| 摘要 |
<p>A fluid pressure operable spring force actuator including a fluid pressure operable assembly connected to a force output member (15) movable in a housing (1) to apply output force from a power spring (10) within the housing (1), subject to applied fluid pressure at fluid input (11) to the actuator to counteract the force of the spring (10), characterised in that said fluid pressure operable assembly and said output member (15) comprise respective parts (13,15) relatively moveable one within the other, and locking means (23) normally constraining said parts (13,15) to move together to apply said output force, and in that release means (29) is provided which is actuable externally of said housing (1) and through said output member (15) to release said locking means (23) so that said parts (13,15) are freed to move relative to one another. The locking means (23) may comprise one or more detent members operable by cam means (25), preferably located within an inner one of said parts (13,15). The release means (29) may comprise a rigid connection to an external lever (49) or a flexible connection such as a wire. <IMAGE></p> |
