Backup tong with swing arms

Details Backup tong with swing arms Backup tong with swing arms

2005-09-06

2005-09-06

Thomas, David B. (Department: 3723)

Tools

Wrench, screwdriver, or driver therefor

Machine

C081S057160, C081S057240

Reexamination Certificate

active

06938520

ABSTRACT:
A backup tong10secures the tubular against axial rotation in response to rotation by a power tong. The backup tong plate20supports a pair fluid powered cylinders32, 34, and a pair of swing arms50, 52each pivotally connected to the respective fluid powered cylinder. A left side cam plate44and a right side cam plate46are each provided for cooperation with a respective left side and right side cam follower58, 60. The gripping head30provided on the backup tong plate, and a pair of gripping heads62, 64are provided on a forward end of each of the swing arms for gripping the tubular. A method of the invention includes supporting the fluid powered cylinders on the backup tong plate, and pivotally connecting the swing arms to the respective fluid powered cylinders. The cam followers move within respective cam plates during actuation of the cylinders.

REFERENCES:
patent: 4402239 (1983-09-01), Mooney
patent: 4574664 (1986-03-01), Curry
patent: 5702139 (1997-12-01), Buck
patent: 5778742 (1998-07-01), Stuart

Affiliated with

Also associated with

Rating

Backup tong with swing arms does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Backup tong with swing arms, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Backup tong with swing arms will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3389049