JOINT AND JOINING METHOD FOR PLASTIC PIPE
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United States of America Patent
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app pub date -
Jun 12, 2008
filing date -
Jun 12, 2007
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Abstract
A coupling for joining socket ends of multilayer tubing through electrofusion including a central body having opposing male ends. A core at least partially surrounds the central body and an outer layer encloses the core and central body. The outer layer defines a flange protruding radially outwardly from the central body, wherein the core includes a portion that extends radially outwardly through the flange and out of the flange so that the core can be directly heated by an external heating element.
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