Patent ID: 9469399
Filing Date: 2016-10-18
CPC Classification: B64C

Claim Text:
1. A separable blade attachment for a bearingless rotor of a helicopter, comprising: an airfoil blade with a tip end and a root end forming opposite ends thereof; a flexbeam with an attachment end, the flexbeam being flexible; a torsion stiff and lead lag stiff control cuff enclosing at least a predominant portion of the flexbeam; a separable junction arrangement between the attachment end of the flexbeam, the control cuff and the root end of the airfoil blade, wherein the junction arrangement is mechanical between the attachment end of the flexbeam, the control cuff, and the root end of the airfoil blade, with removable fasteners respectively removably connecting the root end of the airfoil blade and the control cuff with the attachment end of the flexbeam, the removable fasteners comprising at least one bolt and wherein a stiffened link is provided between respective trailing edges of the control cuff and the airfoil blade, the stiffened link being mounted to the respective trailing edges of the control cuff and the airfoil blade by the removable fasteners and the stiffened link being push-pull stiff with regard to loads aligned with the trailing edge.