Patent ID: 9421354
Filing Date: 2016-08-23
CPC Classification: A61M,F16K,Y10T

Claim Text:
1. A combination check valve and filter comprising: a housing formed of first and second unitary molded thermoplastic elements joined to provide a cavity therebetween and providing fluid communication between an opposed entrance port formed in the first unitary molded thermoplastic element and an exit port formed in the second unitary molded thermoplastic element, wherein the entrance and exit ports are each adapted to connect sealably with an IV tube and the cavity is sealed except for openings through the entrance and exit port; a valve seat attached to a cavity wall formed by the first unitary molded thermoplastic element; a flexible diaphragm responsive to fluid flow through the cavity and positioned adjacent to the valve seat to seal against the valve seat with fluid flow from the exit port to the entrance port and to unseal away from the valve seat with fluid flow from the entrance port to the exit port; and a filter medium disposed in the housing between the entrance port and the valve seat; wherein the filter medium is integrally bonded at its periphery to the first unitary molded thermoplastic element; and wherein the entrance port provides a radial ledge with a surface facing away from the cavity and wherein the periphery of the filter medium abuts and is bonded to the surface.