Patent ID: 7798766
Filing Date: 2010-09-21
Classification: F03B,F03D,F05B,Y02E,Y10S

Abstract:
1. Apparatus for utilizing the force of the wind to drive a rotatable output shaft, said apparatus comprising: a one piece longitudinally extending wind sail having first and second generally identical vane members adjoined at a central channeled portion and extending vertically aligned in an inline manner 180 degrees apart from said central channeled portion; a longitudinally extending rotor shaft; said central channeled portion of said wind sail configured for receiving said rotor shaft for centrally mounting of said wind sail on said rotor shaft; said first and second vane members are identical and adjoined to said central portion configured with each having an arced concave front face and an arced convex rear face; said first and second vane members extending from said central portion in inverse relationship such that when said first vane member presents a concave front face on one side of said rotor shaft said second vane member presents a convex face on the other side of said rotor shaft; each said vane member having a top, bottom and an outer edge terminating in a ridge extending outwardly from said concave face for causing greater wind force concentration against said concave face; and wherein said wind sail has a generally S-shaped cross-wise cross section.