Dust detection
US4586389A · kind A · utility
7Cited by
5References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 5, 1983 |
| Grant date | May 6, 1986 |
| Priority date | — |
| Expiry date | Oct 5, 2003 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2001/2223
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A portable aerosol dust spectrometer has an inlet section with a sampler entry having an entry efficiency for airborne dust approximately to that of the human head during inhalation, a clean-up stage to remove particles above 15 .mu.m and a main collection stage which is a cascade impactor. The cascade impactor classifies particles of dust and collects fractions onto a number of collection surfaces. A pump draws air or gas through the apparatus. The apparatus samples air in a similar way to the human body and yields fractions of dust for further study.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.