Branching unit for boring without stopping passage of fluid
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United States of America Patent
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Apr 17, 2012
Grant Date -
Mar 12, 2009
app pub date -
Sep 17, 2008
filing date -
Jun 21, 2007
priority date (Note) -
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status (Latency Note)
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Abstract
A branching unit for boring without stopping passage of fluid, which is suitable for forming an opening 11 at a pipe wall 12 by boring a part of the pipe wall 12 of an existing pipe 1 using a drill machine 3 having a hole saw 4 to connect a branch pipe to the existing pipe, comprising: a sealing case 20 having plurality of separate casing 21, 22 separated in a circumferential direction R and a branch pipe portion 27 protruding and branching off in the radial direction C; a valve body 5 rotating between an inner circumferential surface 29 of the separate casing 21, 22 and an outer circumferential surface 13 of the existing pipe 1 to open and close a branch hole 28; and a rotation mechanism 50 rotating the valve body 5.
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