Electrofusion fitting and sealing method for distribution line
US5321233A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 15, 1992 |
| Grant date | Jun 14, 1994 |
| Priority date | — |
| Expiry date | Sep 15, 2012 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16L47/345
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An electrofusion fitting for sealing a distribution line, or main, includes upper and lower arcuate sleeve members securely coupled together about the line by means of nut and bolt combinations. Extending radially from the upper sleeve member is a cylindrical flange with a threaded end portion through which a line tapping tool may be inserted for either inserting a seal in the line or for coupling a branch line to the distribution line. A pair of electrodes extending from the upper sleeve member form an electrofusion circuit with a heating conductor disposed intermediate the line and upper sleeve member for forming a fusion bond therebetween. A sealing gasket is disposed about the flange opening in the upper sleeve member to provide an immediate, temporary seal between the upper sleeve member and the line to permit rapid sealing of the line followed by permanent electrofusion sealing of the fitting on the line permitting the immediate tending to any necessary repair work to the line. The fitting is preferably comprised of polyethylene for secure bonding to a distribution line of like composition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.