Patent ID: 8398172

Claim:
A locking chair adjustment mechanism for adjusting a position of a chair component, said mechanism comprising: a central shaft; a spiral jaw clutch comprising two interconnecting spiral jaw interfaces wherein a first one of said spiral jaw interfaces is fixedly mounted on a rotatable adjustment handle; a slotted element wherein a slot is formed in the slotted element, the slot being sized to slideably receive said central shaft therein for displacement of said slotted element when the mechanism is in an unlocked position; a locking pad for locking the mechanism against said slotted element; a spring mechanism attached to said locking pad; a rotatable adjustment handle to toggle the adjustment mechanism from a locked position to an unlocked position by rotating said first one of said spiral jaw interfaces in order to produce a displacement of said spring mechanism to release pressure on said locking pad, wherein the chair component is mounted on said slotted element and the position of the component is adjusted through displacement of the central shaft within the slot formed in the slotted element, and wherein said spring mechanism urges said adjustment mechanism towards the locked position when said adjustment mechanism is in the unlocked position.