Flat lamination solenoid
US6550745B2 · kind B2 · utility
8Cited by
15References
15Claims
0Family size
Inventors
Key dates
| Filing date | Dec 19, 2000 |
| Grant date | Apr 22, 2003 |
| Priority date | — |
| Expiry date | Dec 19, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F2007/1676
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A variable reluctance solenoid includes an armature and a yoke located axially beyond one end of the armature. Magnetic attraction across an axial gap between the armature and yoke causes the armature to move axially and close the gap. The armature includes ferromagnetic laminations lying in a plane perpendicular to the axial direction. These laminations may include slots, proportioned and directed to combat eddy currents and reduce moving mass while avoiding creation of flux bottlenecks. The solenoid may have two yokes on opposite sides of the armature, providing reciprocating armature motion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.