Method and apparatus for aspirating and dispensing liquids
US6322752A · kind A · utility
30Cited by
24References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 8, 1999 |
| Grant date | Nov 27, 2001 |
| Priority date | — |
| Expiry date | Sep 8, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N35/10
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and apparatus for aspirating and dispensing precise volumes of liquid, e.g. whole blood, comprises an aspiration probe or needle having an internal volume precisely equal to a desired volume to be dispensed, and a computer-controlled shear valve for trapping aspirated liquid inside the probe for subsequent dispensing. A liquid sensor positioned downstream of the shear valve cooperates with a liquid level sensor on the probe tip to assure that the probe lumen is filled with the aspirated liquid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.