Patent ID: 7948108

Claim:
A system for converting marine current into electrical energy comprising: a housing comprising an opening that is adjustable between an open position that allows fluid to enter the housing through the opening and a closed position that does not allow fluid to enter the housing through the opening; and a plunger that is configurable between a porous state that allows fluid to pass through the plunger and a non-porous state that does not allow fluid to pass through the plunger, the plunger disposed in the housing, the plunger configured to translate about the housing in a first direction when the opening is in the open position and the plunger is in the non-porous state, the plunger configured to translate about the housing in a second direction opposite the first direction when the opening is in the closed position and the plunger is in the porous state, wherein translation of the plunger in the first direction is used to create electrical energy.