HOLLOW TOY BUILDING BLOCK Russian patent published in 2016 - IPC E04C1/40 

FIELD: games.

SUBSTANCE: hollow toy building block containing an upper wall and at least three side walls, on the outer side of the upper wall there is at least one primary projection extending from the upper wall essentially perpendicular to the upper wall section, on which it is located, inside the cavity the toy building block has at least two inner contact sections, which are installed correspondingly to one primary projection or correspondingly to at least two of primary projections, and which are intended for contact with one or at least two primary projections of another toy building block, characterized by the fact, that it comprises at least one inner reinforcing extending element, at least one of inner contact sections is located on one of inner reinforcing extending elements, whole inner reinforcing extending element, on which the contact section is located is arranged within the distance measured from the lower surface of at least one side wall towards the upper wall and equal to height of the primary projection, or part of the above element extends from the lower surface of one side wall by the height equal to height of the primary projection.

EFFECT: higher hardening block walls.

702 cl, 34 dwg