Spray device
US6848633B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 25, 2002 |
| Grant date | Feb 1, 2005 |
| Priority date | — |
| Expiry date | Apr 25, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N1/38
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In an aspirating and dispensing/spraying device, a holder is screwed onto a tube, connected to a liquid supply line, in such a way that it is displaceable along the tube by rotation. The tube is surrounded at a distance by a coaxial sleeve, which is solidly anchored in the holder, having a discharge opening on its front end, which is conically narrowed, whose edge surrounds the front end of the tube, which carries a outlet opening, separated by a narrow annular gap from the tube. The sleeve carries a connecting piece laterally, to which a pressurized gas supply line is connected and which discharges eccentrically into the space between the sleeve and the tube, so that pressurized gas flowing in receives angular momentum. When the gas flows out of the annular gap, it mixes intensively with the liquid coming out of the outlet opening and forms a discharge cone made of a fine, symmetrical aerosol with the liquid. This aspirating and dispensing/spraying device is simultaneously implemented as a pipette for aspirating liquids through the outlet opening of the tube's front end, said tube carrying a sensor near said outlet opening for detecting a liquid surface during pipetting.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.