Bushing including an expansion compensation seal
US4609775A · kind A · utility
8Cited by
5References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 31, 1984 |
| Grant date | Sep 2, 1986 |
| Priority date | — |
| Expiry date | Jul 31, 2004 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01B17/34
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
This invention is directed to an improved seal for an electrical conductor bushing operable in service above about 69 kV. Typically, the seal is interposed between the bushing cap and the porcelain. Two flat, thin non-metallic gaskets are stacked together and separated from each other by means of a rigid washer. The rigid washer is provided with a pair of inner and outer upstanding flanges which form a trough for engagement therein of one of the gaskets. The gasket-washer assembly provides oil-tight integrity for the bushing under standard industry cantilever and thermal expansion tests.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.