Patent ID: 8960010
Filing Date: 2015-02-24
Classification: A61M,G01L

Abstract:
1. A system for controlling the position of a diaphragm in a diaphragm-containing pressure pod, the system comprising; a fluid pump: a pressure pod comprising an interior defining a flow-through fluid side and a gas side, the flow-through fluid side and the gas side being separated from one another by a diaphragm; a fluid conduit in fluid communication with the flow-through fluid side and operatively positioned with respect to the fluid pump such that the pump can move fluid through the conduit and force fluid through the flow-through fluid side of the pressure pod; a pressure sensor operatively connected to the gas side of the pressure pod and configured for sensing pressure resulting from movement of the diaphragm; a gas source in fluid communication with the gas side of the pressure pod and comprising a valve configured to provide fluid communication between the gas side and the gas source, the valve also being configured to interrupt communication between the gas side and the gas source; and a controller configured to receive a pressure signal generated by the pressure sensor and to control the valve in response to the signal received, wherein the control of the valve controls pressure in the gas side of the pressure pod, which in-turn controls the position of the diaphragm.