Rotation unit for torque tong comprising a gripping cylinder

Details Rotation unit for torque tong comprising a gripping cylinder Rotation unit for torque tong comprising a gripping cylinder

2004-02-26

2008-10-21

Shakeri, Hadi (Department: 3723)

Tools

Wrench, screwdriver, or driver therefor

Machine

C081S057160, C081S057190

Reexamination Certificate

active

07437974

ABSTRACT:
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 arranged to move the gripping jaw to engage the pipe when the gripping jaw is operatively engaged with the gripping cylinder.

REFERENCES:
patent: 5159860 (1992-11-01), Pietras
patent: 6684737 (2004-02-01), Schulze-Beckinghausen et al.
patent: 6829967 (2004-12-01), Kemp
patent: 0 339 005 (1989-10-01), None
patent: 1 357 253 (2003-10-01), None

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