Measurement device
US11859969B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 28, 2022 |
| Grant date | Jan 2, 2024 |
| Priority date | — |
| Expiry date | Dec 13, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01B5/28
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A measurement device includes: a probe part including a probe configured to measure a surface of an object to be measured and is attached so as to swing around a swing center according to a shape of the surface of the object to be measured; a scale configured to measure displacement by swinging of the probe part; a scale head configured to read a scale mark of the scale; and an arm part to which the probe part is attached, the arm part is attached so as to swing around the swing center integrally with the probe part, and the scale is attached to the arm part. When thermal expansion coefficients of the probe part, the arm part and the scale are α, β and γ respectively, the measurement device satisfies a condition of (α+γ)−1/2α≤β≤(α+γ)+1/2α.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.