Linear driving device
US5317221A · kind A · utility
47Cited by
5References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 28, 1992 |
| Grant date | May 31, 1994 |
| Priority date | — |
| Expiry date | Aug 28, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K41/0356
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A linear driving device includes a hydrostatic gas bearing, a shaft supported by the bearing, and a voice-coil motor for driving the shaft in a direction of movement. The bearing and the shaft are disposed within the voice-coil motor. The device further includes a locking mechanism for constraining the movement of the shaft in its direction of movement. In addition, the voice-coil motor includes a coil assembly having a coil. The coil assembly forms a closed space surrounded by the coil. The coil assembly has a plurality of exhaust holes therein communicating with the outside from the closed space.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.