Patent ID: 8256601

Claim:
Manual control motorized system comprising a mechanical sprung anti-backoff device, capable of fixedly immobilizing or releasing a manual control handwheel ( 4 ) and a motor acting on one and the same rotation shaft, comprising one cylindrical spring ( 7 , 16 ) mounted in or on a cylinder ( 9 , 17 ), said cylinder ( 9 , 17 ) being mounted so as to rotate on the rotation shaft of said motor, and said spring being able to rotate with said cylinder, the turns of the spring being in contact with the inner or outer surface of the cylinder, wherein the ends ( 7 a , 7 b , 16 a , 16 b ) of the spring ( 7 , 16 ) are curved inward or outward, in a plane perpendicular to the axis of the spring, said handwheel ( 4 ) being capable of acting on the curve of one or other of the ends of the spring ( 7 , 16 ) by means of an operating finger ( 6 ) or of a drive cylinder ( 20 ), and the rotation of the spring ( 7 , 16 ) being limited by a stop acting against one or other of the ends ( 7 a , 7 b , 16 A, 16 b ) of the spring.