FLOW RESTRICTOR DEVICE FOR A MEDICAL APPARATUS

摘要

A medical apparatus flow restrictor includes a housing having an inlet and an outlet, and a fluid flow path defined through the housing between the inlet and outlet. At least one pair of opposed restriction surfaces are provided in contact with each other within the housing between the inlet and the outlet. The restriction surfaces are disposed in the flow path such that fluid delivered to the inlet passes between the opposed restriction surfaces prior to flowing from the outlet. At least one of the restriction surfaces comprises a pattern of fluid passages formed into the surface, the passages having a size and shape and cooperating with the opposed restriction surface such that a desired flow rate of fluid is achieved through the restrictor.