Narrow diameter needle having reduced inner diameter tip
US7111799B2 · kind B2 · utility
4Cited by
12References
27Claims
0Family size
Inventors
Key dates
| Filing date | Aug 20, 2001 |
| Grant date | Sep 26, 2006 |
| Priority date | — |
| Expiry date | Jan 24, 2023 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC25D7/04
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Tubular needles have a reduced inner diameter tip portion that increases back pressure behind the tip portion. This constricted tip portion promotes improved atomization, particularly when the liquid passes through the needle at near-supercritical conditions. A preferred method for constricting the inner diameter of a needle tip is to dip the dip of the needle in an electroless plating solution, such as an electroless nickel solution.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.