Electromagnetically operated valve
US5240227A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 8, 1992 |
| Grant date | Aug 31, 1993 |
| Priority date | — |
| Expiry date | Jun 8, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F7/088
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The electromagnetically operated valve communicating with a pressurized fluid in an oil-filled chamber, includes an armature (17) resiliently retained in an armature chamber (16) of a housing (10) by membrane springs (22,23); an armature-operated valve body (20) movable with clearance in a hole (34) provided in the housing (10) and a compression spring (40) biasing the armature. The armature chamber (16) is hermetically sealed in the housing from a valve part (15) against which the valve body (20) is urged by the compression spring and contains a damping fluid for damping motions of the armature. The housing is also provided with a first compensating chamber (44) communicating with the armature chamber (16) to compensate for a volume change of the damping fluid and with a second compensating chamber (46) connected with the first compensating chamber via a duct (45). The second compensating chamber is filled with air and communicates with the oil-filled chamber filled with the pressurized fluid so that dirt and other particles in the pressurized fluid cannot reach the damping fluid of the armature chamber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.