Linear motor and machine tool having the same mounted thereon
US7768159B2 · kind B2 · utility
2Cited by
10References
2Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Sep 25, 2007 |
| Grant date | Aug 3, 2010 |
| Priority date | — |
| Expiry date | Aug 28, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K7/1185
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present invention provides a linear motor 1 that can prevent a magnet member 2 from falling down when a power supply is turned off. A linear motor 1 includes a magnet member 2 composed of permanent magnets having alternately arranged respective N poles and S poles and a coil member 3 which surrounds a periphery of the magnet member 2 and trough which the magnet member 2 is movable in an axial direction relative to the coil member 3. A magnetic substance 3 is provided in the vicinity of one end of the coil member 3 to allow the magnet member 2 to exert a magnetic attractive force.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.