OPENTECHNICAL PUBLICATION
OT-2026-000003405

Positive seal coupling internal joining press

Published: 2026-09-15T20:23:11.419990Z
Permanent URL: https://opentechnical.org/p/OT-2026-000003405
Categories: Manufacturing & Assembly Equipment > Assembly Systems

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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.

1. Drawings

[0001] Sheet 1.

[0002] Sheet 2.

[0003] Sheet 3.

[0004] Sheet 4.

[0005] Sheet 5.

[0006] Sheet 6.

[0007] Sheet 7.

[0008] Sheet 8.

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OpenTechnical publication OT-2026-000003405
Published 2026-09-15T20:23:11.419990Z
https://opentechnical.org/p/OT-2026-000003405