Encoder for shaft device comprising one such encoder and production method thereof
US7646314B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 1, 2005 |
| Grant date | Jan 12, 2010 |
| Priority date | — |
| Expiry date | Mar 19, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D5/14
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention relates to displacement encoder for a movable shaft, comprising a sleeve (2) which is intended to be fixed in rotation to the shaft (3) and an encoding element (4) which is made from magnetizable polymer and which is solidly connected to the sleeve, said encoding element being equipped with an encoding zone (6) having at least one polarized mark. The aforementioned encoding zone of the encoding element is covered with a protective layer (10) which is made from a polymer having a surface abrasion resistance greater than that of the magnetizable polymer. The invention also relates to a device comprising one such encoder and to a production method thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.