Fluid handling – With repair – tapping – assembly – or disassembly means – Tapping a pipe – keg – or apertured tank under pressure
Reexamination Certificate
1999-03-01
2001-03-20
Walton, George L. (Department: 3753)
Fluid handling
With repair, tapping, assembly, or disassembly means
Tapping a pipe, keg, or apertured tank under pressure
C030S092000, C251S267000
Reexamination Certificate
active
06202673
ABSTRACT:
FIELD OF THE INVENTION
The present invention refers to a valve self-piercing tap for a plastic tube.
BACKGROUND OF THE INVENTION
A self-piercing tap of this kind is known from DE 44 08 817 C1, comprising a plastic housing which is provided with a branch connection member and in which a valve is inserted with the help of a plurality of sealing rings, both between the housing and the valve as well as between the components of the valve. The branch sleeve projecting into the branch connection member is designed as a separate part. A tap of this kind comprises a complicated construction and is lavish during assembly. The sealing rings are subjected to aging and, thus, become leaky.
It is the object of the invention to provide a valve self-piercing tap which essentially avoids the use of sealing rings that are separately to mount and which is of simple design and mounting.
SUMMARY OF THE INVENTION
To meet this and other objects, the present invention provides a self-piercing valve tap for a piping made of plastic material. The valve tap comprises a housing made of plastic material. The housing has an inlet opening as well as a branch connection member. A valve body is located in the interior of the housing. Further provided is a valve seat in the interior of the housing and located close to the inlet opening of the housing.
The outer surface of the valve body is provided with one or a plurality of continuous circumferential groove(s) and one or more continuous circumferential leg portion(s) directed towards the valve seat. The housing is injection molded around the valve bush member such that the circumferential groove is or the circumferential grooves are filled up along their entire extension with the plastic material of the housing.
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patent: 9723747 (1997-07-01), None
Georg Fischer Rohrleitungssysteme AG
Tarolli, Sundheim, Covell, Tummino & Szabo L.L.P
Walton George L.
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