Probe position actuator with an elongated stroke
US6163090A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 16, 1999 |
| Grant date | Dec 19, 2000 |
| Priority date | — |
| Expiry date | Jun 16, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R1/06705
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A linear actuator includes a stationary stator and an external armature moving with a coil moving within a magnetic structure. A linear bearing including a stationary track fastened to the stator and a moving track fastened to the armature extends on each side of the magnetic structure. In each linear bearing, balls rotate between the stationary and moving tracks with movement of the armature. During the process of manufacturing the linear actuator, the moving track of each linear bearing is loosely mounted to the armature, a pre-load force is applied to the moving track using a tool fastened to the armature, and the moving track is clamped in place so that the pre-load force is subsequently maintained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.