Patent ID: 7316090

Claim:
A replaceable filling tank for a defensive apparatus, said filling tank having a sleeve, which holds a liquid active defensive substance usable against a personal aggressor, said sleeve having a storage space filled with the active defensive substance and, a fireable propellant charge to force out the filling, said storage space having a storage space end area; a closure element at the storage space end area, and a piston; the storage space being closed in a sealed manner toward the propellant charge by said piston; said filling tank having a rest and a limit position for said piston, the limit position being in the storage space end area; said piston being driveable towards the closure element from said rest position to said limit position by a propellant gas from the fired propellant charge to force out the active defensive substance by firing the propellant charge, said closure element being designed to be opened by a build up of pressure during firing of the propellant charge in an analogous manner to a bursting disk and being designed to be held or positioned firmly after being opened.