Water pipe coupling with off-centered piercing assembly for...

Pipes and tubular conduits – With closures and plugs – Test plugs

Reexamination Certificate

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Details

C138S089000, C137S068190, C137S068300, C073S049800, C073S049100

Reexamination Certificate

active

07343936

ABSTRACT:
A coupling used during testing of a water line including an upstream pipe and a downstream pipe connected by the coupling. A removable barrier disk prevents water from flowing through the connected pipes until after testing, when the disk is then detached from the body member of the coupling. A piercing assembly interacts with a groove near the perimeter of the disk to initiate a tear that propagates along the groove as the disk is pulled away from the body member of the coupling. The piercing assembly is attached to the disk by a fulcrum element offset with respect to a center of the planar disk.

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