Electromagnetic fluid flow control valve
US7252114B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 13, 2005 |
| Grant date | Aug 7, 2007 |
| Priority date | — |
| Expiry date | Nov 9, 2025 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/86847
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electromagnetic actuator status defines two pairs of poles between which an elongate magnetisable armature can see-saw through a mid position between two home positions defined by two of the poles. A closed low reluctance path in each home position includes a permanent magnet which keeps the armature in either home position. An electromagnet is energised by a current pulse, to repel the armature from one home position and attract it to the other. Resilient energy storage means resists the final movement of the armature towards each pole. A non-magnetisable curved central region of the armature makes rolling contact with a complementary curved surface with the stator to cover and uncover openings therein. The stator is housed within, or forms a fluid chamber and fluid supplied thereto can be delivered selectively through one or the other of the two openings.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.