Patent ID: 8425109

Claim:
A device for preventing freeze over of a fishing hole cut through a layer of ice overlying a body of water, comprising: a) a housing; b) an electric motor and battery; c) at least one water inlet in the housing; d) at least one water outlet in the housing; and e) at least one water-moving element driven by the motor and moving water out of the at least one water outlet; wherein the housing comprises a single cylindrical element and internal components comprising the motor, the battery, the water moving element, the at least one water outlet and the at least one water inlet that are all surrounded by the single cylindrical element and a shaft connecting the motor to a propeller are entirely within the housing and the housing and internal components are constructed to float and move within the fishing hole wherein the housing and the internal components within the housing are constructed so that upon movement of water through the water outlet, the entire housing and internal components rotate and freely move within the fishing hole.