Cordless shade
AssigneeComfortex Corporation
InventorsDavid Todd, Robert F. White, Jr., Matthew K. Sleasman
Life of this patent
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AssigneeComfortex Corporation
InventorsDavid Todd, Robert F. White, Jr., Matthew K. Sleasman
Estimating the term…
A cordless drive mechanism for use in a top rail of a shade having inherent spring characteristics. The drive mechanism includes a constant torque spring assembly, at least two tape spool assemblies, and a brake/clutch mechanism, all interconnected via a shaft. The shaft is driven by at least one spring assembly to drive the tape spool assembly, which retracts a bottom rail of the shade by acting as a reel upon which tape is wound. The brake/clutch assembly locks the shade into a position desired by the user, and applies a braking force to the shaft when the shade is retracting, forcing a virtually constant retraction speed. The constant torque spring assembly is modular, constructed of identical housing pieces, a spring take-up spool and a rolled constant torque spring. More spring assemblies may be added to the drive mechanism for larger and heavier shades. The tape spool assembly includes a tape guide retainer fitted with an angled tape retention wall which prevents slack tape from accumulating with the top rail.
In a roller type retraction system adapted for use in driving a shade having inherent spring properties tending to retract the shade to a stowed position from a deployed position, a spool assembly including a rotatably mounted spool having its rotational axis oriented parallel to the plane of the deployed shade and having a perimeter from which a shade supporting tape is unwound during shade deployment and onto which it is rewound during shade retraction, and a tape access aperture through which the tape passes during winding and unwinding, the spool being positioned relative to the tape access aperture such that the tape extends in a substantially vertical path from said tape access aperture to its point of tangency with the spool perimeter, an improved tape guiding means which comprises:
In a cordless roller type shade retraction system for a shade having inherent spring properties tending to retract the shade to a stored position from a deployed position, and having a head rail assembly including a rotatable shaft and spool assembly on which a shade-retracting tape is wound, an improved shaft-rotating drive means for causing said shaft and spool assembly to wind up the tape, comprising:
Dependencies are inferred from the claim text.