Patent ID: 6334554
Filing Date: 2002-01-01
Classification: B05C,F16K

Abstract:
A snuffback valve assembly for use in connection with the dispensing of highly viscous materials, comprising:a housing having an exit orifice defined therein through which highly viscous materials are to be dispensed; a valve seat member disposed upstream of said exit orifice and comprising a valve throat chamber through which highly viscous materials can be conducted toward said housing exit orifice; and a snuffback valve element movable between opened and closed positions with respect to said valve seat member and having an upstream throat portion for disposition within said valve throat chamber of said valve seat member so as to terminate flow of said highly viscous materials through said valve throat chamber of said valve seat member and toward said exit orifice when said valve element is disposed at said closed position and seated upon said valve seat member, and having a downstream end portion which is tapered so as to prevent bursting of said highly viscous materials from said exit orifice when said snuffback valve element is moved from said closed position to said opened position.