Abstract: A tooth cleaning device for the disabled eliminates the need for the user to rotate her/his wrist while brushing teeth, and provides approximately the same profile as a standard manual toothbrush. The device is capable of effectively brushing all three sides of all upper or lower teeth simultaneously, and utilizes a commercially available battery powered toothbrush power source to provide the power necessary for effective teeth cleaning action. An open top U-shaped track has a number of distinct operatively connected brush bristle mounting heads reciprocal and retained within the track, with a number of bristles extending up from each of the heads. A device, such as an opening in a central head, a linkage, and a battery powered oscillating shaft, provide back and forth arcuate reciprocal movement of the heads within the track to provide tooth cleaning by the bristles.

Abstract: A tooth cleaning device for the disabled eliminates the need for the user to rotate her/his wrist while brushing teeth, and provides approximately the same profile as a standard manual toothbrush. The device is capable of effectively brushing all three sides of all upper or lower teeth simultaneously, and utilizes a commercially available battery powered toothbrush power source to provide the power necessary for effective teeth cleaning action. An open top U-shaped track has a number of distinct operatively connected brush bristle mounting heads reciprocal and retained within the track, with a number of bristles extending up from each of the heads. A device, such as an opening in a central head, a linkage, and a battery powered oscillating shaft, provide back and forth arcuate reciprocal movement of the heads within the track to provide tooth cleaning by the bristles.

Abstract: A vertically collapsible vertical axis wind turbine may be used on land, or on a watercraft (e.g. a multihull such as a catamaran). The turbine may include a substantially vertical shaft; at least two vane supports mounted by the shaft; and at least two vertically collapsible material vanes supported by the vane supports, so that the vanes are movable from a first operative position in which the vane material is substantially taut, to a second inoperative position in which the vane material collapses. The vane supports are positioned, and the vanes are constructed, so that the wind turbine preferably has a Savonius or an open helix configuration. When used on multihull watercraft a propulsion mechanism is mounted between two of the hulls, and there is an operative connection between the wind turbine shaft and the propulsion mechanism. The operative connection may be a flexible shaft having at least about a 70 (e.g. about 90) degree bend therein.