Brake check handheld refractometer
US6034762A · kind A · utility
6Cited by
7References
41Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 28, 1999 |
| Grant date | Mar 7, 2000 |
| Priority date | — |
| Expiry date | Jan 28, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N21/43
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A refractometric apparatus and method for monitoring the percentage of water in hydraulic fluids employ a temperature sensitive device allowing a user to obtain accurate and correct readings of various measured properties. In particular, the temperature sensitive member comprises a prism-wedge-mirror combination in conjunction with a bimetallic strip. The combination ensures the proper angular displacement of a light beam inside the refractometric apparatus and, therefore, the correct reading of a parameter to be measured.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.