US Patent 7174941 One-way drive for window coverings

An actuation system for use with an adjustable covering for a fenestration product. The actuation system coupled to an operator for controlling adjustment of extension and contraction of the covering. The actuation system including at least one lift mechanism configured to decouple the actuation system from the operator during a potentially damaging event, such as slack in a lift cord during extension of the covering. The lift mechanism later recoupling the actuation system and operator while maintaining rotational registration between multiple lift mechanisms of the actuation system.