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A mechanical sail including a rotatable mast, the mast including a top vane mount and a bottom vane mount, the mounts being spaced from each other on the mast and rotatable therewith, a series of rotatable vanes spaced from and surrounding the mast and supported by and between the mounts, cam operat

A mechanical sail including a rotatable mast, the mast including a top vane mount and a bottom vane mount, the mounts being spaced from each other on the mast and rotatable therewith, a series of rotatable vanes spaced from and surrounding the mast and supported by and between the mounts, cam operators extending between the mounts and connected to the vanes for controlling the rotation of the vanes, a first controller associated with the mast below the bottom vane mount for controlling the cam operators, the first controller being movable vertically with respect to the mast, a second controller for moving the first controller vertically with respect to the mast, the vanes being flexible and bowed outwardly, the bottom vane mount being movable with respect to the mast and connected to the second controller whereby when the second controller is operated, the bottom vane mount will move toward the top vane mount causing the vanes to bow outwardly at a desired arc and whereby when the first controller is moved, the vanes are caused to rotate to the desired angle of attack with respect to wind velocity and direction. When the sail is connected to a motor drive, the vessel may be driven forward or rearward depending on the angle of attack of the vanes through 180°.

대표청구항 ▼

A mechanical sail including: (a) a mast including a rotatably drive shaft and a nonrotatable sleeve surrounding said drive shaft, (b) a top vane mount and a bottom vane mount rotatably connected to said mast, (c) said mounts spaced from each other on said mast, (d) a series of rotatable vanes spaced

A mechanical sail including: (a) a mast including a rotatably drive shaft and a nonrotatable sleeve surrounding said drive shaft, (b) a top vane mount and a bottom vane mount rotatably connected to said mast, (c) said mounts spaced from each other on said mast, (d) a series of rotatable vanes spaced from and surrounding said mast and supported by and between said mounts, (e) means extending between said mounts and connected to said vanes for controlling the rotation of said vanes including cam means, (f) first piston operator means for said cam means associated with said mast below said bottom vane mount, (g) said first piston operator means being movable vertically with respect to said mast, (h) second piston operator means for moving said first piston operator means vertically with respect to said mast, (i) said vanes being flexible and bowed outwardly, (j) said bottom vane mount being movable vertically with respect to said mast and connected to said second piston operator means, (k) whereby when said second piston operator means is operated, said bottom vane mount will move toward said top vane mount causing said vanes to bow outwardly at a desired arc, and (l) whereby when said first piston operator means is moved, said vanes are caused to rotate to the desired angle of attack with respect to wind velocity and direction.