Patent ID: 8602109

Claim:
A water submerged device for generating a force under water, the device comprising: a low pressure recipient configured to contain a volume of a first fluid at a low pressure; an external enclosure containing a second fluid, the external enclosure having a chamber capable of containing water and having a pipe connecting the chamber to the water; a first valve attached to the pipe having an open and a closed position, the first valve allowing fluid communication between the chamber and the water when in the open position, and sealing the chamber from the water when in the closed position; an accumulator fluidly attached to the external enclosure and configured to provide a supplemental pressure to the enclosure; an inlet connected to the low pressure recipient and configured to exchange the second fluid with the external enclosure; and a second valve connected to the external enclosure and the inlet and configured to separate a pressure source in the external enclosure from the low pressure recipient, wherein when the second valve is open, such that there is a flow communication between the external enclosure and the low pressure recipient, a pressure imbalance occurs in the external enclosure which generates the force and the second fluid from the external enclosure enters the low pressure recipient and compresses the first fluid.