Patent ID: 8074671
Filing Date: 2011-12-13
Classification: A47L,B01D,Y10S,Y10T

Abstract:
1. A valve assembly that comprises a valve comprising: an X-shaped structure, a first vane including a rounded pivot end and a second vane including a rounded pivot end; wherein the rounded pivot end of the first vane is fixed into a first angle of the X-shaped structure and the rounded pivot end of the second vane is fixed into a second angle of the X-shaped structure, the second angle being opposite the first angle, and the first angle and the second angle being equal; wherein each vane comprises a first flat port-closing edge for closing a port in the X-shaped structure that opens into a space in a vicinity of a vacuum port; and a second flat port-closing edge for closing a port in the X-shaped structure that opens into a space in a vicinity of an inlet through which dusty air enters; the first vane disposed for servicing a pair of such ports in the first angle; the second vane disposed for servicing a pair of such ports in the second angle.