Liquid droplet spray device
US6805303B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 3, 2002 |
| Grant date | Oct 19, 2004 |
| Priority date | — |
| Expiry date | Feb 13, 2023 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05B17/0646
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The invention concerns a liquid droplet spray device for atomising a liquid substance, comprising a housing comprising a first substrate, a second substrate superposed on the first substrate and a space enclosed by said first and second substrates for containing the liquid substance. An outlet means is arranged in at least one of said first or second substrates and comprises at least one outlet nozzle (19) and at least one output channel (20) connecting the space (12) to each outlet nozzle (19). A vibrating element (18) is disposed to vibrate liquid in said space (12) so as to eject said liquid substance as a spray through said outlet nozzles (19). According to the present invention, each output channel (20) has a first portion (20a), a second portion (20b) and a third portion, said first portion being arranged adjacent said space (12) and having straight sidewalls, said third portion also having straight sidewalls, the width of said first portion being larger than the width of said third portion, said second portion connecting said first portion to said third portion such that the width of the output channel changes progressively from the width of said first portion to the width o…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.