05184391 is referenced by 6 patents and cites 18 patents.

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.

Title
Process of press fitting pipe sections together to form a pipeline
Application Number
566022
Publication Number
5184391
Application Date
October 15, 1991
Publication Date
February 9, 1993
Inventor
David I Freed
Weston
MA, US
Allan T Fisk
Needham
MA, US
Agent
Laurence Coit
Assignee
Electric Power Research Institute
CA, US
IPC
B23P 19/02
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