82 results about "Aspirator" patented technology

An aspirator is a type of ejector-jet pump, which produces vacuum by means of the Venturi effect. In an aspirator, fluid (liquid or gaseous) flows through a tube that first narrows and then expands in cross-sectional area. When the tube narrows, the fluid pressure decreases. In this narrow area the fluid velocity must increase to conserve mass continuity. Where the tube narrows, a vacuum is drawn because of the Venturi effect.