Erosion control blocks
AssigneeTerrafix Erosion Control Products, Inc.
InventorRobert E. Crowe
Life of this patent
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Abstract
Interlocking concrete blocks for controlling erosion of banks of bodies of water are provided with improved wave resistance by providing pairs of spigots on one side of the block and a slot or slots on the other side of the block so as to allow longitudinal movement of courses in a bed formed from the blocks while also allowing relative angular movement of adjacent blocks.
Claims8
A concrete erosion control block having a pair of parallel opposed oblong rectangular outer surfaces, a pair of parallel opposed side surfaces extending lengthwise of said outer surfaces, a pair of longitudinally spaced frustoconical spigots formed on one of said parallel side surfaces and at least one longitudinally elongated slot in the opposite side surface, the spigots and the at least one slot being located to interengage respectively with slots and spigots of similar quincuncially related blocks when the blocks are layed in bond in adjacent parallel courses with their outer surfaces substantially in common planes, whereby to permit relative movement of said courses in a direction parallel to said side surfaces and relative angular movement between adjacent blocks in both the same and adjacent courses, whilst restraining movement of individual blocks out of said common planes.
Dependencies are inferred from the claim text.