Electrofusion marker

Details Electrofusion marker Electrofusion marker

B - Operations, Transporting

29

C

327/116

B29C 65/34 (2006.01) B29C 65/68 (2006.01) F16L 47/03 (2006.01) G01V 15/00 (2006.01)

Patent

CA 2013791

F.N. 44019 CAN 4A Abstract of the Disclosure An electrofusion marker which fuses two pipe sections together and acts as a passive electronic marker. The electrofusion marker includes a tubular thermoplastic fitting having a coil therein, which is temporarily energized by a power supply. This heats the fitting, causing it to fuse with the pipe sections. The coil doubles as an inductor, and a capacitor connected in parallel with the coil creates a resonant LC circuit. After the pipe sections have been fused together and buried, the joint may be thereafter located by emitting a signal into the ground, which is picked up by the resonant circuit and re-radiated. The radiated signal is detected by a receiver, indicating location of the electrofusion marker and joint.

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