Patent ID: 6165029
Filing Date: 2000-12-26
Classification: B63H

Abstract:
A pedal boat comprising a hull including a lower rear portion, said hull equipped with a propeller and a transmission mechanism for rotating said propeller for propelling said pedal boat and a steering mechanism for controlling direction in which said pedal boat moves; a tubular member having a forward facing opening and a reduced rear end portion disposed below said rear portion of said hull and said lower rear portion of said hull defining a concavely curved surface facing said forward facing opening of said tubular member and forming a flow guiding surface for guiding water near a bottom of said hull into said tubular member; said tubular member having a length greater than it's diameter; and a bearing support mounted on said flow-guiding surface inside said hull for a bearing. and a water tight washer mounted thereto; andsaid transmission mechanism including a driving chain wheel, a gear box and a propeller located in said tubular member and connected to said gear box via a shaft extending through said bearing support, two pedals being separably connected to two sides of a center of said driving chain wheel for a user to pedal and thereby rotate said driving chain wheel; said gear box including gears for providing a high transmission gear ratio to transmit power generated by said driving chain wheel and rotating said propeller and to cause said propeller to rotate at high speed, said propeller being rotated at high speed being capable of expelling water from said tubular member via a rear end thereof, and water expelled from said tubular member propelling said pedal boat forward; andwherein said steering mechanism comprises a flexible tube connected to said reduced rear end portion of said tubular member, a rotating disk having a steering device connected thereto and upward projected therefrom, a group of pulleys, and a cord wrapped around said rotating disk and passing said group of pulleys with two free ends thereof fixed to two sides of said flexible tube; whereby by rotating said rotating disk by said steering device, said cord is pulled leftward or rightward to swing said flexible tube in different directions for deciding directions in which water is expelled from said tubular member and directions in which said pedal boat moves.