CONTROL UNIT FOR LIFT SYSTEM FOR COVERINGS FOR ARCHITECTURAL OPENINGS
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United States of America Patent
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Issued Date -
N/A
app pub date -
Jan 16, 2009
filing date -
Nov 14, 2007
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A control unit for controlling a lift system in a covering for an architectural opening includes a drive assembly and a brake assembly. The drive assembly includes a spool about which a pull cord can be wrapped or unwrapped and a spring for biasing the spool in a direction to wrap the pull cord thereabout. A drive gear is operatively associated with the spool so that upon a pulling of the pull cord and unwrapping of the cord from the spool, the drive gear is shifted axially into engagement with a driven gear in the brake assembly. The driven gear under such circumstances rotates a driven shaft, which in turn rotates a lift shaft in the covering to raise the covering from an extended position to a retracted position.
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