Checker brick
AssigneeNorth American Refractories Co.
InventorJack Hyde
Life of this patent
Estimating the term…
Abstract
A checker brick has a plurality of walls intersecting at a plurality of spaced intersections. Four walls extend outwardly from each intersection in equidistantly-spaced relationship to one another. One of the four walls at each intersection is a common wall that extends between adjacent intersections. The other three walls at each intersection are independent walls. Mating projections and recesses are provided on the opposite surfaces of the brick at the intersections for interlocking bricks stacked in tiers.
Claims25
A checker brick including walls intersecting at a plurality of spaced intersections having intersection centerlines, a common wall extending between each adjacent pair of said intersections, four walls (including said common walls) extending outwardly from each said intersection and being equidistantly-spaced therearound, said four walls at each intersection that are not common walls being independent walls, said brick having top and bottom surfaces, and each said intersection having a projection on one of said surfaces and a mating recess on the opposite one of said surfaces, whereby a plurality of bricks are stackable in interlocked relationship with said projections and recesses on adjacent bricks interdigitated.
A checkerwork formed by a plurality of tiers of stacked and interlocked bricks, each brick having plural walls intersecting at a plurality of spaced intersections, each brick having opposite plane surfaces between which said walls are located, projections on one of said surfaces at said intersections and mating recesses on the other of said surfaces at said intersections, said bricks being stacked with all of the bricks in one tier having their projections and recesses interdigitated with recesses and projections on bricks in adjacent tiers, and each brick in each tier being in engagement with at least two bricks in adjacent tiers.
Dependencies are inferred from the claim text.