FIELD: construction.
SUBSTANCE: device comprises flexible elements made of material with shape memory. Flexible elements are rigidly fixed on weight-bearing cable symmetrically relative to plane of its cross section. Length 1 of flexible elements is accepted as not more than 0.5 D, where D is inner diametre of drain, m.
EFFECT: simplification of design and reduced power consumption.
2 dwg
Authors
Dates
2010-09-27—Published
2009-01-26—Filed