ROOF Russian patent published in 2013 - IPC E04D13/76 

FIELD: construction.

SUBSTANCE: first plank is fixed to a roof ridge, hingedly and with a spring connected to the second plank, to which the third and fourth planks are attached as connected to the spring, with electromagnets and hoses connected to a compressor fixed on them. A rectifier is connected by the first wire via the first resistors and in parallel via normally open contacts of relays with electromagnets. The rectifier is also connected by the second wire via the second resistors and in parallel via normally open contacts of the second relays with electromagnets. Electric current flows via resistors from the rectifier along the first wire to electromagnets. The second plank deviates from the first plank. Along the second wire via resistors from the rectifier current arrives to electromagnets. Electromagnets repulse from each other. The third and fourth planks open, slowly blowing the roof with air along the slope and quickly blowing it across the roof. Hoses sweep snow from all parts of the roof.

EFFECT: increased operational reliability of a roof.

5 dwg