Patent ID: 6139103
Filing Date: 2000-10-31
Classification: A47C

Abstract:
A chair control mechanism for use on a chair having a base on which a seat and backrest are supported, the mechanism comprising:a housing supported on the base and presenting opposed front and rear ends;a seat bracket supported on the housing for pivotal movement about a horizontally extending front pivot axis between an upright position and a reclining position, the front pivot axis being located adjacent the front end of the housing;a backrest bracket supported on the housing for pivotal movement about a horizontally extending rear pivot axis between an upright position and a reclining position, the rear pivot axis being located rearward of the front pivot axis relative to the housing the front pivot axis being located on the housing at a height lower than the rear pivot axis;a mechanical linkage connected to the brackets at a position spaced rearward of the rear pivot axis relative to the housing for transmitting pivoting movement between the brackets; anda spring assembly located between the front pivot axis and the rear pivot axis and directly engaging the housing and the backrest bracket for biasing the brackets toward the upright position, said spring assembly engaging the backrest bracket at a point above engagement of the housing.