Patent ID: 6015187
Filing Date: 2000-01-18
Classification: A47C

Abstract:
In a chair having a base, a seat assembly and a tilt control mechanism which is supported on said base and permits rearward tilting of said seat assembly, said tilt control mechanism including first and second members wherein one of said first and second members is movable relative to the other of said first and second members during rearward tilting of said seat assembly, said tilt control mechanism further including a biasing arrangement which defines a biasing force that resists relative movement between said first and second members to resist rearward tilting of said seat assembly, and an adjustment mechanism for adjusting said biasing force, comprising the improvement wherein said adjustment mechanism includes a pair of angled guide surfaces which are laterally spaced apart in opposing relation and converge in a direction extending away from said biasing arrangement, said adjustment mechanism further including an actuator and a first block which is movable toward and away from said biasing arrangement along a first path to adjust said biasing arrangement during movement of said first block, said first block including opposite first and second side surfaces which face in opposite sideward directions and converge toward each other, said first and second side surfaces being in slidable contact with said angled guide surfaces respectively and one of said angled guide surfaces being movable sidewardly by said actuator toward said first block along a second path to press said first block between said angled guide surfaces to effect movement of said first block along said first path.