Patent ID: 7815588
Filing Date: 2010-10-19
Classification: A61M

Abstract:
1. A device for switching the direction of fluid flow, comprising: an intersection between a first, second, third, and fourth port; an occlusion mechanism having a first and second radius of curvature for operatively adapting the intersection such that in a first position, the first and second ports are fluidically connected by the intersection and the third and fourth ports are fluidically connected by the intersection and in a second position, the first and fourth ports are fluidically connected by the intersection and the second and third ports are fluidically connected by the intersection; wherein the occlusion mechanism comprises a separating member external to fluid flow and does not directly contact a fluid having a first and second end with a middle portion having at least one curved surface there between, and wherein the thicknesses of the first and second ends are larger than the thickness of the middle portion.