Patent ID: 6315483
Filing Date: 2001-11-13
Classification: A46B

Abstract:
A one-piece fluid flow control valve for use in a fluid applicator tip which is connectable onto an open end of a resiliently squeezable bottle, comprising;a cup-shaped body formed of resilient material including a side wall and having a generally U-shaped longitudinal cross section which defines a hollow interior with an open end and an uninterrupted closed end, said body configured for coaxial alignment and seated retention within the applicator tip with said closed end oriented downstream of fluid flow through the applicator tip with respect to said open end;a normally closed slit formed into said side wall in close proximity to said closed end, said slit opening to permit fluid entering into the hollow interior to flow through the opened said slit when the bottle is squeezed to increase fluid pressure against said closed end to open said slit;said slit being normally closed when there is no substantial pressure within the bottle, preventing substantial fluid flow therethrough while also permitting air to flow therethrough in a reverse or upstream direction and drawn into the bottle after the bottle has been squeezed into a resilient distorted configuration to expel fluid and released.