Patent ID: 8012433
Filing Date: 2011-09-06
Classification: G01N,Y10T

Abstract:
1. A device for dispersing a sample of dry powder onto a surface in a dispersion chamber, comprising: a dispersion chamber situated in an environment; a pressure source that provides a pressure difference between the environment and an inside of the dispersion chamber; a surface positioned in the dispersion chamber; means for opening and closing the dispersion chamber; and means for introducing the sample of dry powder into the dispersion chamber comprising a membrane that is interposed between the environment and the inside of the said dispersion chamber and on which the sample is disposed, the membrane being rupturable so as to open the dispersion chamber when a predetermined pressure difference across the membrane is exceeded, permit entry of a fluid in the environment through the ruptured membrane, and move the dry powder sample in an evenly dispersed manner without producing an ordered movement of powder grains in the dispersion chamber.