Opening/closing device

E - Fixed Constructions – 03 – F

Patent

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Details

E03F 9/00 (2006.01) E02B 7/40 (2006.01) E02B 8/02 (2006.01) E03F 7/02 (2006.01)

Patent

CA 2751405

An opening/closing device 1 according to the present invention includes a gate 10 that receives a flow of a sewage W in an upright state, and can fall toward a downstream side of the flow and a first spring 52a that generates a force for bringing the gate 10 into an upright state, wherein the first spring 52 generates a force insufficient for bringing the gate 10 into the upright state if the gate 10 is in a fallen state, and generates a force sufficient for bringing the gate into the upright state if the gate 10 is tilted by an angle equal to or less than a predetermined angle.

La présente invention concerne un dispositif d'ouverture-fermeture (1) présentant une porte (10) qui peut intercepter le flux d'eaux usées (W) lorsqu'elle se trouve dans une position verticale, et retomber dans le sens aval du flux, ainsi qu'un premier ressort (52a) qui produit une force destinée à mettre la porte (10) en mouvement depuis sa position verticale. Lorsque la porte (10) se trouve dans sa position retombée, le premier ressort (52a) produit une force qui n'est pas suffisante pour mettre la porte (10) en position verticale, et lorsque la porte (10) se trouve dans une positon inclinée dans laquelle elle est inclinée d'un angle inférieur ou égal à un angle prédéterminé, le premier ressort (52a) produit une force qui est suffisante pour mettre en mouvement la porte vers sa position verticale.

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