Self coupling submersible pump

Claim 1

In a pumping plant including in combination a sump for accumulating sewage or the like, vertical guide means fixedly mounted in said sump, a self coupling pumping apparatus comprising: an immersible casing with a pump and motor therein, said pump having an extended outlet nozzle; a base support means slidably connected to said vertical guide means for up and down movement; means pivotally connecting said casing to said base support means so that said casing and said outlet nozzle will tilt relative to said support means and said guide means, said connecting means being located for producing a relatively large thrusting force on said outlet nozzle when said casing is caused to pivot as a result of a relatively small downward force applied to said base support means; stop means for holding said casing in a tilted position; a discharge tube fixedly mounted in said sump and having an extended end portion with a free infeed opening, said pump nozzle being vertically aligned to engage said discharge end portion; the distance from the end of said outlet nozzle to said connecting means being greater than the distance from said outlet discharge end portion to said connecting means when the pump is in its lowermost coupling position, whereby when said immersible casing is lowered into said sump, said pump outlet nozzle engages said discharge end portion and slidably enters therein into a coupling position as said casing continues to lower and simultaneously pivots upwardly from its tilted position.