Pipe piercing fitting and valve
AssigneeFriatec AG Keramik- und Kunststoffwerke
InventorNorbert Friedel
Life of this patent
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Abstract
A combination pipe piercing fitting and valve including a housing formed of a weldable plastic and having a valve casing communicating with a branch nipple. In the valve casing a valve stem and a boring tool are disposed for axial movement so as first to pierce a pipe welded to the housing and to then selectively open or close the branch nipple from the pipe. A sleeve for guiding the boring tool is axially and rotationally secured in the valve casing and extends at least past the area where the branch nipple enters the valve casing. This guide sleeve has a valve seat at its bottom end and an opening adjacent the branch nipple. This combination fitting and valve assures high operating reliability without leakage both during piercing of the pipe and during operation as a valve.
Claims17
A combination pipe piercing fitting and valve comprising a housing which can be bonded by welding to a pipe, said housing comprising a valve casing containing a guide sleeve and a valve stem with a boring tool guided in said guide sleeve for axial movement in order to pierce said pipe and selectively open and shut a branch nipple communicating with the valve casing at a junction, wherein said guide sleeve is axially and rotationally secured in said valve casing and extends at least over the junction of said valve casing and said branch nipple, and said guide sleeve has an opening therethrough adjacent said branch nipple for communication between said pipe and said branch nipple after said pipe has been bored, and said guide sleeve has a bottom end formed as a valve seat for said boring tool between said branch nipple and said pipe, said opening being selectively opened and shut by axial movement of said boring tool along said guide sleeve.
Dependencies are inferred from the claim text.