Electromagnetic solenoids having controlled reluctance
US9997287B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 12, 2014 |
| Grant date | Jun 12, 2018 |
| Priority date | — |
| Expiry date | Mar 31, 2036 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49021
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An apparatus includes a housing, a solenoid coil disposed within the housing, a pole member, and an armature configured to move from a first position to a second position when the solenoid coil is energized. A contact surface of the armature is spaced apart from a contact surface of the pole member by a first distance when the armature is in the first position, and a second distance when the armature is in the second position. The housing, the pole member and the armature collectively define a flux path characterized by a first reluctance when the armature is in the first position and a second reluctance when the armature is in the second position. The difference between the first reluctance and the second reluctance is less than about thirty percent of the value of the first reluctance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.