Rotary device
US4958098A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 23, 1987 |
| Grant date | Sep 18, 1990 |
| Priority date | — |
| Expiry date | Nov 23, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S310/06
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A rotary device is disclosed for use as a precision element such as an optical scanner. The device comprises a rotor which includes a driven element such as a polygon having a plurality of mirror surfaces thereon, an arrangement for supporting the rotor for rotational movement, and a drive motor for the rotor. The rotor supporting arrangement includes a thrust bearing. In order to provide a rotary device having a low profile and a minimum of parts, a planar motor is used as the drive motor, and the permanent magnet of the motor is incorporated in the rotor. The thrust bearing includes an arrangement for directing an axial force against a radial surface of the rotor when the motor is actuated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.