Apparatus for servicing gas lines

F - Mech Eng,Light,Heat,Weapons – 16 – L

Patent

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189/12

F16L 55/00 (2006.01)

Patent

CA 1163579

ABSTRACT OF THE DISCLOSURE An apparatus and method for working on a section of gas main while it is in service comprising a work chamber formable around a section of the gas main and having means for admitting a tool thereto in a manner that it can be manipulated from out- side the work chamber; means for removing the tool from the work chamber while maintaining the work chamber under gas pressure and means for safely evacuating the work chamber of gas.

393623

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