Linear encoder
US9506778B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 30, 2015 |
| Grant date | Nov 29, 2016 |
| Priority date | — |
| Expiry date | May 14, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D5/34753
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A linear encoder includes a plate-type scale and a head which moves along the longitudinal direction of the scale. The scale has graduations formed on a surface of the scale and arranged along the longitudinal direction of the scale. The head includes a reading part which detects an amount of a relative movement of the head with respect to the scale by reading graduations formed on the scale. The head includes four bearings each having a rotation axis extending along the transverse direction of the scale. Each of the bearings is situated on the head so as to abut against a surface of the scale, to function as a spacer to maintain a distance between the scale and the head. The scale acts as a plate member interposed between the reading part and the graduations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.