Patent · US Expired

Method and device for controlling the outflow of a fluidized solid from a container

US5800876A · kind A · utility

4Cited by

3References

5Claims

0Family size

Assignee

ABB RESEARCH LTD. · CH

Inventors

Gunter Borner · Radevormwald, DE
Johann Nienburg · Heidelberg, DE
Jorg Sopka · Schwetzingen, DE
Josef Wittmann · Hockenheim, DE

Key dates

Filing date	Feb 20, 1997
Grant date	Sep 1, 1998
Priority date	—
Expiry date	Feb 20, 2017

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S118/05
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

A method and a device for controlling the outflow of fluid powder from a container can be used for controlling the expulsion of powder out of a powder-spraying apparatus for electrostatic coating. The disadvantages of a mechanical closing device are avoided by introducing closing air into an extraction pipe for extracting fluidized powder out of a container. The closing air is introduced through a pipe which opens into an orifice in the casing of the extraction pipe. The mass flow of fluidized powder can be controlled by an appropriate setting of a pressure in the extraction pipe in relation to the pressure in the fluid bed, that is to say by the introduction of closing air at an appropriate pressure.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.