A linear actuator has inner yokes, outer yokes forming gaps between themselves and the inner yokes, and a movable body provided with planar magnets in the gaps. Eight pieces each of the inner yokes and the outer yokes are arranged at equal angular intervals in a circumferential direction with planar faces of each of the inner yokes and the of the outer yokes being opposed to each other. The movable body has magnet retaining portions having a substantially triangular shape and placed between adjacent inner yokes and between adjacent outer yokes. A linear actuator having high magnetism usability can be structured using magnetic parts suitable for mass production.

 
Web www.patentalert.com

< Inter-stage plasma source

< Method and device for detecting the speed of a pump

> Motor-driven compressors

> Hydraulic pig advance system comprising a control volume chamber containing hydraulic fluid and a force transmitting member

~ 00230