Patent ID: 7374380
Filing Date: 2008-05-20
Classification: E04G,E04H

Abstract:
1. A telescopic column comprising: a cylinder; a post inserted in the cylinder partially, the post comprising a ladder formed thereon; a mount attached to the cylinder; a positioning element installed on the mount pivotally, the positioning element comprising a dent for engagement with the ladder during an attempt to insert the post into the cylinder and for disengagement from the ladder when the post is extended from the cylinder; a gear installed on the mount rotationally; a handle installed on the mount so as to provide pivotal movement in an active direction and in an idle direction opposite to the active direction; and an extending element installed on the handle movably, the extending element comprises a detent for engagement with the gear in the active direction of the pivotal movement of the handle and for disengagement from the gear in the idle direction of the pivotal movement of the handle.