FILTERING GUARD Russian patent published in 2014 - IPC E04H17/20 

FIELD: construction.

SUBSTANCE: device comprises struts mounted with gap inter se along the perimeter, made in the form of cylindrical surfaces and grid also mounted along the perimeter. The grid is made of conductive material, grounded and installed with gap relative to the struts, which are designed as cylindrical capacitors, the inner surface of which is grounded, and the outer surface is connected with the electrical power source.

EFFECT: provision of protection of space to be guarded against penetration in it of aerosol contamination air contained in the outer surrounding space.

5 cl, 2 dwg