Patent ID: 7404713
Filing Date: 2008-07-29
Classification: B29C

Abstract:
1. A shut-off valve mechanism for an injection molding system, said valve mechanism comprising: a housing assembly comprising a cap member and shell member; an outer body member positioned in said housing assembly and having an internal passageway therein and a first external flange member thereon; a coil heater member positioned in said housing assembly and substantially along the axial length of said outer body member, said heater member maintaining material in said shut-off valve mechanism at a prerequisite temperature; said heater member being spaced from said shell member; a movable inner body member positioned in said internal passageway, said movable inner body member having a central passageway and first valve member thereon and a second external flange member thereon; a pin member having a second valve member thereon, said pin member having a pin body member in contact with said outer body member and a pin head member positioned in said central passageway of said inner body member, said second valve member positioned on said pin head member; said first and second valve members forming a valve mechanism which when closed prevents the flow of material therethrough and which when open allows the flow of material therethrough; and a spring biasing member positioned between said first and second external flange members and biasing said valve mechanism to said closed position.