Patent ID: 7302965
Filing Date: 2007-12-04
Classification: F16L,Y10T

Abstract:
1. A saddle tap to be mounted on a resin pipe comprising: a saddle mounted on said resin pipe by thermal fusion welding; a branching barrel including a straight piping portion having an internally threaded hole longitudinally extending therealong and a branch portion extended from the middle of said straight piping portion, wherein said straight piping portion stands at the one end thereof on said saddle; a hole-drilling cutter with a rotating tool detachably connected thereto, and having, at one end thereof, a cutting edge integrally formed therewith, wherein said hole-drilling cutter has an externally threaded barrel portion and is screwed into said internally threaded hole of said straight piping portion so that said hole-drilling cutter is longitudinally movable; a cap detachably mounted on the other end of said straight piping portion of said branching barrel for closing said internally threaded hole; and a valve seat installed at the one end of said straight piping portion of said branching barrel and having a valve hole communicating with said internally threaded hole of said straight piping portion so that said cutting edge of said hole-drilling cutter is inserted in said valve hole in a watertight manner, wherein said valve seat comprises a heat-resistant bush made of a metal, having a center hole as said valve hole and engaged with the other end of said straight piping portion of said branching barrel in a watertight manner.