Patent ID: 6619921
Filing Date: 2003-09-16
Classification: F03D,F05B,Y02E

Abstract:
A blade assembly for a windmill comprising:an output shaft; a first cross-shaft operatively mounted relative to said output shaft, said first cross-shaft including a first end and a distal end; a second cross-shaft operatively mounted relative to said output shaft, said second cross-shaft including a first end and a distal end; a first blade being mounted on said first end of said first cross-shaft, said first cross-shaft being rotated by said first blade to impart rotation to said output shaft, a first stop being positioned on said first cross-shaft for limiting the rotation of said first cross-shaft relative to said output shaft; a second blade being mounted on said distal end of said first cross-shaft, said first cross-shaft being rotated by said second blade to impart rotation to said output shaft, a second stop being positioned on said first cross-shaft for limiting the rotation of said first cross-shaft relative to said output shaft; a third blade being mounted on said first end of said second cross-shaft, said second cross-shaft being rotated by said third blade to impart rotation to said output shaft, a third stop being positioned on said second cross-shaft for limiting the rotation of said second cross-shaft relative to said output shaft; and a fourth blade being mounted on said distal end of said second cross-shaft, said second cross-shaft being rotated by said fourth blade to impart rotation to said output shaft, a fourth stop being positioned on said second cross-shaft for limiting the rotation of said second cross-shaft relative to said output shaft; wherein said first blade is driven to impart a predetermined rotation to said output shaft and thereafter said third blade is driven to impart a predetermined rotation to said output shaft and thereafter said second blade is drive to impart a predetermined rotation to said output shaft and thereafter said fourth blade is driven to impart a predetermined rotation to said output shaft for providing continuous rotation to the output shaft.