Semi-cordless unbalanced spring driven blind system and methods for adjusting and making same
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United States of America Patent
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Feb 15, 2005
Grant Date -
Dec 4, 2003
app pub date -
Mar 20, 2003
filing date -
Mar 20, 2002
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention includes an unbalanced horizontal blind with a spring means to provide a lifting or retraction force for the slats of the blinds. A brake means prevents undesired movement of the slats that would otherwise result from the continuous retraction force of the spring means when the slats are set in a desired position. Controls for the release of the brake means and tilting are also provided in an embodiment of a blind of the invention. An embodiment of the invention permits the blind to be operated by a single wand that can be used to either raise the slats or tilt the slats. This eliminates the need for a loose cord or bead chain that would traditionally be used as the user interface for controlling the movement of the slats of the blind.
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