| 摘要 |
A roller linkage assembly (10) of the type for positively locking a traveling rail member (18). The assembly (10) includes a housing (22). The housing has a passageway (24, 26, 28) therethrough. A plurality of rollers (30, 32, 34) are moveably disposed in the passageway (24, 26, 28). An actuation cylinder (14) has a piston (16) extending outwardly therefrom for movement in the passageway (24). The piston (16) surrounds a first roller (30) for positively moving the same in response to a force applied by the actuation cylinder (14). When the cylinder (14) is energized, the first roller (30) is moved to a locked condition. This forces a second roller (32) to its locked condition. Finally, the force is transmitted to a third roller (34) and the third roller (34) engages a notch (36) in the traveling rail member (18) to prevent movement of the same. When the assembly (10) is in the locked condition, no forces are transmitted from the rail (18) to the piston (16).
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