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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-5079816-A, on 14 January 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-2026-000003405

Positive seal coupling internal joining press

Published
Permanent URL
Classification
Manufacturing & Assembly Equipment › Assembly Systems
Inventors
FISK ALLAN T, FREED DAVID I
Assignee
ELECTRIC POWER RES INST
Original source
US-5079816-A, the United States Patent and Trademark Office, 14 January 1992
Document SHA-256
0af161e6d6754ff1a1b5c513a31d5fe6658f710a58052ef96ca6fcfd32478c40

This invention is a new device for installing press fit couplings to join steel pipelines. This apparatus is a joining press which fits inside the pipes to be joined and grabs them on their inside surfaces. It then pulls the pipes together, forcing the pipe ends into the coupling. The invention is comprised of two hydraulically operated grippers to grip the pipe and a hydraulically operated cylinder to pull the pipes together. The entire press is controlled using only two hydraulic lines. The grippers can be retracted and the apparatus moved within the pipeline from one joint to the next.

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Abstract

This invention is a new device for installing press fit couplings to join steel pipelines. This apparatus is a joining press which fits inside the pipes to be joined and grabs them on their inside surfaces. It then pulls the pipes together, forcing the pipe ends into the coupling. The invention is comprised of two hydraulically operated grippers to grip the pipe and a hydraulically operated cylinder to pull the pipes together. The entire press is controlled using only two hydraulic lines. The grippers can be retracted and the apparatus moved within the pipeline from one joint to the next.

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Publication information

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Citation

OpenTechnical Publication OT-2026-000003405, “Positive seal coupling internal joining press,” published September 15, 2026 at 20:23:11 UTC, https://opentechnical.org/p/OT-2026-000003405.

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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.