Electric motor with improved cooling means

Claim 1

AN ELECTRIC MOTOR ADAPTED FOR USE IN A CLOSED REFRIGERATION SYSTEM, A HERMETICALLY SEALED ENCLOSURE, A STATOR AND A ROTOR, THE STATOR HAVING A CORE COMPOSED OF A STACK OF LAMINATIONS ARRANGED IN SPACED GROUPS AND AXIALLY PROJECTING STATOR WINDINGS, THE SPACES THEREBETWEEN PROVIDING RADIAL PASSAGES LEADING FROM THE CLEARANCE BETWEEN THE STATOR AND ROTOR TO THE PERIPHERY OF THE STATOR CORE, THE ROTOR AT ONE END THEREOF INCLUDING AN AXIALLY EXTENDING CYLINDRICAL BAFFLE, SAID MEANS COMPRISING: MEANS DEFINING A RECEIVING CHAMBER SURROUNDING THE STATOR CORE AND INTO WHICH SAID RADIAL PASSAGES OPEN; MEANS DEFINING A HEADER CONCENTRIC WITH THE ROTOR AND LOCATED ADJACENT TO SAID ONE END THEREOF; NOZZLE MEANS CONNECTED WITH SAID HEADER AND POSITIONED TO DEBOUCH LIQUID REFRIGERANT UNDER PRESSURE INTO THE SPACE BETWEEN SAID STATOR WINDING AND SAID CYLINDRICAL BAFFLE AND INTO THE CLEARANCE BETWEEN THE STATOR AND ROTOR; INLET DUCT MEANS LEADING FROM OUTSIDE THE ENCLOSURE TO SAID HEADER TO DELIVER FLUID REFRIGERANT THERETO FOR DISCHARGE FROM THE NOZZLE MEANS AND HEAT ABSTRACTING FLOW PAST SAID STATOR WINDINGS AND CYLINDRICAL BAFFLE AND SAID STATOR AND ROTOR THROUGH SAID RADIAL PASSAGES; AND OUTLET DUCT MEANS CONNECTED WITH THE RECEIVING CHAMBER TO CARRY OFF THE REFRIGERANT ALONG WITH THE HEAT ABSTRACTED THEREBY.