Electromagnetic actuator for a hydraulic directional control valve
US8136790B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 9, 2009 |
| Grant date | Mar 20, 2012 |
| Priority date | — |
| Expiry date | Jun 24, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F2007/085
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electromagnetic actuator for a hydraulic directional control valve is provided. The electromagnetic actuator is used for adjusting a hydraulic directional control valve, for example, for the variable adjustment of the control times of an internal combustion engine. The electromagnetic actuator includes a housing (08) with which the electromagnetic actuator is mounted opposite the hydraulic directional control valve. The electromagnetic actuator further includes a coil (01) that is arranged in a coil body (03). The electromagnetic field that can be generated with the coil (01) acts on an armature (09) that is arranged in the electromagnetic actuator so that it can move axially. In order to prevent that the hydraulic medium of the hydraulic directional control valve leaks from reaching the electromagnetic actuator, the actuator includes a seal (13; 24) between the coil body (03) and the housing (08). The coil body has a holder (26, 28) for holding the seal (24). The holder (26, 28) guarantees the holding of the seal (24) in the coil body at least during the assembly of the electromagnetic actuator, so that when the coil body is introduced into the housing (08), the seal (24) remai…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.