Method and apparatus for removal of utility line and replacement with polyolefin pipe
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United States of America Patent
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May 13, 1997
Grant Date -
N/A
app pub date -
Apr 28, 1995
filing date -
Apr 28, 1995
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The present invention is directed to a method for removing a utility pipe or main and replacing the main with a polyolefin pipe. More specifically, the unique apparatus or system of the present invention includes a rotating head connected to a plurality of pipe joints to remove the old pipe, usually concrete or tile, by cutting, chipping and grinding. The head has an outer periphery of roller bits which cut, chip and grind the old pipe or earth into pieces which pass inwardly through the head. Behind the head is a non-rotating member which opens and packs the hole formed by the head for the replacement polyolefin pipe which is pulled into the hole by the member.
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