GUIDE TUBE FOR GUIDING CABLE OF INTERNAL OBSERVATION DEVICE AND CABLE GUIDING METHOD
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United States of America Patent
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Mar 16, 2017
app pub date -
Mar 5, 2014
filing date -
Mar 5, 2014
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Abstract
A guide tube guides a cable of an internal observation device into a pipe bore. The cable is pushed into the pipe bore to force an observation image capturing part provided proximate a tip end of the cable to approach a portion to be observed when performing internal observation of the pipe bore of a pipe-like structure with the internal observation device. The guide tube includes: an outside wall having an outside diameter of the guide tube that is substantially equal to an internal diameter of the pipe bore; and an internal wall having an internal diameter of the guide tube that is substantially equal to an outside diameter of the cable
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