Electromagnetic apparatus
US7049916B2 · kind B2 · utility
2Cited by
3References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 21, 2005 |
| Grant date | May 23, 2006 |
| Priority date | — |
| Expiry date | Jan 21, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F2007/086
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electromagnetic apparatus includes a solenoid having a movable core for being attracted to a fixed core when a coil is energized, a shaft coupled to the movable core for displacement in unison with the movable core, and a valve mechanism having a ball for selectively opening and closing a passageway between an inlet port and an outlet port in response to the displacement of the shaft. The movable core has a nonmagnetic layer formed on an outer surface thereof and having a predetermined thickness.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.