Apparatus for producing a spray of droplets of a liquid
US4829996A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 24, 1987 |
| Grant date | May 16, 1989 |
| Priority date | — |
| Expiry date | Feb 24, 2007 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05B5/087
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Apparatus, for example an inhaler, is disclosed in which a spray is formed electrostatically from an outlet 6 to achieve uniform droplet size. The spray is then discharged for its intended use--in the example inhaling. The spray is discharged completely by corona produced by a sharp discharge electrode 16 which is charged to a polarity opposite that of the liquid. In order to prevent the corona from spoiling the formation of the spray itself, the liquid of the outlet 6 is protected by a neutral shield electrode 8. The spray issues through a hole 14 in the shield electrode. The hole is sufficiently small to prevent corona getting through, yet sufficiently large to allow the spray through.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.