Patent ID: 6805841
Filing Date: 2004-10-19
Classification: A61M,F04B,G01F,Y10T

Abstract:
A liquid outlet link assembly to provide a steady liquid delivery output rate below 10 &mgr;l/minute through a liquid outlet means from a positive displacement pump having an immediate step pumping rate which is relatively substantially larger than the delivery rate through the liquid outlet means comprising:a body having a hollow interior; a liquid inlet in the body of the link assembly for connection to the pump; a liquid outlet in the body for connection to the liquid outlet means, said outlet means comprising a microchannel whereby a resistance to flow to the liquid outlet means is substantially greater than through the hollow interior of the body; and pressure compressible means which contracts to reduce the pressure surge of a liquid within the body when the liquid is delivered by the pump at an increased pressure through the liquid inlet, and then gradually expands to decrease the pressure drop of the liquid within the body as it is delivered through the liquid outlet, so as to maintain a substantially steady liquid pressure at the liquid outlet.