Metal pipe coupling
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United States of America Patent
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-
Mar 29, 1994
Issued Date -
N/A
app pub date -
Jan 22, 1993
filing date -
Oct 16, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
This invention relates to a device for coupling lengths of metal pipe, too hard or to thin for cutting a screw, by inserting a screwed socket in one end of the pipe to be joined with another, expanding that part of the pipe, and joining it airtight with another coupling. A metal pipe coupling of the present invention has a screw section and a tightening section, and is shaped so as to be suitable to the way of coupling metal pipes by insertion of one end of a metal pipe in the coupling, expanding the fastening section of the metal pipe so that the joining of the outside circumference of the pipe and the inside circumference of the coupling should be airtight, and thereafter by joining with another joining material.
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