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This is a record of a document published elsewhere, first published by the United States Patent and Trademark Office, as US-5172613-A, on 22 December 1992. OpenTechnical did not first disclose it. The identifier, hashes and timestamps below record what this library served and when, not when the material became public. View the original.

OT-2026-000003391

Power tongs with improved gripping means

Published
Permanent URL
Classification
Tools & Tooling › Clamping Tools
Inventors
WESCH JR WILLIAM E
Assignee
WESCH JR WILLIAM E
Original source
US-5172613-A, the United States Patent and Trademark Office, 22 December 1992
Document SHA-256
d8442dfd19563a4c1ba61ba8561a5e1d93c9ca930dc325a340da6248ecdf0ab9

Power tongs and the back-ups are disclosed which have improved means for gripping pipe and tubular members. Torque is applied and held with minimum damage to the pipe or tubular member. A plurality of gripping assemblies, each consisting of a pivoted jaw having a friction surface, are mounted on a drag ring. Rotational resistance is selectively applied to the drag ring to cause the jaws to make contact with or be released from the pipe prior to any torque being applied to the pipe. Various modifications of the gripping assemblies are disclosed to provide better gripping contact with the pipe.

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Abstract

Power tongs and the back-ups are disclosed which have improved means for gripping pipe and tubular members. Torque is applied and held with minimum damage to the pipe or tubular member. A plurality of gripping assemblies, each consisting of a pivoted jaw having a friction surface, are mounted on a drag ring. Rotational resistance is selectively applied to the drag ring to cause the jaws to make contact with or be released from the pipe prior to any torque being applied to the pipe. Various modifications of the gripping assemblies are disclosed to provide better gripping contact with the pipe.

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Publication information

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Citation

OpenTechnical Publication OT-2026-000003391, “Power tongs with improved gripping means,” published September 15, 2026 at 20:20:50 UTC, https://opentechnical.org/p/OT-2026-000003391.

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Terms

This record reproduces a document published elsewhere and is provided for reference and study. Rights in the original remain with its owner. See the publication policy.