Method for on-line monitoring of lubricating oil using light in the visible and near IR spectra
US7172903B2 · kind B2 · utility
7Cited by
18References
8Claims
0Family size
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Key dates
| Filing date | Mar 4, 2003 |
| Grant date | Feb 6, 2007 |
| Priority date | — |
| Expiry date | Dec 26, 2024 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T436/216
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Oil aging and particulate building in a lubricant other than one exposed to combustion products is monitored by detecting light transmitted through the lubricant at least one, and preferably, two or more preselected wavelengths over a pathlength greater than about 0.5 cm wherein one wavelength is in the near infra-red spectrum and/or one wavelength is in the visible or near infra-red spectrum. The detected light when compared to predetermined values provides an indication of the condition of the lubricant.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.