWEEN THE CHAMBER IN THE CYLINDER BLOCK AND THE OIL SUMP FOR LEADING THE OIL SEPARATED FROM THE REFRIGERANT GAS DIRECTLY INTO SAID OIL SUMP.