PRESSURE REGULATOR FOR INFUSOR

摘要

An ambulatory infusion (11) device for dispensing a fluid at a predetermined fluid flow rate includes an elastic bladder (15) having an interior volume for storing the fluid under pressure and an opening for dispensing the fluid. A pressure regulator (23) is in fluid communication with the opening of the bladder and includes an inlet for receiving fluid from the bladder at an inlet pressure and an outlet for discharching the fluid at a predetermine outlet pressure. A valve (167) at the inlet has a hemispheric-shaped head (169) adapted to cooperate with a frustoconic-shaped seat (173) to promote uniform fluid flow therebetween. A movable diaphragm (129) is connected to the valve, and a valve plate (91) opposite a surface of the diaphragm has channels (135) or texture therein. The diaphragm and the valve are movable in response to the fluid pressure acting on the diaphragm surface.