Patent ID: 6305457
Filing Date: 2001-10-23
Classification: E06B

Abstract:
A rolling door drive assembly including:(i) a final drive unit for connection to a door, whereby the door may be rotated by the final drive unit about an axis to open and close the door,(ii) a motor,(iii) drive means between the final drive unit and the motor operatively engaged with the motor,(iv) one or more drive axes about which one or more components of the drive means rotate to transfer drive from the motor to the final drive unit,(v) actuation means to bring the drive means to a first configuration at which the motor is engaged to drive the final drive unit through the drive means and to bring the drive means to a second configuration at which the motor is disengaged from driving the final drive unit, and(vi) resilient means for urging the drive means into one of the configurations,wherein the actuation means includes a cam rotatable about a cam axis separate from the one or more the drive axes, the cam acting to set the desired configuration of drive means.