Patent ID: 8113197
Filing Date: 2012-02-14
Classification: A61M,Y10S,Y10T

Abstract:
1. A flow regulation vent for venting washout gas to atmosphere and for regulating flow from a pressurized gas supply, comprising: a fixed portion adapted to engage a gas supply conduit; a spring force biased movable portion structured for flowing communication with the pressurized gas supply; and a hinge pivotally connecting the movable portion to the fixed portion; wherein the fixed portion has a gas flow orifice and the movable portion is pivotally movable between 1) a relaxed position, wherein below a specified operating pressure, the movable portion is pivoted by the spring force to a position away from the fixed portion to establish a first gas washout flow area between the movable portion and the gas flow orifice, and 2) a fully pressurized position, wherein at or above the specified operating pressure, the pressurized gas offsets the spring force to pivot the movable portion to a position adjacent the fixed portion to cover at least a portion of the gas flow orifice and establish a second gas washout flow area between the movable portion and the gas flow orifice, wherein the second gas washout flow area is less than the first gas washout flow area and, wherein the hinge provides at least a portion of the spring force and the fixed portion and the movable portion are unitarily formed from a single piece of material.