Shape memory alloy-based actuator

Abstract

A shape-memory alloy-based actuator for lifting loads (2), comprising a first cylinder (3) and a second cylinder (4) connected to each other, which in turn have a plurality of shape-memory alloy fibers (9), and means for heating said fibers (9). The first cylinder (3) has a base end (5) for attachment to a fixed surface, and a connecting end (6), and the second cylinder (4) has a hook end (7) for engaging the load (2), and a connecting end (6). The actuator (1) further comprises a displacement and / or variable force multiplier (8) connecting both cylinders (3, 4), for adjusting the final displacement of the actuator (1) or the force exerted by said actuator (1).

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