Adjustable pipe bend with electrofusion facility
US5156420A · kind A · utility
15Cited by
8References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 28, 1991 |
| Grant date | Oct 20, 1992 |
| Priority date | — |
| Expiry date | Aug 28, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C66/71
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An adjustable pipe bend which has at least two parts joined by flanges (10, 10a) which incorporate an electrical fusion element in the form of a plastic annular disc (15) with a heater wire (16) located at or adjacent both surfaces of the disc. A number of embodiments of the invention illustrate different adjustable bends, the arrangement being that the bend is adjusted to a required position and then the heater wire has a voltage applied to it to produce a heating current which causes the plastic annular disc and adjacent plastic faces of the flanges to melt sufficiently to cause fusion between the two parts of the pipe.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.