| 摘要 |
An improved adjustably directed clean air supply assembly, which is operated to direct clean air in a selectable direction through a designated volume where an activity is being undertaken. The assembly includes a pre-filter (142) covering a lower housing (122), the lower housing including an interior powered air moving assembly (162). The assembly further includes a tower hollow housing (54) located above and supported by the lower housing (122), wherein an adjustable height telescoping structural tube (58) is mounted in the tower hollow housing (54) for vertical positioning and limited rotational positioning. The assembly further includes a self sealing bellows (60) and a top filter head assembly (326) attached to the self sealing bellows (60), for final filtering through a HEPA filter (68). The top filter head assembly is angularly adjustable through a tilt adjustment assembly (62) located within the bellows (60).
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