COLUMN UNIT FOR CHAIR
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United States of America Patent
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Issued Date -
May 29, 2014
app pub date -
Apr 25, 2012
filing date -
Apr 29, 2011
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
The present invention relates to a column unit for a chair, wherein the column unit for a chair is compact and can improve durability against lateral forces. The present invention relates to a column unit for a chair, in which the height thereof is controlled by upward and downward movements of a spindle assembly, wherein the column unit comprises: an outer pipe comprising an inclined portion of which the diameter gradually becomes larger as it approaches a front end thereof; an inner pipe which is inserted into the outer pipe to form a space portion between the inclined portion and the inner pipe; and a spindle guide which is inserted into the inner pipe to guide the upward and downward movements of the spindle assembly.
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