Energy absorbing contact arm stop
US6639168B1 · kind B1 · utility
13Cited by
172References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 6, 2000 |
| Grant date | Oct 28, 2003 |
| Priority date | — |
| Expiry date | Sep 6, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H77/104
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A circuit breaker cassette comprises a housing having a fixed contact, and a movable contact on a contact arm. The contact arm is positionable in a closed position and an open position, wherein the contact arm is closed when the movable contact is in contact with said fixed contact. A spring biases the movable contact arm towards the closed position A kinetic energy-absorbing stop is positioned to absorb kinetic energy of the contact arm resulting from magnetic repulsive forces forcing the movable contact and the fixed contact apart during a short circuit condition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.