Pipe joints or couplings – With casing – lining or protector – Lined
Reexamination Certificate
2003-12-26
2008-11-18
Hewitt, James M (Department: 3679)
Pipe joints or couplings
With casing, lining or protector
Lined
C285S347000, C285S382000, C285S423000
Reexamination Certificate
active
07452004
ABSTRACT:
A pipe connecting structure which can prevent electrical charge of a plastic coated metal pipe using a simple structure. The structure includes beads5a, 5b, 5cprotruding from the outer surface of the end of a plastic coated metal tube3, which is obtained by coating the outside of a bare metal pipe1with a nonconductive plastic film2. The plastic film2is removed from the tip of the bead5ato expose the circumferential surface of the bare metal pipe1, the exposed portion is made to contact the inner surface of a conductive tube4, and the plastic coated metal tube3and the conductive tube4are connected together.
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Hewitt James M
Posz Law Group , PLC
Sanoh Industrial Co., Ltd.
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