Patent ID: 8419673

Claim:
A glaucoma drainage device comprising: a main drainage tube with a first end configured to be located in an anterior chamber of an eye and a second end configured to be located in a drainage location; a bypass drainage tube fluidly coupled to and in parallel with the main drainage tube, the bypass drainage tube having a first end and a second end; a pump in communication with the bypass drainage tube, the pump comprising a first driver and a first flexible membrane enclosing a first chamber; a first check valve located upstream of the pump in the bypass drainage tube; a second check valve located downstream of the pump in the bypass drainage tube; an active valve located in the main drainage tube upstream of the first end of the bypass drainage tube, the active valve comprising a second driver and a second flexible membrane enclosing a second chamber; and a third check valve located in the main drainage tube between the first end of the bypass drainage tube and the second end of the bypass drainage tube; wherein a volume of the first chamber is changed to pump fluid from the anterior chamber to the drainage location; and further wherein the first, second, and third check valves are arranged to allow fluid flow only from the anterior chamber to the drainage location.