Metal working – Means to assemble or disassemble – Coupling to conduit
Patent
1990-09-20
1992-01-14
Echols, P. W.
Metal working
Means to assemble or disassemble
Coupling to conduit
29244, 29252, 29282, B23P 1904
Patent
active
050798162
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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Fisk Allan T.
Freed David I.
Bryant David P.
Coit Laurence
Echols P. W.
Electric Power Research Institute Inc.
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