Method and apparatus for high pressure water treatment of the inside of a pipe section
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United States of America Patent
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Nov 19, 2019
Grant Date -
Apr 6, 2017
app pub date -
Dec 19, 2016
filing date -
Jul 14, 2014
priority date (Note) -
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status (Latency Note)
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Abstract
Material lining the inside surface of a section of pipe is removed by a hydrodemolition nozzle assembly mounted on a working end of an elongated boom. The opposed end of the boom is supported outside the pipe on a movable support for inserting and retracting the boom from the inside of the pipe. The nozzles remove the liner while the working end of the boom is supported by a wheel resting on the liner that has not yet been removed and that rolls along the inside liner as the pipe is made to revolve around the boom. The nozzles are oriented to eject the liner and water downstream and away from the boom.
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