초록 ▼

A watercraft has floats supporting a bicycle-type frame having handlebars connected to a rudder to steer the watercraft. Side boards located on opposite sides of the frame are mounted on cross bars which support the frame on the floats. A chain and sprocket foot operated drive is connected to a shaf

A watercraft has floats supporting a bicycle-type frame having handlebars connected to a rudder to steer the watercraft. Side boards located on opposite sides of the frame are mounted on cross bars which support the frame on the floats. A chain and sprocket foot operated drive is connected to a shaft journaled to a housing accommodating a power transmission for rotating a propeller. A chain guard is located on opposite sides of the chain connecting the shaft and foot operated drive. The housing is movable between a down location wherein the chain is retained in a tension condition to an up location wherein the chain is in a loose condition.

대표청구항 ▼

[ We claim:] [1.] A watercraft comprising: a plurality of longitudinal float means for supporting the watercraft on a body of water, transverse members extended between and attached to the float means to retain the float means laterally relative to each other, a frame, means mounting the frame on th

[ We claim:] [1.] A watercraft comprising: a plurality of longitudinal float means for supporting the watercraft on a body of water, transverse members extended between and attached to the float means to retain the float means laterally relative to each other, a frame, means mounting the frame on the transverse members, platforms located on opposite sides of the frame, means mounting the platforms on the transverse members, a rudder for steering the watercraft located below said frame, means mounting the rudder on the frame for movement about a generally upright axis to turn said rudder, a propeller, propeller power transmission means mounted on the frame and drivably connected to the propeller for moving said watercraft on said water, the propeller transmission means includes a generally flat and narrow case, said case having an elongated and narrow internal chamber, and an upper end and a lower end, a power input first shaft rotatably mounted on the upper end of the case, said first shaft having a portion thereof located within the chamber adapted to be rotated, a first sprocket mounted on the portion of the shaft, a second shaft rotatably mounted on the lower end of the case having a portion thereof located within the chamber, said second shaft being laterally spaced from and generally parallel to the first shaft, a second sprocket mounted on the portion of the second shaft in alignment with the first sprocket, endless link chain means trained about the first and second sprockets whereby rotation of the first shaft results in rotation of the second shaft, a first bevel gear mounted on the portion of the second shaft adjacent the second sprocket, said first bevel gear having a diameter larger than the diameter of the second sprocket and external bevel gear teeth tapering toward the second sprocket, a third shaft rotatably mounted on the lower end of the case for rotation about an axis generally normal to the second shaft and in the same horizontal plane as the axis of rotation of the second shaft, and a second bevel gear mounted on and secured to the third shaft located in longitudinal alignment with the second sprocket and in driving engagement with the first bevel gear whereby rotation of the first shaft causes rotation of the third shaft, and means securing said propeller to the third shaft, and foot operated drive means mounted on the frame operably connected to said propeller transmission means for rotating said propeller thereby moving said watercraft on said body of water.