Patent ID: 6770062
Filing Date: 2004-08-03
Classification: A61M,Y10T

Abstract:
An automatic high negative pressure relief valve a portion of which is in fluid communication with a chamber, said relief valve comprising:a housing having an interior compartment; a biasing mechanism, a sealing member moveably disposed within the housing and being operably coupled to the biasing mechanism, wherein the sealing member includes a through aperture therein; and wherein the sealing member includes a flexible member that extends between interior surfaces of the housing dividing the interior compartment into first and second sub compartments, where the first sub compartment is fluidly coupled to the chamber and the second sub compartment is fluidly coupled to a gas source; wherein the biasing member urges the sealing member against a seating surface to close the relief valve when the differential pressure developed across the sealing member is less than a predetermined value, wherein the seating surface comprises a conically shaped member and wherein the end of the through aperture sealingly engages the conically shaped member; and wherein the sealing member moves away from the seating surface to open the relief valve and to fluidly couple the chamber to the gas source when the differential pressure developed across the sealing member is less than a predetermined value.