Apparatus for polishing interior surfaces of pipes or the like
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United States of America Patent
Stats
-
Nov 29, 1983
Grant Date -
N/A
app pub date -
Oct 1, 1981
filing date -
Aug 28, 1981
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A pipe polishing apparatus of the type in which a polisher rod is extractably inserted into a pipe to be polished and polishing grains are injected into a gap between the polisher rod and pipe while rotating the rod and pipe in opposite directions for polishing the interior surface of the pipe. The polisher rod has an outside diameter which is reduced stepwise or continuously in the polishing grain injecting direction to eliminate the localized abnormal abrasion of the polishing surface or the so-called 'bell mouth phenomenon.'
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