Patent ID: 6929239
Filing Date: 2005-08-16
Classification: B01L,F16K

Abstract:
1. A microfluidic card device for conducting a reaction, comprising: a microfluidic card body comprising an inside circulation network isolated from outside, said circulation network comprising at least a duct and chamber into which said duct opens; a microfluidic valve arrangement associated to said duct, to be operated by at least one external activation force independent from said card device to control passage of microfluid, said valve arrangement comprising: a microfluidic valve seat defined around the opening of said duct in said chamber, a flexible membrane closing at least said chamber; a stop means, distinct from the flexible membrane, located in said chamber, cooperating with said valve seat under the deformation of said membrane, between an open position wherein said stop means lie away from said valve seat, and a closed position wherein said stop means engages said valve seat, and an actuating means, arranged on said body but located out of said chamber, comprising a pressing member, cooperating with said membrane and said stop means, directly or indirectly movable by said external activation force between a non-pressing position wherein said stop means are in the open position, and a pressing position wherein said stop means are in the closed position, by deformation caused by said pressing member to said membrane.