Patent ID: 7114456
Filing Date: 2006-10-03
Classification: B63H

Abstract:
1. A wing sail for use with a wind-powered vehicle, said sail comprising: (a) a rotable mast, said mast having a longitudinally extending mast axis, (b) a plurality of ribs each pivotally couplable with said mast for pivotal movement about an associated rib axis extending transversly in relation to said mast axis, and each slidably movable along said mast when so coupled, each of said rib comprising a first side and a second side, wherein: (c) a trimming means for engaging said ribs and operative when said ribs are mounted to said mast for pivotally moving said ribs about their associated rib axis between neutral and asymmetrical pivot positions; (d) lifting means for engaging said ribs and operative when said ribs are mounted to said mast for slidably lifting said ribs along said mast from respective lowermost positions to respective upper positions; and, (e) a flexible cover for extending over ribs to provide a sail surface conforming to and supported by said ribs.