Suction device such as a dental aspirator or sucker

Claim 1

In a suction tube intended as saliva sucker or surgical sucker comprising a cylindrical plastic tube (10) at least one portion of whose length is provided with a corrugation in the form of bellows folds having ridges and intermediate grooves, the bellows folds having sides (16, 17) of different widths which are so shaped and disposed that upon axial compression of the respective folded portion of the tube, the narrower sides (16) will snap over a center position to a position under the adjacent wider sides (17), whereafter any bending of the compressed portion for shaping the tube will result in the bend portion substantially remaining in its bent position; the improvement in which the bottoms of the grooves (20) have a plurality of suction openings (21) which are substantially evenly distributed along the circumference of the respective groove, one end of the tube being adapted to be connected to a suction source whereas the other end (11, 14) of the tube is closed, the suction openings being open (20a) not only when the bellows folds are in the extended position, but also when the bellows folds are in their compressed position.