Patent ID: 9549614
Date: 2017-01-24
CPC Classifications: A47C

Claim:
1. A mechanism for an office chair, the mechanism comprising: a base support configured to be placed on a chair column; a seat support disposed on said base support and configured to be moved relative to said base support; a backrest coupled to said seat support and configured to be disposed on a backrest support, said backrest configured to pivot to effect a movement of said seat support relative to said base support; two track elements disposed symmetrically relative to a center longitudinal plane of said seat support and each being movably connected to said base support at a respective base support connecting point and each being movably connected to said seat support at a respective seat support connecting point, each of said track elements respectively having at least one of a position or a location being altered by pivoting of said backrest; two spring elements acting on said track elements and on said seat support or acting on said backrest or said backrest support, said spring elements being acted upon by a movement of said seat support relative to said base support; and each of said spring elements having a respective track element point of action on a corresponding one of said tracks elements being variable in position.