Patent ID: 6343840
Filing Date: 2002-02-05
Classification: A47C

Abstract:
An adjustment mechanism mounted on a chair for releasably locking one chair component in any one of a plurality of positions relative to a seat of said chair, said adjustment mechanism comprising:a tube-like brace having one end secured to underside of said seat, a transverse elongate groove, and a plurality of transverse disposed apertures; a sliding member slideable in said brace with an upper end secured to one chair component; a guide member coupled to a lower end of said sliding member having a longitudinal slot; a hook member having a lower end flexibly coupled to said longitudinal slot of said guide member and an upper bent end; a first half-cylindrical member in said brace including an inner space for receiving said sliding member and said hook member, a plurality of alternate recesses and risers on either side, an internal notched member having a plurality of curved members and a longitudinal channel in communication with said curved members; a second half-cylindrical member in said brace including a plurality of alternate recesses and risers matingly snapped to said alternate risers and recesses of said first half-cylindrical member respectively for securing said half-cylindrical members together, two latches in lower and upper openings respectively for frictionally locking said sliding member, an upper hole, a lower hole, and a spring-depressible detent in said lower hole; and a lock pin inserted through said transverse elongate groove and said upper hole to secure said brace and said second half-cylindrical member together; wherein one chair component is operative to push down to cause said bent end to move through said channel and pull up to lock in one of said curved members.