Rebound-type hardness tester
US6354148B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 5, 2001 |
| Grant date | Mar 12, 2002 |
| Priority date | — |
| Expiry date | Feb 5, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N3/52
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A rebound-type hardness tester comprises a tubular member and an indenter hammer for undergoing axial movement therein in forward and rearward directions and for impacting a specimen and rebounding therefrom. A first detecting device detects the indenter hammer during movement thereof in the forward and rearward directions. A second detecting device detects the indenter hammer after detection thereof by the first detection device during movement of the indenter hammer in the forward direction, and detects the indenter hammer before detection thereof by the first detection device during movement of the indenter hammer in the rearward direction. A measuring device measures first and second timing values corresponding to different times elapsed from the detection of the indenter hammer by the first and second detection devices. A calculating device calculates an impacting velocity and a rebounding velocity of the indenter hammer in accordance with the first and second timing values and a distance between the first and second detecting devices. A processing device calculates a hardness of the specimen in accordance with the impacting velocity and the rebounding velocity calculated by t…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.