Submersible, circulation system for relatively small bodies of water such as a small pond

Abstract

A submersible, circulation system for small and shallow bodies of water such as a small pond. The system includes a driving unit with a tubular shell member and a base member and has a submersed motor and pump supported therein. The shell member extends along and about a vertical axis and has upper and lower openings with the base member spaced below and extending across the lower opening to create inlets therebetween. The pump draws water horizontally through the inlets into the unit where a relatively small first portion of the incoming water enters the pump and is driven downwardly and out upwardly directed discharge nozzles. The discharged flow passes through the remaining portion of the incoming flow to induce the larger, remaining portion to move upwardly with it toward the pond surface in a non-turbulent manner to raise the pond surface into a slightly convex mound. Gravity subsequently collapses the mound in a repeating process to create a pattern of substantially laminar, surface waves outwardly to the pond edges, down the pond sides, and back into the driving unit.