BRICK Russian patent published in 2010 - IPC E04C1/00 

FIELD: construction.

SUBSTANCE: brick contains through cavities between opposite bed surfaces, and at least one cavity is arranged with area of cross section that varies along cavity length. Above-mentioned cavity along its length includes at least two sections, and on every of sections area of cross section of cavity along section length reduces down to value of minimum area of cross section of cavity on this section, and then increases up to value of maximum area of cross section of cavity at this section.

EFFECT: improved heat exchange of brick with environment in process of its drying, firing and cooling.

7 cl, 1 tbl, 1 ex, 21 dwg