Combined fuel and lubrication system for a gas turbine engine

Claim 1

A GAS TURBINE UNIT PROVIDED WITH A REDUCTION GEAR BETWEEN A TURBINE SHAFT AND A LOAD SHAFT, COMPRISING GAS TURBINE MEANS INCLUDING A TURBINE SHAFT PROVIDED WITH BEARING MEANS, COMPRESSOR OPERATIVELY CONNECTED TO SAID GAS TURBINE MEANS OUTPUT MEANS, CHANGE-SPEED GEAR MEANS OPERATIVELY CONNECTING SAID TURBINE SHAFT WITH SAID OUTPUT MEANS, SAID CHANGE SPEED GEAR, MEANS BEING PROVIDED WITH A GEAR HOUSING IN COMMUNICATION WITH THE SUCTION SIDE OF SAID COMPRESSOR MEANS, FUEL SUPPLY MEANS FOR SUPPLYING FUEL TO SAID GAS TURBINE MEANS WHILE SIMULTANEOUSLY COOLING AND LUBRICATING SAID TURBINE SHAFT, SAID BEARING MEANS AND SAID CHANGE-SPACED GEAR MEANS, SAID FUEL SUPPLY MEANS INCLUDING NOZZLE MEANS DISTRIBUTING A SPRAY OF FUEL TO PROVIDE SAID COOLING AND LUBRICATING FUNCTIONS, A FUEL TANK FORMING A COMMON HOUSING WITH SAID CHANGESPEED GEAR HOUSING SUMP MEANS WITHIN SAID COMMON HOUSING FOR COLLECTING THE FUEL DRAINING OUT OF THE COOLING AND LUBRICATING PLACES, SAID SUMP MEANS BEING OPERATIVELY CONNECTED WITH SAID FUEL TANK BY OVERFLOW MEANS CONNECTING SAID SUMP MEANS WITH SAID FUEL TANK IN SUCH A MANNER THAT THE FUEL FLOWS FROM SAID SUMP MEANS INTO SAID FUEL TANK BY GRAVITATIONAL FORCES, AND SAID FUEL SUPPLY MEANS INCLUDING MEANS TAKING THE FUEL COLLECTING IN SAID SUMP MEANS FOR SUPPLYING THE SAME TO SAID GAS TURBINE MEANS.