Patent ID: 7713014
Filing Date: 2010-05-11
Classification: F16B,F42B

Abstract:
1. An explosive attachment device for mechanical connections of components, internally equipped with an explosive charge, the detonation shock effect of which is strong enough for rupturing a connection forming part of the attachment device for a rapid disconnection, said attachment device comprising: an attachment screw having a head, which extends through and interconnects the components; an explosive attachment element adapted to receive the attachment screw, such that the interconnected components are clamped between the head of the attachment screw and the explosive attachment element; wherein the explosive attachment element comprises a cylinder having a cover which engages one of the interconnected components, and a piston mounted in the cylinder, said piston having a first outer diameter that is substantially the same as an inner diameter of the cylinder, and said piston being arranged inside the cylinder such that there is a substantial space between a top of the piston and a top of the cylinder and between a bottom of the piston and a bottom of the cylinder, whereby in the space between the bottom of the piston and the bottom of the cylinder there is provided a circular row of holes in a wall of the cylinder; the piston also having a rod with a substantially smaller diameter than the inner diameter of the cylinder, the rod extending in parallel to a longitudinal mean axis of the cylinder through the cover, such that the attachment screw can be fixedly mounted in the rod; and an explosive charge located in the cylinder in a space between the piston and the cover, the explosive charge having a firing device which is equipped with a delay mechanism, whereby the attachment device, after a time delay, is exploded in such a manner that the blasting pressure is converted to a pulling stress, which pulls off the head of the attachment screw without splintering a remaining part of the device.