Lockable enclosure with gripping-toggle device for securing access to the hollow interior of cylindrical pipes
作者： James Gordon Burgess
DOI:
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摘要: The present invention is an enclosure for securing selective access to the hollow interior of cylindrical pipes. preferred embodiment comprises a selectively engagable toggling mechanism contained within body which transmits removal forces into increased frictional resistance forces. Toggling cross-arms provide by gripping inner wall pipe. device may also include pipe seal and vent.
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