Structure for rotating seals

Claim 1

A FLUID SEAL ARRANGEMENT FOR PREVENTING RADIAL AND TANGENTIAL FLUID FLOW BETWEEN AT LEAST ONE OF TWO END PLATES AND A HIGH SPEED ROTOR POSITIONED THEREBETWEEN AND AXIALLY SPACED THEREFROM, SAID ROTOR AND SAID END PLATES EACH HAVING COOPERATING PORTS, SAID FLUID SEAL COMPRISING AN ABRADABLE SURFACE AND AN ABRADING SURFACE, THE ROTATIVE ENGAGEMENT OF SAID ABRADING AND ABRADABLE SURFACES CAUSING PARTICLES TO BE RELEASED FROM SAID ABRADABLE SURFACE; THE EXTENT OF SAID PARTICLE RELEASE DEFINED BY THE EXTENT OF SAID ROTATIVE ENGAGEMENT; THE RELEASE OF SAID PARTICLES ESTABLISHING A NON-CONTACT RELATIONSHIP BETWEEN SAID ABRADING AND ABRADABLE SURFACES, SAID ABRADING SURFACE INCLUDING PASSAGES ARRANGED TO PERMIT PARTICLES RUBBED FROM SAID ABRADABLE SURFACE TO BE CARRIED AWAY FROM SAID ENGAGED ABRADING AND ABRADABLE SURFACES, SAID ABRADABLE SURFACE BEING A METALLIC OXIDE COATING.