Patent ID: 8298195

Claim:
A needleless access port valve comprising: a valve housing comprising an inlet port, an outlet port, and an interior wall surface defining an interior cavity; a resilient piston made of a homogeneous material positioned within the interior cavity and having a solid upper section of a first diameter, a solid neck section of a second diameter, which is larger than the first diameter, and a mid-section of a third diameter, which is larger than the second diameter; wherein the interior cavity comprises an upper shoulder, a lower shoulder, and a plurality of flow passages for fluid flow between the piston and the interior wall surface of the housing; and wherein the neck section is compressed by the upper shoulder for fluid to flow from the inlet port towards the outlet port; the fluid flow being peripheral to the resilient piston; and wherein the mid-section is compressed by the lower shoulder of the valve housing to terminate fluid communication between the inlet port and the outlet port.