Two-way vent valve

F - Mech Eng,Light,Heat,Weapons – 16 – K

Patent

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Details

IPC codes

F16K 17/19 (2006.01) B65D 51/16 (2006.01)

Type

Patent

Patent number

CA 2220746

Description

A liquid tank cap (10) incorporates a two-way relief valve in which an annular valve disc (16) has one side (56) sealed against a seal (18) adjacent to its inner diameter and the other side (60) sealed against a seal (14) adjacent to its outside diameter. When subjected to a pressure differential in either direction, the disc (16) deflects so as to increase its concavity and allow air passage by one or the other seal (14, 18), depending upon whether the pressure in the tank is subatmospheric or superatmospheric.

Un couvercle (10) de réservoir à liquide incorpore une soupape de surpression à deux voies qui comporte un disque de soupape (16) dont une face (56) est en contact étanche avec un joint d'étanchéité (18) adjacent à son diamètre interne et dont l'autre face (60) est en contact étanche avec un joint d'étanchéité (14) adjacent à son diamètre externe. Lorsqu'il est soumis à un différentiel de pression dans quelque direction que ce soit, le disque (16) se cintre de telle sorte que sa concavité augmente et de telle sorte que l'air peut passer par l'un ou l'autre des deux joints (14, 18), suivant que la pression à l'intérieur du réservoir est inférieure ou supérieure à la pression atmosphérique.

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