Circuit breaker having semi-moving piston
US5859399A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 24, 1997 |
| Grant date | Jan 12, 1999 |
| Priority date | — |
| Expiry date | Nov 24, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H33/905
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A puffer type circuit breaker comprising a compression chamber closed by a pressure wall of a semi-moving piston, a first mechanism for preventing the piston from moving during a first portion of the opening displacement of the moving contact assembly, and a second mechanism for axially displacing the piston together with the moving contact assembly during the second portion of the same displacement. The piston includes a cylindrical guide portion secured to the wall. The first mechanism comprises an abutment member disposed between the end of the guide portion of the piston and a fixed retaining part, said abutment member being retractable. The second mechanism comprises an arrangement for retracting the abutment member, and acting at the end of the first displacement portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.