Patent ID: 6814547
Filing Date: 2004-11-09
Classification: A61M,F04B,H05B,Y10S,Y10T

Abstract:
A pump for a dialysis system connected to at least one vacuum source, the pump comprising:a first chamber wall including a first aperture; a second chamber wall including a second aperture; a piston, at least a portion of which can move through the second aperture, the piston including a third aperture; first and second membranes disposed between the first and second chamber walls, wherein a vacuum can be applied from the at least one vacuum source through the first aperture to pull the first membrane towards the first chamber wall and can be applied from the at least one vacuum source through the third aperture to pull the second membrane towards the piston, wherein the piston can thereafter move the second membrane; and a dialysis fluid opening enabling dialysis fluid to be pulled in between the first and second membranes upon movement of the piston.