Armature with vent passages for vehicle actuator
US7252282B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 15, 2005 |
| Grant date | Aug 7, 2007 |
| Priority date | — |
| Expiry date | Oct 16, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F7/1607
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
In a vehicle solenoid valve, the spool that holds the actuation coil is formed with a hexagonal or octagonal inner chamber in which a cylindrical armature can slide. Owing to the different cross-sectional shapes between the spool and armature, a longitudinal fluid vent passageway is established along each edge of the chamber between the non-cylindrical walls of the chamber and the cylindrical armature so that movement of hydraulic fluid relative to the armature is promoted when the armature moves. The face of the spool that is oriented toward the valve end can be formed with radial vent grooves to further facilitate fluid venting when the armature moves.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.