Split magnet drive
US4163164A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 11, 1977 |
| Grant date | Jul 31, 1979 |
| Priority date | — |
| Expiry date | Oct 11, 1997 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K5/128
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
One of two permanent magnets used to drive pumps and the like is split--i.e., the annular permanent magnet is split into two annular members, one fixed to one of the rotating members, the other freely rotatable independent of the other. The structure provides for recoupling without having to stop the driving magnet when decoupling has occurred. It also provides free travel and/or dynamic damping to alleviate oscillation and sporadic decoupling. The member fixed for rotation is a permanent magnet; the other is preferably a permanent magnet but may also be of a material which is magnetically permeable, in which case damping only is accomplished.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.