| 摘要 |
A hydraulically-actuatable elevator system wherein the vertically reciprocatable cargo-carrying carrier component is suspended from a lofty superstructure by at least one hydraulically-actuatable elongate piston of the generic casing-plunger type. Forceable introduction of hydraulic fluid into the piston will decrease the piston overall elongate length causing the carrier component to ascend toward the overlying superstructure while controlled withdrawal of hydraulic fluid from the piston will increase the piston overall length allowing the weighty carrier component to descend. Novel control means enable the carrier component to be temporarily stationable at any selected elevation within the piston length range.
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