Pipetting method and apparatus
US4926701A · kind A · utility
40Cited by
16References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 9, 1989 |
| Grant date | May 22, 1990 |
| Priority date | — |
| Expiry date | Mar 9, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T436/2575
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A pipetting device comprising a probe for dipping into a reservoir, reaction vessel or the like, a metering pump connected to the probe and a shutoff valve disposed between the probe and the pump are provided. In the intake phase of the pump with the valve open, first air and then a predetermined quantity of liquid is intaken. For at least some of the delivery phase of the pump the valve is in the closed state so that a pressure builds up in the pump. At the end of the delivery phase the valve opens whereby due to the high pressure any adhering liquid particles are expelled.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.