Back to results
US 6,089,303 AGranted
Control wand for coverings for architectural openings
AssigneeHunter Douglas International N.V.
InventorsDarrell J. Metcalf, Clyde L. Tichenor, Irwin Ginsburgh
Life of this patent
Estimating the term…
Abstract
A system for reversibly rotating a shaft for operation of the control system in a covering for an architectural opening includes two relatively linearly moveable members at least one of which has a low friction component engaging a helical path on the other so that linear movement of the members causes relative rotation to drive the rotatable shaft of the control system.
Claims10
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, and
- a 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.
1 more element
Dependencies are inferred from the claim text.