| 摘要 |
1. Gas spring comprising a housing (1) closed in a sealed manner and provided with a gas injection valve (3), a guiding sleeve (1) inside which a rod (5) slides, a stuffing-box element (8) compressing, owing to the effect to the pressure of the gas enclosed inside the housing, a seal (12) between the said sleeve and the said rod, characterized in that the said sleeve (4) comprises a skirt (9) inside which the stuffing-box element (8), slides in that the sleeve (4) and the stuffing-box element (8) have shoulders defining between the sleeve and the stuffing-box element a first chamber (10) containing the said seal (12) in contact with the rod (5) and a second chamber (11) filled with lubricant, the said second chamber (11) being in communication with a chamber (13) of the said sleeve (4) inside which there is accommodated a ring (15) inside which the said rod (5) slides with play. |
