Particle measuring apparatus
US4419879A · kind A · utility
4Cited by
17References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 16, 1981 |
| Grant date | Dec 13, 1983 |
| Priority date | — |
| Expiry date | Oct 16, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N15/04
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A particle size analyzer of the sedimentation type in which a cup-shaped member is used to deposit the particles in the sedimentation fluid substantially simultaneously and at low velocity. The particles are ultrasonically dispersed as they are deposited in the fluid and are collected by a balance member which detects their receipt as a function of time. An electronic circuit connected to the balance member determines the size of the particles through the use of Stokes' Law and an empirically determined relationship between the settling velocity of the particles and their size.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.