Patent ID: 7722574

Claim:
An infusion assembly for delivering therapeutic fluid to plural body sites, said assembly including: a positive displacement pump that periodically discharges pulses of therapeutic fluid; a flow regulator valve, said valve having; a valve housing that defines: a pressure chamber; an inlet bore that opens into said pressure chamber; and first and second outlet passageways that extend respectively from separate first and second outlet openings to a first catheter and a second catheter through which the fluid is directed to the body sites, said valve housing having a first planar sealing surface defined about said first and second outlet openings; a flexible diaphragm disposed in said pressure chamber over said inlet opening and said outlet openings that moves between a closed position and an open position, said diaphragm including a flexible portion and a head portion fixed to said flexible portion and configured to move with said flexible portion when said diaphragm moves between the closed and open positions, said head portion having a second planar sealing surface positioned to, when in the closed position, seat against said first planar sealing surface directly over both said first outlet opening and said second outlet opening so as to simultaneously seal both said first outlet opening and said second outlet opening; and a biasing member disposed against said diaphragm so as to normally hold said diaphragm in the closed position absent a fluid pulse from said inlet bore; a conduit for supplying discharged fluid from said pump through said valve housing inlet bore into said valve housing pressure chamber, said diaphragm moving from the closed position toward the open position under pressure of the discharged fluid supplied from said conduit.