Patent ID: 8057129
Filing Date: 2011-11-15
Classification: B05B,B65G

Abstract:
1. A device for conveying powder coating material, comprising: a conveying chamber, said conveying chamber comprising a gas permeable filter element encircled by an annular housing with an annular space therebetween, said conveying chamber having an inlet end that is connectable to a reservoir of powder coating material, said conveying chamber having an outlet end that is axially opposite said inlet end and that is connectable to a delivery line, a first opening in the housing and a first air line connected between said first opening and a source of negative pressure, a second opening in the housing and a second air line connected between said second opening and a source of compressed gas, said first opening being formed in said housing closer to said outlet end of said conveying chamber than said second opening, and said second opening being formed in said housing closer to said inlet end of said conveying chamber than said first opening, whereby when negative pressure is applied through said first air line and said first opening to said annular space, powder coating material is drawn into said gas permeable filter element, and wherein when compressed gas is applied through said second air line and said second opening to said annular space, powder coating material is forced out of said gas permeable filter element.