Linear motor
US4678951A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 28, 1984 |
| Grant date | Jul 7, 1987 |
| Priority date | — |
| Expiry date | Nov 28, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/5521
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A linear motor driving a carriage used in a magnetic memory. The motor includes a rotor portion having a hollow sleeve like member extending outwardly from the carriage at the side opposite to the magnetic head mounting portion of the carriage and a driving coil wound around the forward end of the hollow member; and a stator portion on the frame body of the magnetic memory and having a central yoke disposed within the hollow member along the direction of carriage movement, a U-shaped yoke surrounding the driving coil with the legs thereof being parallel to the central yoke, and a pair of permanent magnets mounted on the opposed faces of the legs of the U-shaped yoke. By means of this linear motor, the magnetic memory can be reduced in dimension.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.