Patent ID: 8851842
Filing Date: 2014-10-07
Classification: B64C,F05D

Abstract:
1. A retractable rotor blade assembly for providing vertical lift to a vehicle, the retractable rotor blade assembly comprising: a rotor hub assembly; a plurality of retractable rotor blades each configured to be extended and retracted relative to the rotor hub assembly; and a retraction reel assembly housed in the rotor hub assembly and configured to retract each of the rotor blades toward the rotor hub assembly, the retraction reel assembly having exterior and interior rotor axles configured to undergo rotation for imparting a torque to the rotor blades, a breaking actuator disposed coaxially between the exterior and interior rotor axles for undergoing rotation and having a plurality of breaking notches located at an exterior surface of the breaking actuator, and real cage formed of a plurality of recoiling spools around which respective ones of retraction cables are configured to be wrapped, each of the recoiling spools having a plurality of breaking pins configured to be guided into the breaking notches during retraction of the rotor blades toward the rotor hub assembly.