| 主权项 |
1. A spring (1) with fluid (2) comprising:
a containment body (3) having an inner chamber (4); a compressible fluid (2) inserted in the inner chamber (4); a compression unit (8) slidably mounted on the containment body (3) and extending, at least partly, inside the inner chamber (4) for acting on the fluid (2); said compression unit (8) being slidable from an extension position to a compression position along a respective direction of loading (C) and, from the compression position to the extension position along a respective direction of extension (E); a sealing gasket (11) for the fluid (2) interposed between the containment body (3) and the compression unit (8) for preventing escape of the fluid (2) from the inner chamber (4); at least one closed loop (13) surrounding the compression unit (8); the closed loop (13) being positioned, at least during the sliding of the compression unit (8), in contact with the sealing gasket (11) so as to limit the deformation of the sealing gasket (11); said closed loop (13) defining an anti-extrusion ring in relation to the sealing gasket (11); the containment body (3) having a positioning seat (17) in which the sealing gasket (11) and the closed loop (13) are inserted and the positioning seat (17) having a wall (20) opposite to the compression unit (8); said closed loop (13) being in contact with the compression unit (8) along an internal annular extension of the closed loop (13) for operating in interference with the compression unit (8) independently from the pressure of the fluid (2) inserted in the inner chamber (4); characterised in that the closed loop (13) is flexible and has a minimum diameter (DMIN) less than a maximum diameter (DMAX) of a contact portion (16) of the compression unit (8) with the closed loop (13), a gap extending, in a direction perpendicular to the direction of extension (E), from the wall (20) and towards the closed loop (13). |
