Surface texture measurement apparatus and roundness measuring apparatus
US7950164B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 7, 2010 |
| Grant date | May 31, 2011 |
| Priority date | — |
| Expiry date | Jul 7, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01B5/28
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A roundness measuring apparatus includes: a stylus having a contact part; a holding member that holds the stylus while allowing displacement of the contact part; an elastic member that presses the contact part against a measurement target object; a detector holder that supports the holding member rotatably; a motor; an elastic force adjustment member that is rotatable and concentric with the holding member; a joining section that joins the elastic force adjustment member with the holding member to maintain relative rotational positions; and a restricting section that restricts rotation of the elastic force adjustment member at a predetermined rotational position. The displacement direction of the contact part is adjusted in a first rotation range. The rotational position of the holding member relative to the rotational position of the elastic force adjustment member changes with the rotation of the elastic force adjustment member being restricted in a second rotation range.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.