US 11,965,721 B2
Closure disk assembly for tracer projectile
Eric Lafortune, Repentigny (CA)
Assigned to GENERAL DYNAMICS ORDNANCE AND TACTICAL SYSTEMS—CANADA, INC., Repentigny (CA)
Filed by General Dynamics Ordnance and Tactical Systems—Canada, Inc., Repentigny (CA)
Filed on Sep. 13, 2022, as Appl. No. 17/931,795.
Prior Publication US 2024/0093979 A1, Mar. 21, 2024
Int. Cl. F42B 12/38 (2006.01); F42B 33/00 (2006.01); F42B 10/38 (2006.01)
CPC F42B 12/38 (2013.01) [F42B 33/001 (2013.01); F42B 10/38 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A tracer projectile comprising;
a projectile having a tracer cavity formed into a projectile base and an annular groove formed into a rear face of the projectile base to provide a ring flange surrounding the tracer cavity;
a pyrotechnic charge pressed into the tracer cavity, wherein the pyrotechnic charge is ignitable by burning propellant such that a trajectory of the projectile is visible when fired;
a closure disk assembly having a thin-walled crown covering the tracer cavity, a sidewall extending along an inner surface of the annular groove and a rim extending along an inner face of the annular groove, wherein the ring flange supports the crown on the projectile base such that the burning propellant ruptures the crown when the projectile is fired; and
a retaining element disposed in the annular groove and engaging the rim for securing the closure disk assembly to the projectile base over the tracer cavity.