Patent ID: 7228801
Filing Date: 2007-06-12
Classification: F42B

Abstract:
1. A cylindrical ballistic tracer platform for holding and carrying an integrated inseparable tracer element having a bottom, the tracer platform designed for use with a shotgun shell having a bore, a shot holder and propellant, the tracer platform to be positioned within the shotgun shell to at least substantially fill the portion of the bore between the shot holder and the propellant, the tracer platform having a closed nose to be positioned proximate to the shot holder and a bottom to be positioned proximate to the propellant and a coaxial cavity formed therein, said coaxial cavity being coaxial to said bore and extending from the bottom upwards to a portion of said tracer platform intermediate to the nose and bottom of the tracer platform, the tracer element being disposed away from the shot holder, the tracer element entirely filling said coaxial cavity having a lower end at the bottom of the tracer platform, the bottom of the tracer platform and the bottom of the tracer element being shaped to leave a generally concave cavity which provides an open space between the bottom of the tracer platform and the propellant and acts as a gas seal upon ignition of the propellant.