초록 ▼

A collapsible wind propelled watercraft adapted for movement over water having a substantially tetrahedral frame comprising three substantially equidistantly spaced support members adapted to engage and be supported on the surface of the water, four substantially rigid spars hingedly connected toget

A collapsible wind propelled watercraft adapted for movement over water having a substantially tetrahedral frame comprising three substantially equidistantly spaced support members adapted to engage and be supported on the surface of the water, four substantially rigid spars hingedly connected together at a juncture and extending radially outwardly therefrom such that three of the spars may articulate about the fourth spar to collapse the frame, the four spars further being separated from each other by equal angles. A plurality of stays are connected between each one of the spars and the other spars at points on the spars substantially equidistant from the juncture so as to form the substantially tetrahedral frame, and three of the spars extend laterally and downwardly from the juncture and have the support members connected near their distal ends. Suspended in the area defined by the three spars and the water surface is a trampoline connected to the distal ends of the three spars extending downwardly. A pair of sails are connected to the tetrahedral frame in such a manner that they are capable of being raised or lowered, and a line arrangement connected to one of the three support members enables the craft to be steered in a desired direction.

대표청구항 ▼

A wind propelled water craft comprising: three spaced apart support members adapted to engage and be supported on the surface of the water, a substantially tetrahedral frame comprising four substantially rigid spars connected together at a juncture and extending radially outwardly therefrom, said sp

A wind propelled water craft comprising: three spaced apart support members adapted to engage and be supported on the surface of the water, a substantially tetrahedral frame comprising four substantially rigid spars connected together at a juncture and extending radially outwardly therefrom, said spars having ends distal from said juncture, and a first plurality of taut, flexible stays connected to and between each one of said spars and the other said spars, respectively, said stays being connected to said spars at points near the distal ends thereof, three of said spars extending laterally and downwardly from said juncture and the fourth one of said spars extending vertically upward from said juncture, said fourth spar lying along a vertical axis, said support members being connected to said tetrahedral frame at points near said distal ends of said three spars, a sail connected to said tetrahedral frame, and a triangularly-shaped trampoline having its three vertices connected near said distal ends of said three spars, and a tensioning means comprising three sleeve members, each said sleeve member being connected to said trampoline near a respective said vertex, and three rigid tube members, each said rigid tube member being received in a respective said sleeve member, each of said rigid tube members having a second plurality of taut, flexible stays connecting its end portions to the said fourth vertical spar.