Solenoid valve
US5566921A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 8, 1994 |
| Grant date | Oct 22, 1996 |
| Priority date | — |
| Expiry date | Aug 8, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F2007/1692
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
In a solenoid valve, a gap is formed between a solenoid, which includes a stator housed within a resin mold, and a retainer that secures the solenoid on a housing. The gap communicates with a armature chamber that houses the armature mounted on a front end of a plug valve. High-pressure fuel is charged from the fluid passage into the armature chamber and flows into the gap around the solenoid to apply even pressure to the periphery of the resin mold as well as to the intake end surface of the solenoid. This prevents deformation of the resin mold and, consequently, distortion of the intake end surface. Such distortion can also be prevented by internally fitting a protective plate made of a non magnetic body in the opening ends of the coil grooves formed in the intake end surface of the stator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.