Patent ID: 6938520

Claim:
A backup tong for securing a tubular against axial rotation in response to rotation of another tubular by a pipe rotating device, the backup tong comprising: a backup tong plate supporting a left side fluid powered cylinder, a right side fluid powered cylinder, and a gripping head spaced generally along a centerline of the backup tong plate for gripping the tubular; a left side swing arm and a right side swing arm each pivotally connected to a respective left side fluid powered cylinder and right side fluid powered cylinder; a left side cam plate and a right side cam plate each supported on one of the backup tong plate and a respective left side swing arm and right side swing arm; a left side cam follower and a right side cam follower each supported on the other of the backup tong plate and the respective left side swing arm and right side swing arm for cooperation with the left side cam plate and the right side cam plate, respectively; and a gripping head on a forward end of each of the left side swing arm and the right side swing arm for gripping the tubular.