Form measuring machine
US9518811B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 26, 2015 |
| Grant date | Dec 13, 2016 |
| Priority date | — |
| Expiry date | Aug 14, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01B5/20
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A measuring force includes a stem, an arm, a detector, a rotation fulcrum, and a measuring force adjuster. A probe which makes contact with a workpiece is provided on the stem. An end portion of the arm is joined to the stem. The rotation fulcrum acts as a fulcrum for a rotating motion of the stem and the arm. The detector detects a displacement amount of the rotating motion of the arm. A crossed spring of the rotation fulcrum imparts on the stem and the arm a torque around an axis of the rotating motion in accordance with the displacement amount of the rotating motion. The measuring force adjuster imparts on the arm and the stem a torque, in a reverse direction of the torque generated by the crossed spring, by an attraction force generated by a magnetic force between at least two magnetic members mutually arranged at opposite ends.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.