Patent ID: 6964237

Claim:
A grate block for an incinerator, the incinerator including a plurality of rows of fixed grate blocks and a plurality of rows of movable grate blocks, the rows of fixed and movable grate blocks being arranged in a stepped configuration creating upper and lower rows relative to each other, the grate block comprising: an upper wall having a top surface; a front wall having a front surface extending from the top surface; a pair of side walls each having an outer surface for engaging adjacent grate blocks and an inner surface, the side walls parallel to each other and spaced from each other, each outer side surface extending from the top surface and the front surface; at least one of the side walls having a recess adjacent the top surface of the upper wall and also adjacent to the front surface of the front wall, the recess constructed and arranged to direct a stream of air upward, in a direction away from an adjacent, lower row of grate blocks; and at least one of the side walls having an opening between the inner surface and the outer surface for passage of a stream of air.