Patent ID: 7654982
Filing Date: 2010-02-02
Classification: A61M,G01F

Abstract:
1. A fluid delivery apparatus for maintaining a desired flow rate of a fluid from a fluid source along a fluid path, comprising: an inflatable bladder bearing against the fluid source to drive the fluid from the fluid source along the fluid path, the flow rate being responsive to varying pressure in said inflatable bladder; an adjustable flow resistor for varying flow resistance in the fluid path, the flow rate being responsive to adjustment of said flow resistor; an inline flow sensor capable of operating over a wide flow rate range for detecting an actual flow rate of the fluid; a processor coupled to said adjustable flow resistor and said flow sensor for comparing the actual flow rate of the fluid with the desired flow rate of the fluid to determine a difference between the actual flow rate and the desired flow rate; means for adjusting the flow resistor; and means for varying the pressure in said inflatable bladder.