Patent ID: 7318451
Filing Date: 2008-01-15
Classification: B01D,F01M,F16K,Y10S,Y10T

Abstract:
1. A flapper valve assembly for use with a fluid device having a flow chamber with respect to which intermittent flow is desired, the flapper valve assembly comprising: a valve plate having a fluid port area defining a valve orifice therethrough for communication with said flow chamber, the fluid port area having opposed first and second sides, one of said sides including a retaining area spaced from the valve orifice and adapted to be spaced from the fluid device; the fluid port area having at least one slot extending therethrough in the retaining area; a flexible flapper having a fixed end portion including at least one transverse tab adapted to pass through said slot, so that the flapper engages the fluid port area, said tab having multiple resilient tangs extending laterally on either side of the tab and disposed to engage the retaining area to prevent rotation of the flapper; the flapper having a free end portion movable from a first position where the free end portion at least partially blocks flow through the valve orifice, to a second position where the free end portion unblocks the valve orifice; and bias means associated with the flapper for urging the free end portion into the first portion.