Bi-fold door lift apparatus
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Mar 13, 2001
Grant Date -
N/A
app pub date -
May 19, 1999
filing date -
May 19, 1999
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A bi-fold door is equipped with door lifting devices operated with an electric motor drive to selectively open and close the door. The door lifting devices have winches operable to wind and unwind elongated webs connected at one end to rotatable members of the winches and anchored at the opposite end to the door. Anchors mounted on the door have adjustable sleeves operable to adjust the working lengths of the webs.
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Family
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