1
Allan T Fisk, David I Freed: Positive seal coupling internal joining press. Electric Power Research Institute, Laurence Coit, January 14, 1992: US05079816 (3 worldwide citation)

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 c ...


2
Fisk Allan T, Freed David I: Positive seal coupling internal joining press.. Electric Power Res Inst, July 7, 1993: EP0549719-A1

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 c ...


3
Fisk Allan T, Freed David I: Positive seal coupling internal joining press. Electric Power Research Institute, COIT Laurence, April 2, 1992: WO/1992/005010

This invention is a new apparatus for installing press fit couplings about steel pipeline sections. Conventional apparatuses are extremely large, usually requiring extensive mounting equipment, and are incapable of being used in the confined spaces of a pipe trench. This invention solves the problem ...