Patent ID: 6976739

Claim:
An armrest assembly comprising: a stationary tube for attachment to a chair, the stationary tube comprising recesses in an internal face; a movable tube inserted in the stationary tube, the movable tube defining an aperture; an armrest installed on the movable tube; a detent for insertion into one of the recesses of the stationary tube through the aperture of the movable tube; a rod put in the movable tube, the rod defining a recess for receiving the detent, the recess of the rod comprising a shallow portion and a deep portion; and a lever connected with the rod and installed on the armrest in order to move the rod so as to control the detent, wherein the armrest defines an aperture, wherein the lever defines an aperture aligned with the aperture of the armrest, wherein the rod is inserted in the movable tube through the aperture of the lever and the aperture of the armrest.