Patent ID: 8550557

Claim:
A synchronizing mechanism for a correlated movement of a seat and a backrest of an office chair, the mechanism comprising: a base support to be mounted on a chair column; a seat support for supporting a seat of the office chair; a backrest support connected to said base support and pivotable about a transverse axis; said backrest support including an entrainment device in operative connection with said seat support such that, when the backrest carries out a pivoting movement backward, said seat support also performs a movement backward; said seat support having an accommodating opening formed on an underside thereof adapted to a shape of said entrainment device, and said entrainment device being placed in said accommodating opening; an adjusting device functional for modifying a position of said accommodating opening in a longitudinal direction of the chair; and an at least partially non-linear guide path connecting said seat support to said base support and when the backrest carries out the pivoting movement backward, said seat support performs a non-horizontal or not exclusively horizontal movement backward.