Patent ID: 6089303
Filing Date: 2000-07-18
Classification: E06B,Y10T

Abstract:
A drive system for imparting a rotational drive to a rotatable shaft in a control system for a covering for an architectural opening, said drive system comprising in combination,an elongated hollow shell with an interior wall having a substantially helical guide surface surrounding a longitudinal axis of the shell,an elongated rod of substantially uniform cross-sectional configuration, anda guide unit secured to said rod, said guide unit being at least partially disposed within said shell and movable along said longitudinal axis, said guide comprising a collar unit having an external wall including a follower system for operatively engaging said guide surface in the hollow shell, such that movement of said guide unit along said axis effects relative rotational movement between said shell and said elongated rod,wherein one of said shell and elongated rod is adapted to be operatively connected to said rotatable shaft for unitary rotation therewith to impart rotational movement to said shaft upon movement of said guide unit along said axis.