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US 8,025,089 B2Granted
Mechanism for untangling window cords
AssigneeRollease, Inc.
InventorsGeorge Chelednik, Joe Zakowski, Amnouy Athitang
Life of this patent
Estimating the term…
Abstract
A lifting system for a window covering has a movable shaft disposed within a cradle that is held within a head rail. The movable shaft has an end portion and a lift cord wrapping portion. A lift cord is connected to the movable shaft. A transition member is disposed between the end portion and the lift cord wrapping portion. The transition member acts as a ramp to facilitate migration of the lift cord to the lift cord wrapping portion once bird nesting has occurred.
Claims27
A lifting system for a window covering comprising:
- a cradle;
- a drive shaft;
- a movable shaft disposed on said drive shaft and supported by said cradle, said movable shaft axially movable with respect to said drive shaft and movable axially and rotatably with respect to said cradle;
- said movable shaft defining a lift cord wrapping portion, an end portion, and a transition member extending between said lift cord wrapping portion and said end portion;
- a lift cord connected to said movable shaft such that raising of said window covering causes said lift cord to at least partially wrap around said lift cord wrapping portion of said movable shaft and lowering of said window covering causes said lift cord to at least partially unwrap from said lift cord wrapping portion of said movable shaft;
- wherein said lift cord is connected to said movable shaft to enable said transition member to facilitate migration of said lift cord from said drive shaft back to said lift cord wrapping portion of said movable shaft in order to untangle said lift cord after bird nesting as said window covering is raised or lowered.
3 more elements
A lifting system for a window covering comprising:
- a cradle;
- a drive shaft;
- a movable shaft disposed on said drive shaft and supported by said cradle, said movable shaft axially movable with respect to said drive shaft and movable axially and rotatably with respect to said cradle;
- said movable shaft defining a cylindrical lift cord wrapping portion, a cylindrical end portion, and a transition member having a first end adjacent said cylindrical lift cord wrapping portion and having a smaller second end adjacent said cylindrical end portion;
- a lift cord connected to said movable shaft such that raising of said window covering causes said lift cord to at least partially wrap around said lift cord wrapping portion of said movable shaft and lowering of said window covering causes said lift cord to at least partially unwrap from said lift cord wrapping portion of said movable shaft;
- wherein said lift cord is connected to said movable shaft to enable said transition member to facilitate migration of said lift cord from said drive shaft back to said cylindrical lift cord wrapping portion of said movable shaft in order to untangle said lift cord after bird nesting as said window covering is raised or lowered.
3 more elements
Dependencies are inferred from the claim text.