Electrofusion method and device
US6127662A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 16, 1998 |
| Grant date | Oct 3, 2000 |
| Priority date | — |
| Expiry date | Mar 16, 2018 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2023/22
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method of joining a first pipe of a plastic material to a second pipe of a material which does not bond well to the plastic material, utilizes an electrofusion sleeve of a plastic material which bonds well to the plastic material of the first pipe and having a first coil of electrical heater wire on the inner surface at one end of the sleeve to receive the first pipe and a second coil of electrical heater wire on the inner surface at the opposite end of the sleeve to receive the second pipe. The opposite end of the sleeve includes a bonding material capable of producing a good bond, when activated by heat, between the materials of the sleeve and of the second pipe. The two pipes are inserted into the two ends of the sleeve, and electrical current is applied to the two coils to cause the first end of the sleeve to bond by electrofusion to the first pipe, and the second end of the sleeve to bond by electrofusion and by the bonding material to the second pipe.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.