A jet pump

A jet pump for use in a piping system having a static liquid head comprising

• a. a one-piece elongated sleeve adapted to be connected into the piping system and providing intermediate its ends an internal shoulder,
• b. a discharge tube carried within said sleeve and having a diameter less than said sleeve to form a fluid passage therebetween,
• c. a venturi within said sleeve and connected at one end to said discharge tube and blocking said passage between said sleeve and said tube,
• d. said venturi providing adjacent its opposite end an annular shoulder bearing against one side of said internal shoulder within said sleeve,
• e. a restricted throat formed internally of said venturi by first converging and then diverging frustoconically shaped bores,
• f. a nozzle within said sleeve and providing a cone-shaped exhaust positioned within and in spaced relation to said converging frustoconically shaped bore of said venturi and terminating adjacent one side of said restricted throat,
• g. said nozzle providing an annular flange bearing against the opposite side of said internal shoulder within said sleeve so as to space said nozzle from said venturi,
• h. a fluid pressure chamber formed beneath said internal shoulder and between confronting portions of said venturi and said nozzle,
• i. a plurality of curved channels formed throughout the periphery of said venturi extending uniformly from said fluid passage to said fluid pressure chamber so as to provide restricted communication therebetween, and
• j. a radially extending deflector flange provided by said nozzle adjacent to its bearing contact with said internal shoulder of said sleeve and having an annular groove facing said fluid pressure chamber to reverse the direction of flow of the fluid from said channels over said cone-shaped exhaust of said nozzle and into said venturi and through said restricted throat with sufficient pressure to create a vacuum in said discharge tube.