Patent ID: 7547067

Claim:
A chair comprising: a seat; a base having legs that extend to the floor; an elongate structure connected to the seat at a first end and to the base at a second end, the base defining a longitudinal axis, and the elongated structure comprising: a pillar assembly connected to the seat at the first end; an outer cover housing a portion of the pillar assembly; a tilt ring engaging in part a lower portion of the outer cover; a base portion connected to the tilt ring and the base; the base portion comprising a bearing assembly and a keyhole delimiter, the keyhole delimiter defining a keyhole that is engaged by a bottom end of the pillar assembly to limit the degrees of tilt permitted; the pillar assembly and the outer cover being tiltable in any direction against the tilt ring to tilt the seat away from an axial orientation with respect to the longitudinal axis of the base when tilting force is applied from the seat, the tilt ring returning the pillar assembly and outer cover to the axial orientation when such tilting force is relieved; and the pillar assembly, the outer cover, and the tilt ring being capable of swiveling at the bearing assembly to rotate the seat about the longitudinal axis.