Lubricating system for a gas turbine engine

Claim 1

A GAS TURBINE ENGINE COMPRISING A LOW PRESSURE SPOOL HOUSING HAVING AN INTERNAL OPENING POSITIONED THEREIN, A LOW PRESSURE SPOOL INCLUDING A COMPRESSOR, A TURBINE AND AN INTERCONNECTING SHAFT, SAID COMPRESSOR BEING ADAPTED TO INITIALLY COMPRESS AIR TAKEN INTO THE GAS TURBINE ENGINE, A PLURLITY OF BEARINGS ROTATABLY SUPPORTING SAID LOW PRESSURE SPOOL WITHIN SAID LOW PRESSURE SPOOL HOUSING, A POWER TURBINE, A PLURALITY OF BEARINGS, SAID BEARINGS ROTATABLY SUPPORTING SAID POWER TURBINE IN SAID GAS TURBINE ENGINE, SAID POWER TURBINE BEING ADAPTED TO POWER AN EXTERNAL LOAD, A HIGH PRESSURE SPOOL HOUSING, AN ACCESSORY GEAR BOX HOUSING AFFIXED TO SAID HIGH PRESSURE SPOOL HOUSING, A HIGH PRESSURE SPOOL, A PLURALITY OF BEARINGS ROTATABLY SUPPORTING SAID HIGH PRESSURE SPOOL IN SAID HIGH PRESSURE SPOOL HOUSING AND SAID ACCESSORY GEAR BOX HOUSING, SAID ACCESSORY GEAR BOX HOUSING HAVING AN OPENING POSITIONED THEREIN COMMUNICATING WITH THE INTERNAL OPENING IN SAID LOW PRESSURE SPOOL HOUSING, A MAIN SUMP COMMUNICATING WITH THE OPENING IN SAID LOW PRESSURE SPOOL HOUSING, A FIRST AUXILIARY SUMP POSITIONED TO COLLECT OIL FROM THE BEARINGS SUPPORTING SAID POWER TURBINE, A SECOND AUXILIARY SUMP POSITIONED TO COLLECT OIL FROM ONE OF THE BEARINGS SUPPORTING SAID LOW PRESSURE SPOOL, THE OIL FROM THE REMAINDER OF THE BEARINGS SUPPORTING SAID LOW PRESSURE SPOOL BEING COLLECTED BY SAID MAIN SUMP, A FIRST PUMP SUPPORTED BY SAID ACCESSORY GEAR BOX HOUSING AND HAVING AN INLET CONNECTED TO SAID MAIN SUMP AND AN OUTLET CONNECTED TO SUPPLY ALL OF SAID BEARINGS WITH OIL UNDER PRESSURE, A SECOND PUMP SUPPORTED BY SAID ACCESSORY GEAR BOX HOUSING AND HAVING AN INLET CONNECTED TO SAID FIRST AUXILIARY SUMP, A THIRD PUMP SUPPORTED BY SAID ACCESSORY GEAR BOX HOUSING AND HAVING AN INLET CONNECTED TO SAID SECOND AUXILIARY SUMP, SAID SECOND AND THIRD PUMPS HAVING OUTLETS DISCHARGING INTO SAID ACCESSORY GEAR BOX WHEREBY THE OIL DISCHARGE THEREFROM MAY FLOW THROUGH THE OPENING THEREIN, THROUGH THE INTERNAL OPENING IN SAID LOW PRESSURE SPOOL HOUSING AND INTO SAID MAIN SUMP.