Patent ID: 7654215

Claim:
A scuba diving propulsion system comprising a propulsion apparatus for a tank, said propulsion apparatus comprising (a) a bracket; (b) apparatus securing said bracket to said tank; (c) a battery mounted on said bracket; (d) a motive power module mounted on said bracket and including a self-contained electric motor unit including a first housing, a self-contained transmission unit including a second housing, mounted exterior of said first housing, and operatively associated with said motor unit to increase and transmit the torque produced by said motor unit, a self-contained clutch unit including a third housing, mounted exterior of said first and second housings, and operatively associated with said transmission to transmit torque produced by said transmission unit, a propeller shaft operatively associated with said transmission unit and clutch unit to receive torque produced by said transmission unit and to rotate, said shaft including a proximate end operatively associated with said clutch unit, and a distal end, and a propeller mounted on said distal end of said propeller shaft, said clutch disengaging said transmission unit in the event rotation of said propeller and shaft is prevented while said motor unit and transmission unit are producing torque.