Patent ID: 6079334
Filing Date: 2000-06-27
Classification: F42B

Abstract:
Shell for trench mortars and similar firing systems, which shell includes an effective portion having an effective charge, which effective portion can be shot out from a barrel by a propellant charge, there being a pressure plate provided between the effective portion and the propellant charge, which pressure plate carries the influence from the propellant charge, a support portion being releasably provided in the firing direction in front of the effective portion, the support portion supporting a second propellant charge and in a front end supports a detonator nose, which, when the shell is fired, is brought to an ignitable position in the front end and is ignited when hitting ground initiating the second propellant charge, the second propellant charge being located between the support portion and the effective portion in such a manner, that when the second propellant charge is detonated the effective portion is shot away from the support portion and the effective charge is simultaneously initiated with delay, the support portion being attached to a metal backing tube supporting the effective portion, which is arranged around the backing tube and is axially movable from the support potion against the influence of a locking force, there being provided inside the backing tube an axially movable piston arrangement, which, in an end where the backing tube is attached to the support portion, has a priming tube with a charge and a detonator, which is pointing out from the support portion, the opposite end of the piston arrangement being arranged to be influenced by a small portion of the pressure from the propellant charge acting on the pressure plate when the shell is fired.