Patent ID: 8408880

Claim:
A jet suction pump, comprising: a propulsion jet nozzle with a round nozzle opening having a width, a mixing pipe, a suction line coupled to the mixing pipe, and a pot including a sidewall housing and a bottom, wherein the mixing pipe extends into the sidewall housing of the pot and includes an outlet opening that opens downwardly into the pot, and wherein the bottom of the pot includes: a non-curved planar surface perpendicular to an axial direction of the propulsion jet nozzle, the non-curved planar surface extending in a single planar direction over substantially the entire bottom of the pot except in the location of one or more swirl-producing elements extending from the non-curved planar surface, the one or more swirl-producing elements configured to receive a downwardly-directed non-swirled flow of liquid delivered by the propulsion jet nozzle and produce a swirl in the flow of liquid to facilitate sealing off of the nozzle opening by the liquid, wherein the one or more swirl-producing elements include one or more ribs extending from the non-curved planar surface.