Rotary air compressor

Claim 1

A ROTARY COMPRESSOR COMPRISING A CASING HAVING A BORE AND AN INLET AND DISCHARGE IN COMMUNICATION WITH THE BORE, A PAIR OF HEADS CONNECTED TO THE CASING FOR CLOSING THE BORE TO FORM A COMPRESSOR CHAMBER, A ROTOR ECCENTRICALLY DISPOSED IN THE CHAMBER AND MOVABLE ENDWISE BETWEEN THE HEADS, SAID ROTOR HAVING A CENTRAL BORE AND CYLINDRICAL ENDS AT THE ENDS OF THE BORE THAT PROJECT INTO THE HEADS AND PROVIDE A FLOW PATH THROUGH THE ROTOR, BEARINGS IN THE HEADS FOR ROTATIVELY SUPPORTING THE ROTOR ENDS AND FOR PERMITTING AXIAL MOVEMENT, A DRIVE SHAFT INDEPENDENTLY SUPPORTED IN ONE OF HEADS AND HAVING A CONNECTION TO THE ROTOR THAT TRANSMITS ROTARY MOVEMENT AND ISOLATES AXIAL MOVEMENT, A DRIVEN SHAFT INDEPENDENTLY SUPPORTED IN THE OTHER HEAD AND HAVING A CONNECTION TO THE ROTOR THAT TRANSMITS ROTARY MOVEMENT AND ISOLATES AXIAL MOVEMENT, BEARINGS IN THE HEADS FOR INDEPENDENTLY SUPPORTING THE DRIVING AND DRIVEN SHAFTS, THE HEADS HAVING PASSAGES IN COMMUNICATION WITH THE FLOW PATH THROUGH THE ROTOR AND PROVIDING A FLOW PATH FOR LUBRICATING AND COOLING OIL TO THE SHAFT CONNECTIONS AND TO THE BEARINGS, SAID CASING HAVING AT LEAST ONE CROSS-OVER PASSAGE IN COMMUNICATION WITH THE PASSAGES IN THE HEADS TO PROVIDE A FLOW PATH FOR OIL FROM ONE OF THE HEADS TO THE OTHER AND A PUMP HOUSED IN THE HEAD SUPPORTING THE DRIVEN SHAFT AND DRIVEN BY SUCH SHAFT TO SUPPLY THE LUBRICATING AND COOLING OIL.