DEVICE FOR REMOVAL OF ICE FROM WELL DRAINS OF ROOFS OF BUILDINGS AND CONSTRUCTIONS Russian patent published in 2009 - IPC E04D13/76 

FIELD: construction.

SUBSTANCE: device for ice removal from well drains of roofs includes tubular well drain with fixed therein flexible elements, thereat flexible elements are made as plates of a material, temperature coefficient of line extension whereof is 1.5 times as high as the temperature coefficient of the lineal extension of the well drain material. Flexible elements are set vertically adjacent to each other in the well drain evenly along the section by means of spot welding along the entire length of its vertical part. Length of the flexible elements is accepted equal to the internal diametre D of the well drain, and width b equal to 0.2D. Being installed in the well drain plates are unbent forming a gap m between the plate and the well drain of not less than 0.1D.

EFFECT: design simplification and prevention of power consumption.

3 cl, 2 dwg