Leak-Sealing Device and Method and System for Sealing a Leak

A leak-sealing device for sealing a leak in a container, tank and/or pipe comprising:

• a housing-like carrier unit,
• at least one expandable leak-sealing means, which is provided at one end region of the carrier unit, is not expanded or expanded only slightly in its storage position, and
• at least one fluid connection and/or at least one fluid supply unit which is coupled to the carrier unit in such a way that, when fluid is supplied, fluid at least partially fills and expands the leak-sealing means with the fluid in its sealing position,
• wherein a piston unit mounted for longitudinal movement is provided in the carrier unit, and the leak-sealing means is coupled to the piston unit and/or the carrier unit and the at least one fluid connection and/or the at least one fluid supply unit in such a way that, when fluid is supplied, the fluid advances the piston unit into the sealing position and at least partially fills the leak-sealing means via a fluid supply line.