Retractable window covering having a length expanding stiffening rod
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United States of America Patent
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Dec 15, 2009
Grant Date -
Jan 24, 2008
app pub date -
Jul 17, 2007
filing date -
Jul 21, 2006
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A retractable window covering that has a flexible fabric panel having a bottom edge with a weight bar attached to it. The fabric panel has one or more elongate pockets across its width, accommodating a length-expanding stiffening rod with: an elongate guiding element of non-magnetic material; a first magnet guided for movement along the elongate guiding element; and a second magnet guided for movement along the elongate guiding element and positioned in respect of the first magnet, so that the first and second magnets repulse one another and the guiding element limits and guides the movement of the first and second magnets in respect to one another.
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