Bistable magnet
US4910487A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 31, 1989 |
| Grant date | Mar 20, 1990 |
| Priority date | — |
| Expiry date | Jul 31, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F7/088
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Bistable magnet, in particular for the actuation of valves and the like, with a movable piston that has a pole face and that is held by a permanent magnet in one of its two stable positions, wherein this piston has a stop face that is provided with a damping plate and that with an opposing face that is built stationary into the housing defines an end position of the piston. To avoid switching noises without decreasing the holding forces it is provided that, in addition to the stop face on the piston, a pole face is provided that interacts with a stationary pole face and that a device that guides the magnetic flux and bridges the air gap between these pole faces is provided between these pole faces.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.