DRAINAGE SYSTEM Russian patent published in 1994 - IPC

Abstract RU 2017888 C1

FIELD: drainage and irrigation. SUBSTANCE: drainage system consists of separate members connected to each other made of automobile tires cut into sectors. Each sector is laid into ditch with its tread adjoining ditch side walls. Drainage system is made triangular or square in cross-section. Tiers are cut transversely so that dihedral angle formed by intersection of tier cut planes features 120 and 90 deg. for triangular and square cross-sections, respectively. EFFECT: higher efficiency. 4 dwg

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RU 2 017 888 C1

Authors

Volkov V.V.

Boltovskij V.A.

Tavlinova T.I.

Volkova V.V.

Dates

1994-08-15—Published

1991-06-04—Filed