DRAINAGE DEVICE Russian patent published in 1994 - IPC

Abstract RU 2016166 C1

FIELD: hydraulic engineering. SUBSTANCE: drainage device includes a water collecting pipe having water- receiving perforations and filtering cells disposed in the perforations on the outer surface of the pipe. The filtering cells are disposed in the upper part of the collecting pipe and provided with second tier filtering cells disposed in reciprocally perpendicular planes and having variable length. EFFECT: enlarged operating capabilities. 2 cl, 2 dwg

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RU 2 016 166 C1

Authors

Kruglov G.G.

Surma N.V.

Dates

1994-07-15—Published

1990-06-11—Filed