Patent ID: 6491148
Filing Date: 2002-12-10
Classification: B64C,F16D

Abstract:
An override device comprising a manual control part, an inlet gear part, and an outlet gear part which are mounted to rotate about the same axis, drive means being interposed between the inlet gear part and the outlet gear part so that in normal operation the inlet gear part rotates the outlet gear part, the manual control part also carrying a cam which, in co-operation with complementary means of an intermediate part suitable for following said cam, serves to disengage the drive means interposed between the inlet gear part and the outlet gear part under the effect of torque exerted on the manual control part, the device also having means then enabling the manual control part to drive the outlet gear part, wherein the drive means interposed between the inlet gear part and the outlet gear part comprise a set of friction disks and spring means suitable for exerting a force to compress said disks against one another, and wherein the intermediate part suitable for following the cam carries at least one pusher-forming element which, at the end of a displacement of the intermediate part relative to the cam under drive from torque exerted on the manual control part exerts force opposing that of the spring means and relaxes the friction force on at least some of the disks.