| 摘要 |
A filter support casing and filter provides powder into a Bernoulli flow system. The system has an upper end and a lower end, the upper end having an opening therein. The filter support casing extends downward from the upper end. There is a filter supported within the casing. The filter support casing and the filter define an internal volume within both the filter support casing and the filter. The volume is exposed to the opening in the upper end and as later explained is flow connected into a gas stream that will carry particles and spray particles. The casing has at least two concentric elements, a first inner elements and a second outer element, that rotate with respect to each other and which slide with respect to each other. The two elements rotate about their concentric positions and slide along their lengths. The first inner element is contiguous (adjacent and/or touch and adjacent) with the filter. The first inner element encloses the filter with arms (fingers, extensions, posts, etc.) extending from a top of the first inner element to a bottom of the first inner element. The arms provide an open area between arms between the top of the first inner element and the bottom of the first inner element.
|
