Patent ID: 8342897

Claim:
A pedal propulsion system for a light weight water craft comprising, a portable support frame removably locatable on a bottom base inside said water craft, a seat adjustably mounted on said support frame for an operator to sit thereon for operating said propulsion system with ease, a low noise and efficient pedal assembly having pedals mounted at two ends of a rotatable crank shaft rotatably mounted on a vertical support post of said support frame; a drive sprocket mounted on said rotatable crank shaft of said pedal assembly and being rotatable by operating said pedals; a transfer sprocket mounted to a front end of an elongated rotary rod; and rotational axes of said drive sprocket and said transfer sprocket being oriented at a 90 degree angle relative to one another, and a synchronous drive belt looped and engaged with said drive sprocket and said transfer sprocket in a partially twisted manner, said rotary rod being rotatably located in a protective outer tube with a front end of said outer tube mounted to an access opening located at a lower portion of said vertical support post, said rotary rod being movable slidably in a back and forth manner relative to said protective outer tube, and said elongated rotary rod together with said outer protective tube having a rear end extending towards a rear end of said water craft, an elongated flexible transmission cable having an elongated flexible cable rotatably located within a flexible outer jacket and, a rear end of said protective outer tube of said rotary rod being removably connected to a front end of said protective jacket of said transmission cable, and said cable having a front end removably engageable with a rear end of said rotary rod, a propeller drive assembly removably mountable at a rear end of said water craft, said propeller drive assembly having an upper drive unit with an upper sprocket mounted on a support shaft rotatably mounted in said upper drive unit, said support shaft having a front end removably engageable with a rear end portion of said flexible cable, a lower sprocket rotatably mounted on a propeller drive shaft mounted in said lower drive unit, a propeller drive belt looped and engaged with said upper sprocket and said lower sprocket, and a propeller mounted at a rear end of said propeller drive shaft.