Venturi nozzle assembly construction in a shallow well pump casing

A venturi nozzle assembly in a centrifugal pump casing, said assembly comprising:

• a supply and recirculation fluid cylindrical intake tube defining a supply fluid intake passageway therethrough and having opposite inner and outer threadless end portions with openings defined respectively thereat, a first annular seal-receiving seat formed on said intake tube about said outer end portion thereof, a side opening in said intake tube at a location between said opposite inner and outer end portions thereof, and a generally elbow-shaped pipe disposed within said intake tube and extending in a generally transverse relation thereto, said pipe defining a recirculation fluid intake passageway therethrough and having first and second cylindrical threadless ends with openings defined thereat and being oriented at approximately ninety degrees with respect to one another, said pipe at its first end being integrally connected with said intake tube and being disposed in communication with said side opening of said intake tube, said pipe at its second end being disposed in concentric relation with said intake tube and spaced radially inward therefrom and, at its second end opening, facing toward but spaced from said inner end portion of said intake tube;
• a venturi tube having a hollow body defining a supply and recirculation fluid transfer passageway therethrough, said body having tandemly-disposed and integrally-connected outer substantially cylindrical and inner frusto-conical portions and opposite outer and inner threadless end portions with openings defined respectively thereat, said inner threadless end portion of said body being defined on said inner frusto-conical portion thereof and said outer threadless end portion of said body being defined on said outer cylindrical portion thereof, a cylindrical rim formed on said inner end portion of said body and having an inside diameter greater than the inside diameter of said outer end portion thereof and greater than the outside diameter of said inner end portion of said intake tube for receiving said inner end portion of said intake tube within said cylindrical rim in a slip fit relation for attachment of said intake tube and venturi tube together, and a second annular seal-receiving seat formed on said exterior surface of said body about said outer end portion thereof;
• and,
• a nozzle having a hollow member defining a recirculation fluid injecting passageway therethrough, said member having tandemly-disposed and integrally-connected inner cylindrical base and outer frusto-conical nose portions and opposite inner and outer threadless ends with openings defined thereat, said inner threadless end of said member being defined on said inner cylindrical base portion thereof and said outer threadless end of said member being defined on said outer frusto-conical nose portion thereof, and an outer cylindrical edge portion and an inner annular flange portion defined in a tandem arrangement on said inner threadless end of said member, said outer edge portion having an outside diameter less than the outside diameter of said inner flange portion and less than the inside diameter of said second end of said generally elbow-shaped pipe for receiving said outer edge portion of said inner end of said nozzle within said second end of said pipe in a slip fit relation for attachment of said nozzle and pipe together.