Importance

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Abstract

A device for displacing a plunger (35), movably disposed in a container (23), e.g. a medical multi-chamber ampoule, which has at least one movable partition (29), sealingly isolating at least two substances to be mixed with each other, comprises a holder means (6) for releasable connection to the container (23), a screw actuator (4) engageable with the plunger (37) for displacing it in the container (23), the holder means (6) further having a female thread, engageable with the corresponding male thread of the screw actuator. The female thread is divided into at least two parts, which are movable between a first position, in which the parts of the female thread are not engageable with the screw actuator, and a second position, in which the parts of the female thread are engageable with the actuator. The bolder means (8) has actuating means for moving the female read parts between said first and second positions.

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First Claim