Patent ID: 6193466
Filing Date: 2001-02-27
Classification: B63H

Abstract:
A propelling device comprising:a) a hollow rotatable primary axle having at least one adjustable primary fin radially connected to at least one end of said primary axle,b) a rotatable secondary axle coaxially enclosed within said primary axle and extending from at least one end of said primary axle and having at least one adjustable secondary fin radially connected substantially to at least one end of said secondary axle,c) means for conveying rotational energy to said primary axle and said secondary axle in opposing directions in a timed relationship,d) deploying means to retractably adjust said at least one primary fin and said at least one secondary fin in a the timed relationship into and out of a common thrust sweep zone, wherein said common thrust sweep zone includes a plane perpendicular to said primary and secondary axles with said at least one primary fin and said at least one secondary fin traversing said plane when they are deployed,e) resistance adjusting means to adjust said at least one primary fin and said at least one secondary fin to a state of high resistance when occupying said thrust sweep zone,f) means to support said primary axle, said secondary axle, said means for conveying rotational energy, said fin deploying means, and said fin resistance adjusting means,whereby said at least one primary fin and said at least one secondary fin are adjusted in the timed relationship during rotation to occupy said thrust sweep zone from opposing rotational directions, to maximize resistance while occupying said thrust sweep zone thereby providing thrust, to avoid collision, to exit said thrust sweep zone, and to thereafter assume a mode of relative low resistance.