System for actuating a gas damper

Gas-filled cylinder, with two concentric cylinders (1, 2) that provide an intermediate gas passage chamber (3), a upper set of valves made of three bodies (7, 8, 9) assembled together, that hold between them an inner ring seal (19) through which the valve shaft (13) passes, with this valve shaft being elongated and protruding to the exterior of the cylinder so that it can be operated from the said exterior, with the inner end of the shaft (13) including a washer (12) which is supported on the upper part (9) of the valve unit (7, 8, 9) with a ring seal (11) received in a slot (24), in that the cylinder includes a lower valve assembly (6) and a cylinder shaft (16) with a piston (18) housed in the inner tube (2) that provides two inner chambers (4, 5), with the gas passing from one to the other through the intermediate space (3) through the through the two valve seals, which is characterised by,

• the valve shaft (13) has a diameter which is smaller than the inner diameter of the component parts (7, 8, 9) of the valve, moving without physical support on these parts, with support being established by the seating itself of the washer (12) on the front of the lower end part (9) holding the ring seal (11) that closes the gas passage in the frontal trunco-conical slot (24) in the said part (9),
• the upper end of the cylinder from which the projection (14) on the valve shaft (13) protrudes, is housed in the interior of a cylindrical boss (30), in which a transversal plate (25) provided with a hole (26) is situated, in order to receive the projection (14), in that the plate protrudes towards the exterior of the boss so that it can be connected to the means of operation of the projection and is provided with lateral movement with open grooves (27) cut in the side surface of the boss.