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A watercraft for transportation and exercise including a boat having an opening therein for permitting a person to be partially below the waterline and partially above the waterline. A sub-frame is operatively attached to the boat, the sub-frame having a lower position and an upper position. A propu

A watercraft for transportation and exercise including a boat having an opening therein for permitting a person to be partially below the waterline and partially above the waterline. A sub-frame is operatively attached to the boat, the sub-frame having a lower position and an upper position. A propulsion device is operatively attached to the sub-frame for propelling the watercraft forwardly in response to movement of the person's feet, the propulsion device having a foot contact portion. The foot contact portion of the propulsion device being disposed a predetermined distance from the waterline when using the propulsion device in the transportation mode, the foot contact portion of the propulsion device being disposed in the water and a substantial distance below the predetermined distance when the propulsion device is being used in an exercise mode.

대표청구항 ▼

1. A watercraft for transportation and exercise comprising: a boat for floating on water and having a portion thereof above a waterline and a portion thereof below the waterline;an opening in the boat for permitting a person to be partially below the waterline and partially above the waterline;a sub

1. A watercraft for transportation and exercise comprising: a boat for floating on water and having a portion thereof above a waterline and a portion thereof below the waterline;an opening in the boat for permitting a person to be partially below the waterline and partially above the waterline;a sub-frame operatively attached to the boat, the sub-frame having a lower position and an upper position; anda propulsion device operatively attached to the sub-frame for propelling the watercraft forwardly in response to movement of the person's feet, the propulsion device having a foot contact portion, wherein:the foot contact portion of the propulsion device is disposable a predetermined distance from the waterline for use in a transportation mode so that a person can be at least partially above the waterline when using the propulsion device in the transportation mode, said foot contact portion of the propulsion device being disposable in the water a distance below said predetermined distance when the propulsion device is being used in an exercise mode wherein at such time the person's legs are at least partially disposed below the waterline. 2. A watercraft according to claim 1, including means for adjustably moving the propulsion device vertically between the transportation and exercise modes thereof. 3. A watercraft according to claim 2, wherein a seat is operatively attached to the propulsion device whereby the seat moves vertically when the position of the propulsion device is adjusted. 4. A watercraft according to claim 3, including a steering device operatively attached to the boat for controlling the direction of left or right forward movement of the watercraft. 5. A watercraft according to claim 4, wherein the steering device includes a rudder. 6. A watercraft according to claim 1, wherein the propulsion device comprises: a first elongated member operatively pivotally attached to the boat, below the waterline in use of the watercraft, said first elongated member having a first fin disposed toward a rear portion thereof; anda second elongated member operatively pivotally attached to the boat, below the waterline in use of the watercraft, said second elongated member having a second fin disposed toward a rear portion thereof, wherein:a front portion of each of the first and second elongated members is disposed adjacent the person's feet in use of the watercraft, whereby the person can cause the first and second elongated members to selectively pivot up or down. 7. A watercraft according to claim 6, wherein the front portions of the first and second elongated members are operatively attached to a flexible member; and a pulley is operatively attached above the front ends of the elongated members to the boat whereby an intermediate portion of the flexible member is disposed above and is thereby held up by the pulley, whereby pushing downwardly on a front portion of one of the first and second elongated members creates an upward force on a front portion of the other one of the first and second elongated members. 8. A watercraft according to claim 7, comprising a first device operatively attached to the front portion of the first elongated member for receiving one of the person's feet; and a second device operatively attached to the front portion of the second elongated member for receiving the other one of the person's feet, whereby an up and down pumping motion by the person will cause simultaneous and opposite pivoting of the first and second elongated members thereby causing the fins on the rear of the first and second elongated members to propel the watercraft forwardly. 9. A watercraft according to claim 1, including means for locking the propulsion device in either the transportation or exercise mode thereof. 10. A watercraft according to claim 9, wherein the propulsion device has a plurality of vertical positions between the transportation and exercise modes thereof and the locking means can be used in any of such positions. 11. A watercraft according to claim 1, including a sailing mast operatively attached to a brace member. 12. A watercraft according to claim 11, wherein the sailing mast includes means for moving it between an out of the way position when it is not in use and another vertically disposed operative position thereof. 13. A watercraft according to claim 1, wherein the foot contact portion comprises pedals operatively rotatably attached to the sub-frame. 14. A watercraft according to claim 13, including a means for raising and lowering the sub-frame between the lower position and the upper position. 15. A watercraft according to claim 14, including a clutch operatively attached to the pedals and to the sub-frame for selectively actuating the raising and lowering means. 16. A watercraft according to claim 15, wherein the raising and lowering means is a winch selectively operated by the pedals. 17. A watercraft according to claim 16, including a ratchet gear operatively attached to the winch and a pall operatively attached to the sub-frame and spring biased to one position against the ratchet gear for permitting rotation of the winch in one direction without intervention and permitting rotation of the winch in an opposite direction when the pall is moved to a second position thereof.