BLOCK Russian patent published in 1998 - IPC

FIELD: hydraulic engineering structures. SUBSTANCE: this relates to erection of structures for protection of sea shores from destructive action of waves. Block has body with opening into which stem is inserted made in the form of truncated cones connected together by their large bases. Opening in block body is made in the form of cone-shaped recesses in front and rear faces of block body which are located on common axis and conjugated by their small bases. Stem has central through-hole and is installed in front face of block body. Depth of opening in block body is larger than length of stem. EFFECT: high efficiency. 2 cl, 12 dwg