ADJUSTABLE OLEOPNEUMATIC AMORTIZED SUPPORT COLUMN, FOR CHAIRS AND ARMCHAIRS

摘要

A chair oleopneumatic adjustable and amortized column support comprising: - a first empty cylindric body (A), the base of which is rigidly connected to the basis of the chair and - a second cylindric body (B) as an upper coaxial slidable stem inside the first, which upper end is secured under the seat of the chair; - a coaxial bar internal of command movable vertically (8) by command lever under the seat that protracts inside the second and the first body, associated to: - first slidable piston means (5) inside the first body and blocked externally to seal on the second body (B), that form two chambers respectively upper and lower chamber (X-Y), containing oil, with valve means (10) to allow or to prevent the passage of oil by one chamber to the other to the purposes to make possible the height variation by means of the actuation of said command under the seat; characterized in that: - two second floating piston means are provided between said first (A) and second body, one above (6) and one under (4) said first piston means (5) realizing a couple of oil chambers (X-Y), contemporaneously displaceable as an ensemble inside the first body (A), in the moment of the sat, with amortizing effect.