Circumferential turn-down seal for flexible sector plate

Claim 1

ROTARY REGENERATIVE HEAT EXCHANGE APPARATUS HAVING A ROTOR INCLUDING A CYLINDRICAL ROTOR SHELL JOINED TO A ROTOR POST BY RADIAL PARTITIONS TO FORM A SERIES OF SECTORIAL COMPARTMENTS THAT CARRY A MASS OF REGENERATIVE HEAT EXCHANGE MATERIAL, A HOUSING SURROUNDING THE ROTOR PROVIDED AT OPPOSITE ENDS OF THE ROTOR WITH END PLATES HAVING IMPERFORATE PORTIONS LOCATED BETWEEN CIRCUMFERENTIALLY SPACED APERTURES THAT DIRECT A HEATING FLUID AND A FLUID TO BE HEATED TO AND THROUGH THE REGENERATIVE HEAT EXCHANGE MATERIAL CARRIED BY THE ROTOR, SEALING MEANS BETWEEN END OF THE ROTOR AND THE ROTOR HOUSING ADAPTED TO RESTRICT FLUID FLOW TO THE SPACED APERTURES OF THE ROTOR COMPRISING A RESILIENT SECTOR PLATE SUBSTANTIALLY COEXTENSIVE WITH THE IMPERFORATE PORTION OF EACH END PLATE EXTENDING AXIALLY THEREFROM INTO SEALING RELATION WITH THE ADJACENT END OF THE ROTOR, AN ANNULAR WEARING MEMBER CARRIED BY THE ROTOR HOUSING LYING RADIALLY BETWEEN THE RESILIENT SECTOR PLATE AND THE ROTOR HOUSING, AND A RIGID ANNULAR SEALING FLANGE EXTENDING RADIALLY OUTWARD FROM THE EDGE OF THE ROTOR INTO SEALING RELATIONSHIP WITH SAID WEARING MEMBER WHEREBY MOVEMENT OF SAID ROTOR WILL CAUSE THE SEALING FLANGE TO ABRADE THE ADJACENT SURFACE OF THE WEARING MEMBER TO PROVIDE A SEALING SURFACE THEREBETWEEN.