Patent ID: 6422849
Filing Date: 2002-07-23
Classification: B29C,B29L,B32B

Abstract:
An injector device for use in repair of cracks in glass through in evacuation of the crack void and injection of repair chemical, said injector device comprising:an injector shell having a generally cylindrical shape, with an open upper and an open lower end, and having a liquid repair chemical storage reservoir formed towards the upper end, an injector tip ring seat formed at the lower end, a bore formed coaxially through the cylindrical shell to form a repair chemical communication path between the reservoir and the lower end of the shell, said bore including an O-ring seat formed circumferentially about said bore for receiving an O-ring, and a means for mounting a handle and injector rod assembly to the injector shell; an O-ring disposed in said O-ring seat in the bore; a resilient injector tip ring disposed in said injector tip ring seat; a handle and injector rod assembly, movably attachable to said means for mounting on said injector shell, said handle and injector rod assembly having an injector rod of sufficient diameter to be received in said bore of the injector shell with sufficient clearance between said rod and said bore for flow of liquid repair chemical, and also of sufficient diameter to form an air-tight and liquid-tight seal when positioned in contact with said O-ring; and an integral valve for applying vacuum and pressure at said injector shell lower end, said valve comprising a portion on the injector rod having less diameter than the general diameter of the rod such that three rod positions are selectable by an operator including a first rod position for applying pressure to a crack in glass and for storage of resin between repair operations in which the valve causes pressure at the lower end of the injector shell and prevents the flow of fluid from said reservoir to said injector shell lower end, a second rod position in which a fluid and gas communication path is provided by said valve between said reservoir and said injector shell lower end, and a third rod position in which the valve causes a vacuum at the lower end of the injector shell and prevents the flow of fluid from said reservoir to said injector shell lower end.