Electromagnetic contactor
US4947146A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Mar 8, 1989 |
| Grant date | Aug 7, 1990 |
| Priority date | — |
| Expiry date | Mar 8, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H50/021
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electromagnetic contactor is formed by disposing an inner yoke to oppose at an end to a pole-contacting member provided at an end of an armature in an electromagnet block, disposing the outer yoke to oppose at an end to the said end of the inner yoke so as to restrict the displacement of the pole-contacting member and at the other end to a plunger part of the armature perpendicularly and closely thereto, and inserting a magnetic cylinder into an axial through hole of a coil bobbin of the electromagnet block for passing therethrough the plunger part from the side of the said other end of the outer yoke, whereby any leak of magnetic flux due to coil excitation and that of a permanent magnet disposed between the both yokes can be restrained to be the minimum and a highly efficient operation of the contactor can be realized.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.