LOCKABLE ELEVATING MECHANISM FOR THE CONTINUOUS ADJUSTMENT OF CHAIR SEATS

摘要

In a lockable elevating mechanism for the continuous adjustment of chair seats a guide tube is provided, to the bottom plate of which is secured a piston rod of a longitudinally adjustable gas spring. The guide tube is provided with an additional tube, which can be exited telescopically and and which is guided in a guide bush arrested in the guide tube. The housing of the gas spring is in turn guided in a guide bush arrested in the additional tube. A mechanical spring is provided between the guide tube and the additional tube and acts upon the additional tube in a direction out of the guide tube.