公开(公告)号：WO2023091065A1

公开(公告)日：2023-05-25

申请号：PCT/SE2022/051061

申请日：2022-11-12

Applicant: QLEVERWELL AB

Inventor： MARCSTRÖM, Andreas ,  LUNDIN, Andréas ,  BRODIN, Per ,  LUNDQVIST, Mats

IPC: E03C1/28 ,  E03F1/00 ,  E03F3/04 ,  E03F5/02 ,  E03F5/04 ,  E03F5/042 ,  E03C1/288 ,  E03C1/292 ,  F16K15/14

Abstract: A closure device and a system for reversible closure of a drain is disclosed, the closure device comprising a collapsible, flexible material chute (6), a throttling mechanism (9) comprising a shutter (15) and an actuator (14) controlling the shutter between a flow position wherein the shutter is inactivated while permitting passage through the open chute, and a non-flow position wherein the shutter is activated and operative for contraction of the chute into a collapsed state.