Patent ID: 7431050
Filing Date: 2008-10-07
Classification: B01L,F16K,G01N,H01M,Y02E,Y10T

Abstract:
1. A fluid delivery device comprising: a flow channel formed on a substrate; and valves for controlling a flow of a fluid in the flow channel, wherein the flow channel comprises a first flow channel, a second flow channel branched from the first flow channel, a third flow channel connected to the first flow channel, and a fourth flow channel in communicating with the second flow channel by way of the first flow channel, and a first valve formed in the second flow channel being a check valve that allows invariably a flow toward the first flow channel and intercepts a flow in a reverse direction, or a threshold valve that allows invariably a flow toward the first flow channel, and in the reverse direction operates in accordance with a pressure difference between an upstream side and a downstream side of the first valve caused by the flow of the fluid, allowing the fluid to flow when the pressure difference is lower than a prescribed value P a second valve formed in the fourth flow channel being a threshold valve, and the first valve and the second valve each having a layer and controlling the flow of the fluid in the second and fourth flow channels by elastically deforming the layer on the substrate, and wherein the fluid introduced from the second flow channel toward the fourth flow channel and located in the first flow channel and also between the first valve and the second valve is delivered toward the third flow channel.