Conduit opening device and application for it.

摘要

Device for controlling the opening of a shutter (7) for shutting off a pipeline (8), characterised in that the shutter (7) for shutting off the pipeline (8) is controlled in a first direction by a device using a spring (1) made of an alloy with shaped memory as soon as the temperature rises, and a return spring (2) which actuates the shutter (7) in the opposite direction to the first direction as soon as the temperature drops. <IMAGE>