Richard Fan Pok

US Patent:

20090177187, Jul 9, 2009

Filed:

Sep 10, 2008

Appl. No.:

12/207874

Inventors:

Karla Weaver Quigley - Framingham MA, US
Steven Grantz - Pelham NH, US
Richard Pok - Malden MA, US
Anthony Hien - Stoneham MA, US
Kimberly Un - Lawrence MA, US

International Classification:

A61M 25/14
F16K 15/14

US Classification:

604537, 137845, 604247

Abstract:

A pressure actuated valve comprises a first membrane having a slit extending through the membrane at a nonzero draft angle relative to a perpendicular to a surface of the membrane, material of the membrane biasing the slit closed so that the slit remains closed when a fluid pressure applied to the membrane is below a threshold level and, when the fluid pressure is at least the threshold level, edges of the slit separate from one another to permit fluid flow through the membrane.