Thermal metal oxide varistor circuit protection device
US9570260B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 17, 2011 |
| Grant date | Feb 14, 2017 |
| Priority date | — |
| Expiry date | Aug 29, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2037/762
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A circuit protection device including a housing, a metal oxide varistor disposed within said housing, a terminal having a contact lead at a first end electrically attached to said metal oxide varistor by solder and having a second end extending outside of said housing, an arc shield disposed within said housing between said contact lead and said metal oxide varistor, a micro switch housed in a pocket portion of the housing, said micro switch having a trigger portion and an indicator portion disposed at least partially outside of said housing, said arc shield positioned against said trigger portion, and a spring configured to bias said arc shield away from said pocket portion and to move said arc shield away from said trigger portion when said solder is melted to provide a barrier between said metal oxide varistor and said contact lead, whereby the indicator portion is retracted into the housing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.