| 摘要 |
<p>A spittle separation and disposal device is disclosed that incorporates a drainage pump and forms part of the suction equipment used in dentistry. The device comprises a separator vessel (1) fitted with a drain valve (2); the drainage pump (8), located downstream of the valve and kept normally at standstill, is set in motion by a control signal from level sensors (9, 10) within the vessel, whenever liquid in the vessel itself rises to a prescribed level. The vessel has a lid (3) provided with an element (14) in the form of a cone frustum the inside of which communicates with a port connected to an air pump, and the internal surface of which exhibits a number of helical starts (15) disposed in opposition to the helical pattern tern of movement of the air which is drawn up through the element by the air pump.</p> |
