Device for measuring contamination of lubricant
US4699509A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 19, 1985 |
| Grant date | Oct 13, 1987 |
| Priority date | — |
| Expiry date | Apr 19, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2021/0392
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In a lubricant contamination measuring device, an optical path gap is provided between a light source window at a light source side and a light receiving window at a light receiving element side. A lubricant having an amount of contaminant to be measured in accordance with a light transmittance is present in the optical path gap and the length of the optical path gap is selected to be shorter than a predetermined length. At least one of the light source and light receiving windows has a convex shape, and the center of the convex window is in contact with a surface of the other window. Thus, the amount of contaminant in the lubricant can be measured up to a high contamination range.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.