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Article: Norwegian Inventors Develop Rotation Unit
- Article from:
- US Fed News Service, Including US State News
- Article date:
- October 21, 2008
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ALEXANDRIA, Va., Oct. 21 -- Per Slettedal of Ovrebo, Norway, and Terje Egeland of Kristiansand, Norway, have developed a rotation unit of torque tong. According to the abstract released by the U.S. Patent & Trademark Office: "A rotation unit for a torque tong for making and/or breaking threaded connections between pipes and/or spinning pipes during screwing and/or unscrewing of pipes, primarily pipes used in petroleum production. The unit includes a fixed part and a rotary part arranged to grip a pipe to be rotated. The rotary part includes at least one movable gripping jaw arranged to be moved into engagement with the pipe. The fixed part includes at least one gripping cylinder ...