Patent ID: 7306288

Claim:
An adjustable armrest assembly comprising: a support adapted to be fixed to a chair seat; a sleeve slidably mounted around the support and slidable in a slide direction, with the sleeve including a vertical hole slidably receiving the support, with the sleeve further including a receiving space extending in the slide direction and separate and spaced from the vertical hole, with the sleeve being slidable relative to the support to allow adjustment of a level of the sleeve between a highest position and a lowest position; a sleeve positioning structure mounted on the sleeve releasably positioning the sleeve at a desired level relative to the support and operable to allow sliding movement of the sleeve relative to the support for adjusting the level of the sleeve; and an elastic element mounted in the receiving space of the sleeve, with the elastic element including a first end attached to the support and a second end attached to the sleeve, with the elastic element being in greater tension while the sleeve is not in the highest position than while the sleeve is in the highest position with the elastic element biasing the sleeve upward relative to the support.