Axial flow separator

Claim 1

IN A GAS TURBINE ENGINE ASSEMBLY INCLUDING A COMPRESSOR, A COMBUSTOR, AND A TURBINE IN SERIAL FLOW ARRANGEMENT, A SEPARATOR FOR REMOVING EXTRANEOUS MATTER FROM THE STREAM OF AIR SUPPLIED TO THE COMPRESSOR, AND SEPARATOR COMPRISING: MEANS FORMING AN AXIALLY EXTENDING ANNULAR PASSAGEWAY HAVING AT OPPOSITE ENDS THEREOF AN ANNULAR INLET, AND AN ANNULAR OUTLET COMMUNICATING WITH THE COMPRESSOR, A ROW OF CIRCUMFERENTIALLY SPACED RADIALLY EXTENDING TURNING VANES ADJACENT SAID INLET FOR IMPARTING SWIRL TO THE AIR STREAM FLOWING THROUGH SAID PASSAGEWAY, THEREBY TO DIRECT EXTRANEOUS MATTER CARRIED BY SAID AIR STREAM TOWARD THE PERIPHERY OF SAID PASSAGEWAY, OUTER WALL MEANS DOWNSTREAM OF SAID SWIRL PRODUCING MEANS DEFINING COLLECTION MEANS FOR RECEIVING THE EXTRANEOUS MATTER, SAID COLLECTION MEANS COMPRISING A FIRST ANNULAR WALL MEMBER AND A SECOND ANNULAR WALL MEMBER COAXIALLY MOUNTED WITH RESPECT TO SAID FIRST WALL MEMBER, THE UPSTREAM END OF SAID SECOND WALL MEMBER BEING OF SUBSTANTIALLY SMALLER DIAMETER THAN THE AXIALLY CORRESPONDING PORTION OF SAID FIRST WALL MEMBER SUCH THAT AN ANNULAR COLLECTION CAVITY HAVING SUBSTANTIAL RADIAL EXTENT IS DEFINED BETWEEN SAID FIRST AND SECOND WALL MEMBERS, FLUID COMMUNICATION MEANS INTERCONNECTING SAID ANNULAR COLLECTION CAVITY AND SAID PASSAGEWAY FOR RETURNING TO SAID PASSAGEWAY AIR FLOWING INTO SAID CAVITY WITH THE EXTRANEOUS MATTER, AND FILTER MEANS IN SAID FLUID COMMUNICATION MEANS FOR PREVENTING THE RETURN OF EXTRACTED EXTRANEOUS MATTER TO SAID PASSAGEWAY THROUGH SAID FLUID COMMUNICATION MEANS.