Abstract: A height adjustable table, preferably with a circular tabletop which includes a vertically telescoping column to support the tabletop and with the column telescoping between extended and retracted positions. A base supports lower end of the column vertically upright. A locking mechanism is provided within the telescoping column adapted to lock the column against telescoping when the tabletop is rotated in one direction relative the base and to unlock the column when rotated in the other direction. When the table is unlocked, a user may adjust the height of the table either by manually lifting alone or assisted by a lifting mechanism to bias the tabletop upwardly and at least partially bear the weight of the tabletop. A stop mechanism is preferably provided to ensure the table is not extended so far as to disengage the tabletop structure. The base of the table is adapted to be engaged by a user's feet to prevent rotation relative to the tabletop when locking or unlocking.

Abstract: A forming process for providing a shaft with splines in that the shaft is provided with splines in such a way that the complete tooth depth is ensured over the entire length to be provided with teeth and any distortions which may occur are minimized in the course of the pressing operation undertaken to provide the teeth. The forming process includes a second force directed against the operational force which is applied to the free end of the toothed shaft.