| 摘要 |
Fluid-tight device for seals of articulated pipes which is comprised of two terminals with their corresponding threads for fixing them to the runs of pipe. Each terminal has a neck topped by a spherical shell, the two spherical shells retaining two spherical heads with axial passage, extended in both necks of different diameters and telescopically connected and which comprise a helical spring whose extremities rest on internal steps of the heads. Said heads are provided inside a cylindrical housing with the ends thereof being spherically narrowed and provided with annular internal channels for installing annular seals. |
