Abstract: An ergonomic chair having an extending foot and the possibility of swiveling with tilting of the chair backrest synchronized with horizontal movement of the chair seat. It is intended for the linkage system to be installed on a swivel chair. With this (office) chair, it is intended to synchronize the tilt of the backrest with the forward movement of the seat in such a way that the distance of the seat occupant's hands relative to the work equipment on the desk top remains virtually constant at all times.

Abstract: A movable armrest is provided which has a floor support, a support element extending upwardly from the floor support, and a trough-shaped armrest member attached to a top end of the support element, the support element being arranged to move the armrest member horizontally relative to the floor support. The support element may be a rigid rod with at least one spring positioned between the rod and the floor support, or may be an elongated spring, such as a torsion spring, a coil spring, a flat spring or a spiral spring. The support element may have a telescoping feature to permit it to be collapsed for storage and a rotatable joint may be provided between the armrest member and the support element.

Abstract: A movable armrest is provided which has a floor support, a support element extending upwardly from the floor support, and a trough-shaped armrest member attached to a top end of the support element, the support element being arranged to move the armrest member horizontally relative to the floor support. The support element may be a rigid rod with at least one spring positioned between the rod and the floor support, or may be an elongated spring, such as a torsion spring, a coil spring, a flat spring or a spiral spring. The support element may have a telescoping feature to permit it to be collapsed for storage and a rotatable joint may be provided between the armrest member and the support element.