Protection device
US4456941A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 23, 1982 |
| Grant date | Jun 26, 1984 |
| Priority date | — |
| Expiry date | Sep 23, 2002 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2083/206
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electric motor protection device comprising a body, an electric strip, a plunger, and pressure and temperature sensitive snap discs. The electric strip moves from a current conductive, closed position to a current nonconductive, open position when the current conducted through the strip exceeds a preset level. The plunger engages the electric strip also to move the strip from the closed position to the open position. The pressure and temperature discs move from normal positions to overcenter positions to engage the plunger and move the electric strip from the closed position to the open position, respectively, when the vapor pressure forces on the pressure disc and the temperature of the temperature disc exceed preset values.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.