Incremental stepping assembly for a rotary actuator
US4891722A · kind A · utility
Inventor
Key dates
| Filing date | May 27, 1988 |
| Grant date | Jan 2, 1990 |
| Priority date | — |
| Expiry date | May 27, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/4806
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A rotary actuator for testing of magnetic disks having a rotary arm pivotally attached to an actuator housing at a first end and having at least one transducer at an opposite end. The rotary arm is mounted to the hub of a motion transfer wheel segment having an arcuate outer edge. A bearingless motor-powered drive roller is in frictional contact with the arcuate outer edge to impart rotational motion to the wheel segment. A pair of pressure wheels contact the drive roller to form a triangle of rollers and to positionally capture the drive roller against the arcuate outer edge. Rotation of the drive roller is translated to the rotary arm via the wheel segment, and causes the transducer to move along an arcuate path across a magnetic disk to be tested.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.