WATER SEALING DEVICE Russian patent published in 2013 - IPC E03C1/29 E03C1/288 

FIELD: construction.

SUBSTANCE: device comprises a channel having an inlet hole connected to a drain discharge, and an outlet hole connected to a sewage pipe; a check valve in the form of a duckbill arranged between the inlet and outlet holes. Besides, the valve is made as capable of letting liquid through only in one direction from the inlet hole into the outlet one. The device also comprises a lock made as capable of formation of a hydraulic seal between the inlet hole and the outlet hole, at the same time in case of normal use at least a section of the valve is submerged into a hydraulic seal. Another version of device realisation differs from the previous one only by the fact that during normal use at least a section of the valve is arranged below the outlet hole. The lock comprises a channel having an inlet hole connected to the drain discharge, and an outlet one, connected to the sewage pipe, besides, the lock is made as capable of formation of a hydraulic seal between the inlet and outlet holes and holds a check valve in the form of a duckbill. During normal use at least a section of the valve is submerged into the hydraulic seal.

EFFECT: improved convenience of usage due to reduction of device height.

28 cl, 2 dwg