US Patent 7938957 Method and apparatus of submersible intake equipment

An apparatus having flotation ballasts, a flotation platform and on the flotation platform, an intake equipment, such as a screen, check valve and/or pump intake and a coupling for a discharge pipe. In an embodiment of the present invention comprises, there are a plurality of substantially symmetrical flotation ballasts, each having a ballast chamber. The composition of the flotation ballast may be made of a material having a density appropriate for the fluid in which it is to be submerged. The method includes the steps of using an apparatus as herein described to ascend and descend intake equipment.