Patent ID: 8011886

Claim:
A lift device for a wind turbine blade, said lift device comprising: a first airfoil comprising a first sidewall and an opposing second sidewall, said lift device configured to be coupled to the wind turbine blade along a leading edge of the wind turbine blade, and to generate lift when airflow is directed across at least one of said first sidewall and said second sidewall, wherein an axial profile of said lift device substantially conforms to an axial profile of a corresponding portion of the wind turbine blade; a second airfoil positioned proximate said first airfoil, said second airfoil having an axial length that is less than an axial length of said first airfoil; and, at least one coupling member for coupling said second airfoil to the wind turbine blade, said at least one coupling member comprising a curved sidewall configured to replenish a boundary layer of air proximate the wind turbine blade when a flow of air is directed across said curved sidewall and the wind turbine blade.