Tillslutningsmekanism för suganordningen av en tandvårdsmaskin

摘要

The invention concerns a shutoff valve mechanism (40) for use in conjunction with the oral evacuator of a dental unit, said mechanism being connectable to a suction tube (14) communicating with a vacuum pump. The valve of the shutoff valve mechanism (40) comprises a valve portion (48) and a compatible seating portion (42), of which portions one is permanently attached to said body part (53) and the other to an adapter member (41) for the suction tube (14). The shutoff valve mechanism incorporates an articulated joint assembly (45,51,54) capable of opening the shutoff valve mechanism by rotation about an axis or axes oriented nonparallel with the center axis (K-K) of the shutoff valve mechanism (40). The valve is closed and stays closed (Fig. 3A) by virtue of vacuum maintained in the suction tube (14).