Abstract: Disclosed herein are wave energy harnessing devices including a first movable device configured to translate in response to a level change in a water body, a first float gear configured to rotate in in response to translation of the first movable device, a first input shaft rotatably driven by the first float gear in response to rotation of the first float gear, an output shaft restricted to rotation in a first direction, and a pair of one-way clutches coupled to the first input shaft and the output shaft and configured to operatively couple the first input shaft to the output shaft in response to rotation of the first input shaft either in the first direction or in a second direction.