Powder fluidizing devices and portable powder-deposition apparatus for coating and spray forming
US6715640B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 3, 2002 |
| Grant date | Apr 6, 2004 |
| Priority date | — |
| Expiry date | Sep 30, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S977/89
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The invention relates to a powder-fluidizing and feeding device for use with coating and spray forming nozzles and guns. The device includes novel provisions for controlling and feeding powder from a hopper to a vibrating bowl, for heating and vibrating powders in the hopper to dissipate agglomeration and clumping of the powder, and for metering powders from a vibrating bowl to the spray nozzles and guns using a feedback control derived from powder mass loss rate measurements. The device is particularly useful for feeding ultra-fine and nanoscale particles, which are difficult to feed uniformly with the prior art of conventional powder feeders.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.