Patent ID: 7934519

Claim:
A microfluid system comprising: first and second fluid reservoirs, a flow chamber, a fluid channel array which is arranged such that the first fluid reservoir is in fluidic communication with the second fluid reservoir via the flow chamber, a conveying means for conveying a fluid from said first fluid reservoir via the flow chamber into said second fluid reservoir, and a valve unit, wherein the valve unit can be brought from a first state to a second state so that, in said first state, a fluid can be conveyed by the conveying means from said first fluid reservoir through the flow chamber in a predetermined direction of flow into the second fluid reservoir, and so that, in said second state, a fluid can be conveyed by the conveying means from said second fluid reservoir through the flow chamber in the predetermined direction of flow into the first fluid reservoir, wherein the valve unit comprises four stop valves and four terminals for establishing a fluidic connection among the first fluid reservoir, the second fluid reservoir, an inlet opening of the flow chamber in the direction of flow, and a discharge opening of the flow chamber in the direction of flow, wherein the valve unit is implemented such that a fluidic connection can be established between each fluid reservoir and the inlet opening as well as the discharge opening, wherein along each of these connections one of the stop valves is arranged, wherein the conveying means comprises a pressurizing means to apply a positive or negative pressure to the first fluid reservoir, the first fluid reservoir being arranged along a fluidic path between the pressuring means and the valve unit.