| 摘要 |
<p>A pneumatic spring having a cylinder (12) piston and piston rod (16) biased toward extended condition by compressed gas in the cylinder (12), an elongated cover tube (20) severed at one of its end (20′) to the outer end (16′) of the rod (16), extending over the length of the rod (16) to define an annular space (29) therebetween, and always in axial alignment with and extending over positons of the cylinder (12). A transversely shiftable plunger lock assembly on the cover tube (20) near its open end includes a fixed body (26) and a lock plunger (28) movable transversely of the piston axis into the annular space (29) when the rod (16) and cylinder (12) are extended, to abut the annular end (12′) of the cylinder (12) to securely retain the assembly in one position, preferably a substantially extended condition. </p> |
