Patent ID: 7744319

Claim:
A pyromechanical securing element for mechanical connection of two components, said securing element comprising: a generally cylindrical covering, including an expandable head part; a pyrotechnic propellant charge disposed within said head part, which borders on an adapter; and a stop disposed on a rear part of the covering distal said head part for registering with concentric through passages in adjacent first and second components to be interconnected, wherein the covering, at its head part, has frangible break notches running in longitudinal direction operable to tear open the covering in the head region upon ignition of the propellant charge to bend separated head part portions around the adapter, as a result of which the first component is firmly connected to the second component, wherein the adapter defines a groove extending about the outer periphery thereof, the covering defines at least three radially projecting collar portions arranged on the outer surface of the covering and radially projecting collar portions arranged on an inner surface of the covering projecting into the adapter groove to anchor the covering with the adapter, and the radially projecting collar portions arranged on the outer surface are axially aligned and circumferentially alternating with the radially projecting collar portions arranged on the inner surface.