| 摘要 |
<p>A filter unit for tubes of dental aspiration apparatus, comprising a box structure (1) containing a collector (2) connected by a first conduit (3) to a suction pump (not shown) and, to second conduits 66' each controlled by an interposed valve (4,4'); each of the second conduits comprises a syphon in a central part wherein is situated a chamber housing a filter for the fluid aspirated by the tube; the filters being mechanically connected one to another in a single filter sequence and separated by a closed wall; the filters being inserted through an aperture into the unit, and the closed wall forming a separating wall between the chambers. <IMAGE></p> |
