Apparatus for measuring the consistency or hardness of a material
US4159640A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 1, 1978 |
| Grant date | Jul 3, 1979 |
| Priority date | — |
| Expiry date | Mar 1, 1998 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2203/0089
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus for measuring the consistency or hardness of a material, for example skin tissue on a living body, comprises a support to be applied against the material to be tested and a feeler movably carried by the support for displacement through a distance which will be proportional to the hardness or consistency being measured. To avoid the need for careful positioning of the device on the test material with a carefully constant bearing pressure, a control circuit is provided for recording the displacement of the feeler only when the bearing pressure of the support on the test material has a predetermined value. The reading of the displacement is held and is preferably digital. Application of the support successively to different points on the test material will enable a true comparison of the readings at the various points.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.