Improvements in or relating to liquid flow control devices

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

Patent

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Details

F16K 21/04 (2006.01) F16K 7/00 (2006.01) F16K 13/00 (2006.01) F16K 31/00 (2006.01)

Patent

CA 2581383

The disclosure relates to a liquid flow control device (10) having a port or passageway (11) through which liquid flow is to be controlled. A body (12) of a liquid swellable material is located in the port or passageway having an upstream side and a downstream side in relation to the direction of liquid flow through the port or passageway. A layer of sealing material (17) is provided on the upstream side of the body to prevent contact of that side of the body with the liquid when the body is swollen to close the port or passageway whilst allowing contact of the downstream side of the body when the body is in the non-swollen condition allowing liquid flow through the port or passageway.

Cette divulgation se rapporte à un dispositif de régulation du débit de liquide (10) pourvu d'un orifice de passage ou d'une voie de passage (11) à travers lesquels un débit de liquide doit être régulé. Un corps (12) de substance gonflable dans un liquide est situé dans l'orifice de passage ou la voie de passage présentant un côté amont et un côté aval en rapport avec la direction du débit de liquide à travers l'orifice de passage ou la voie de passage. Une couche de matériau d'étanchéité (17) occupe le côté amont du corps pour empêcher un contact de ce côté du corps avec le liquide, lorsque le corps est gonflé, pour fermer l'orifice de passage ou la voie de passage. En même temps, ce processus assure le contact du côté aval du corps, lorsque ce corps est à l'état non gonflé, ce qui permet le débit du liquide à travers l'orifice de passage ou la voie de passage. .

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