| 摘要 |
<p>An adjustable pillar, e.g. a gas spring (1), comprising an at least partially medium-filled cylindrical encasing, within which at least two chambers, separated by a partitition, are located. A piston (4), which is axially movable in a sealing manner, is present within said encasing. A piston rod (5) extends outside the encasing and is movable in a sealing manner with respect thereto. A passage (9,10) is provided through said partition, which passage can be closed by a valve (15,16). The valve comprises a valve seat (15) and a valve body (16) co-operating therewith, said valve body being supported on a valve stem (17) extending outside the encasing with one control end and being movable in a sealing manner with respect thereto. The valve seat and the valve body each exhibit rotational symmetry about a common axis and are at least approximately in circular line contact in the closed condition of the valve. Either one of said valve seat and said valve body has an elastically deformable coating. <IMAGE></p> |
