Low-compression puffer circuit-breaker
US6018133A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 10, 1998 |
| Grant date | Jan 25, 2000 |
| Priority date | — |
| Expiry date | Aug 10, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H33/905
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A circuit-breaker of the puffer type, comprising two arcing contacts, at least one of the arcing contacts being part of a moving contact assembly made up of a first tube co-operating with a second tube to define a blast chamber, and a compression chamber closed by a semi-moving piston, the circuit-breaker being provided with first means for holding the piston stationary during a first portion of the displacement stroke of the moving contact assembly between the closed position and the open position, and with second means for displacing the piston axially with the moving contact assembly during a second portion of the same displacement stroke. The first means for holding the piston stationary comprise a stationary retaining member for locking an abutment arrangement associated with the piston, and the second means for axially displacing the piston comprise an unlocking member for unlocking said abutment arrangement, which member is associated with the moving contact assembly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.