SEA SHORE-PROTECTIVE CONSTRUCTION Russian patent published in 1996 - IPC

FIELD: hydraulic building. SUBSTANCE: construction includes blocks with through lengthwise wave suppressing passages that become narrower as they come from front block face towards rear block face. Though slots are placed on the rear block face. Plane of the slots is in the form of isosceles trapezium. The slots are used to engage keys in them. Cross section of the keys is in the form of two isosceles trapezia interconnected with their smaller bases. The plane of the blocks is in the form of trapezium when the construction is assembled. In so doing vertical through slots are originated in corners of the blocks formed with side and rear faces. Plane of the slots is in the from of half of isosceles trapezium. EFFECT: shore protection. 10 dwg