Transition coupling between metal and plastic piping systems
US6746055B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 31, 2002 |
| Grant date | Jun 8, 2004 |
| Priority date | — |
| Expiry date | Jul 31, 2022 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16L19/086
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A coupling for a transition between a plastic pipe and a metal piping system. In one embodiment, the transition coupling includes an adapter nut having a first end for connection with the metal piping system. A stiffener tube, affixed in the adapter nut, has an external diameter less than an internal diameter of the plastic pipe. An adapter coupling is connected to a second end of the adapter nut. A hollow gripper is positioned within the adapter coupling having an internal circumferential surface configured to grippingly engage the plastic pipe after axial insertion. At least one toroidal elastomeric seal is received over a groove in the stiffener tube to engage the plastic pipe.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.