Lightning arrestor with a thermoplastic envelope having an embossed outside surface
US5875090A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 19, 1997 |
| Grant date | Feb 23, 1999 |
| Priority date | — |
| Expiry date | Dec 19, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01C7/126
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The lightning arrestor has two metal end fittings for connection purposes, a stack of electrically conductive components extending along a longitudinal axis between the two end fittings, and an envelope surrounding the electrical components and the end fittings in such a manner as to maintain electrical contact between the components. The envelope is made of a thermoplastic material that molded over the electrical components and the end fittings. It has an embossed outside surface including depressions and projections. The depressions correspond to zones of reduced envelope wall thickness and they serve to constitute lateral openings through the envelope for allowing gas to escape to the atmosphere.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.