Electro-fusion fitting and control apparatus therefor
US4486650A · kind A · utility
43Cited by
2References
12Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Sep 27, 1982 |
| Grant date | Dec 4, 1984 |
| Priority date | — |
| Expiry date | Sep 27, 2002 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C66/949
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An electro-fusion fitting for coupling thermoplastic pipes incorporates a heating coil (2) and has a resistor (6) with a value chosen in accordance with the power to be supplied to the coil connected between a main terminal (4) and an auxiliary terminal (5). Control apparatus is adapted to sense the resistance value and supply electric current to the coil for a predetermined time set automatically according to the resistance value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.