Hollow built-in blind
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United States of America Patent
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Sep 1, 2015
Grant Date -
Jul 31, 2014
app pub date -
Nov 15, 2013
filing date -
May 22, 2009
priority date (Note) -
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status (Latency Note)
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Abstract
A hollow built-in blind includes two glass plates, an annular spacer cooperating with the glass plates to define a receiving space, and a blind disposed in the receiving space and including a lower rail, a plurality of slats, and two pull cords connected to the lower rail. A transmission unit includes a transmission shaft, a winding mechanism disposed on the shaft, and a belt pulley fixed to one end of the shaft. A drive unit is located at one lateral end of the blind and includes a guide wheel spaced apart from the belt pulley, an internal control device operable to move upward and downward in the receiving space, and a timing belt looped over the belt pulley and the guide wheel and having two opposite ends connected to the internal control device to form a closed loop.
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