ES422250A3 - Improvements introduced in three-piece fittings to couple channel and similar sections. (Machine-translation by Google Translate, not legally binding) - Google Patents

Abstract

Perfections introduced in three-piece fittings for coupling pipe sections and the like, comprising a female pipe, a male pipe, and a nut that can rotate and slide around one of these pipes, this pipe being provided with a stop, and externally presenting the other branch pipe a thread on which the nut can be screwed by tapping until it hits the stop, the male branch, comprising at least one outer surface that cooperates with at least one inner surface of the female socket, characterized in that said outer surface carries, from the end whereby the male socket enters the female socket, a first frustoconical surface with an angle at the small or null vertex, and a second frustoconical surface, with an angle at the vertex clearly greater, and by the fact that the aforementioned inner surface leads, from the ext oar by which the female socket receives the male socket, a frustoconical surface with a large angle at the apex, and a surface that is substantially cylindrical if the angle at the apex of said first surface is small but not zero, but which is frustoconical with an angle at the small vertex if the angle at the vertex of the aforementioned first surface is zero. (Machine-translation by Google Translate, not legally binding)