| 摘要 |
A gas spring apparatus (10) comprises an outer tube (11), a cylinder (12) held in the outer tube (11), and a rod (13) having a piston (30) located in the cylinder (12). The rod (13) is inserted into the cylinder (12) through a sealing portion (25). The interior of the cylinder (12) is divided in two, a first liquid chamber (31) situated on the side of the sealing portion (25) and a low-pressure gas chamber (32) situated on the side remoter from the sealing portion (25), by means of the piston (30). A space (S) between the inner surface of the outer tube (11) and the outer surface of the cylinder (12) is divided between a high-pressure gas chamber (41) and a second liquid chamber (42) by means of a metal bellows (45). A first liquid chamber (31) and a second liquid chamber (42) communicate with each other by means of liquid communicating portions (50). A gas is charged in the high-pressure gas chamber (41) at a higher pressure than in the low-pressure gas chamber (32). <IMAGE> |
