Electromagnetic actuator
US6501359B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 10, 2001 |
| Grant date | Dec 31, 2002 |
| Priority date | — |
| Expiry date | Sep 10, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49073
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
In a solenoid portion of a solenoid valve, a fixed core for axially attracting a plunger due to magnetic force generated by a magnetic coil is divided into two. One is a cylindrical yoke having an opening at an axial end and a bottom at the other axial end. The other one is a cylindrical stator core having a flange protruding radially outwardly at an axial end thereof. The bottom of the yoke is provided with a thick body portion having a center recess. The inner surface of the opening of the yoke is fitted to an outer surface of the flange and the inner surface of the recess of the thick body portion is fitted to an outer surface of the stator core. Accordingly, constructions of molding dies for manufacturing the yoke and the stator core are simple. Further, only limited surfaces of the yoke and the stator core, which are fitted to each other, need accurate dimensions so that magnetic gap is minimized.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.