Apparatus for braking a member, particularly an opening ventilator flap biased to one of two positions

摘要

To prevent excessively fast movement of a member such as an opening ventilation flap moving in response to a bias force such as that from gas springs an electromagnetic clutch 36 driven by the member has a capacitor 50 connected across it to discharge into the clutch and apply a restraining torque, such that the clutch can act as a brake on the member.