| 摘要 |
PURPOSE: A multiple installation mechanism of propellers is provided to allow a user to drive a boat by stepping on pedals to rotate the propeller. CONSTITUTION: A multiple installation mechanism of propellers comprises a pipe which is installed in the tail part of a pedal boat, a bicycle boat, a general boat, and a ship. Multiple pulleys are connected to the pipe(17), and multiple shafts(18) and propellers(19) are installed to be connected to the pulleys. The power generated by the engine or the pedal is connected to the propellers so that the propellers rotate. |
