Adjustment device of a chair backrest
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Dec 9, 2003
Grant Date -
Aug 7, 2003
app pub date -
Feb 1, 2002
filing date -
Feb 1, 2002
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An adjustment device of a chair backrest includes a fixed member a movable member and a fixing spanner. The fixed member is fixed to a bottom of a seat of a chair. The movable member is pivoted to the fixed member, and a support rod of the backrest is connected to a rear end of the movable member. The fixing spanner is connected to an outer end of a bolt passing through both a lateral curved slot of the fixed member and a round hole of the movable member from a connecting end portion thereof so as to be turnable between an unlocking position for allowing adjustment of the backrest and a locking position for fixing the movable member after the adjustment. The fixed member further has a curved bump enclosing the curved slot. The bump has a tapering lateral side with an upper portion bigger than a lower portion thereof, whereby the backrest can be further secured in position after the adjustment.
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Family
International Classification(s)
Cited Art Landscape
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