Sheath valve

Details Sheath valve Sheath valve

F - Mech Eng,Light,Heat,Weapons

16

K

F16K 15/14 (2006.01) B05B 11/00 (2006.01)

Patent

CA 2179811

A linear sheath valve (11) having a valve platform (33) and a conforming cover (21). The valve platform (33) can have inlet (39) and outlet (45) channels to carry liquid into and out of the valve. An elastomeric membrane (29) is held under tension between the cover (21) and the platform (33) so as to control the flow of liquid between channels. The cover (21) includes an expansion area on the cover surface (22) adjacent to the membrane (29) and between the inlet (39) and the outlet (45). Liquid can flow through the valve only when it is under sufficient pressure to press the membrane (29) into the expansion area, creating a flow path from the inlet (39) between the membrane (29) and the valve platform (33) to the outlet (45). Discontinuance of the pressure on the liquid allows the membrane (29) to seal the inlet (39) and outlet (45), thus preventing any flow between them.

Soupape linéaire à gaine (11) comportant une plate-forme (33) et un couvercle (21) lui étant adapté. La plate-forme (33) de soupape peut comporter un canal d'entrée (39) et un canal de sortie (45) amenant un liquide dans la soupape et hors de celle-ci. Une membrane d'élastomère (29) est maintenue sous tension entre le couvercle (21) et la plate-forme (33) de manière à commander le débit entre les canaux. Le couvercle (21) comporte à sa surface (22) une zone d'expansion contiguë à la membrane (29) et située entre l'entrée (39) et la sortie (45). Le liquide ne peut traverser la soupape que s'il est sous une pression suffisante pour repousser la membrane (29) dans la zone d'expansion, ce qui crée entre la membrane (29) et la plate-forme (33) de la soupape un passage reliant l'entrée (39) à la sortie (45). La disparition de la pression du liquide amène la membrane (29) à fermer l'entrée (39) et la sortie (45) et à empêcher tout écoulement entre elles.

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