Patent ID: 8123434

Claim:
A mat of three different types of interlocked revetment blocks, comprising: a first type of revetment block having a body with a thickness defined by a distance between a top surface and a bottom surface of the body of said first type block, said first type block further including: a plurality of side edges; at least two arms, each arm extending from a respective side edge of the body of said first type block; each said arm having an enlarged end connected to a respective side edge by a narrowed neck portion; at least one said arm being a partial thickness arm having a thickness less than the thickness of the body of said first type block; at least two sockets formed inwardly from respective side edges of the body of said first type block; each said socket having an enlarged cavity connected by a narrowed inlet to the respective side edge of the body of said first type block, each said socket adapted for receiving therein an arm of a similarly constructed neighbor block; at least one said socket being a partial depth socket having a thickness less than the thickness of the body of said first type block; further including a second type block, said first type and second type block each having a first thickness, said first type block and said second type block having different configurations of arms and sockets; a third type block having a thickness greater than the thickness of said first and second type blocks; said first, second and third type blocks each having at least one of an arm or socket for interlocking with a respective socket or arm of a neighbor block of the mat; and a mat comprising a plurality of said first type blocks, a plurality of said second type blocks and a plurality of said third type blocks interlocked to form said mat.