Pipette device having a throttle point in the pipette duct
US8656792B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 26, 2011 |
| Grant date | Feb 25, 2014 |
| Priority date | — |
| Expiry date | Jan 23, 2032 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01L2400/06
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A pipette device including a metering liquid receptacle designed to be filled, at least in part, with working fluid and which has a pipette opening as a first tapering of cross-section of flow, a pressure change device which is designed to change the pressure of the working fluid in the metering liquid receptacle, and a throttle point in a pipette duct designed to be filled with working fluid as a further tapering of cross-section of flow. The throttle point is arranged fluid-mechanically between the metering liquid receptacle and the pressure change device and is dimensioned in such a way that a ratio of a flow resistance of the pipette opening for dispensed metering liquid to a flow resistance of the throttle point for working fluid, which flows through the throttle point when the metering fluid is dispensed, is less than 0.5.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.