Patent ID: 7841364

Claim:
A pipe plug for plugging the interior cylindrical surface of a pipeline, the pipeline having a radially extending cylindrical opening, the pipe plug comprising: a carrier longitudinally extendable through said cylindrical opening and into said pipeline; a first plugging head having an elastomeric sealing element with a circumferential sealing surface and being pivotally connected to said carrier and extendable at a right angle thereto; a second plugging head having an elastomeric sealing element with a circumferential sealing surface and being pivotally connected to said first plugging head and extendable at a right angle to said carrier and in axial alignment with said first plugging head, said elastomeric sealing elements being configured to sealably engage the internal circumferential surface of the pipeline; and a spring biased pivot arm extending forward of said second plugging head and serving to pivotally engage said pipeline interior cylindrical surface and guide said second plugging head as the pipe plug is inserted through said cylindrical opening and into the pipeline.