US 11,898,831 B2
Method and system for creating marks on bullets
Nicolas Mouret, Verdun (CA); Valentin Dulhariu, Laval (CA); and Paul J. Murphy, Virginia Beach, VA (US)
Assigned to ULTRA ELECTRONICS FORENSIC TECHNOLOGY INC., Montreal (CA)
Appl. No. 17/995,498
Filed by ULTRA ELECTRONICS FORENSIC TECHNOLOGY INC., St-Laurent (CA)
PCT Filed Apr. 22, 2021, PCT No. PCT/CA2021/050552
§ 371(c)(1), (2) Date Oct. 5, 2022,
PCT Pub. No. WO2021/212228, PCT Pub. Date Oct. 28, 2021.
Claims priority of provisional application 63/163,272, filed on Mar. 19, 2021.
Claims priority of provisional application 63/014,362, filed on Apr. 23, 2020.
Prior Publication US 2023/0175824 A1, Jun. 8, 2023
Int. Cl. F42B 35/00 (2006.01); F42B 5/02 (2006.01)
CPC F42B 35/00 (2013.01) [F42B 5/025 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A bullet compressing device for creating marks imparted by a barrel of a gun on a bullet, comprising:
a first member;
a second member spaced from the first member by a gap, a dimension of the gap selected to correspond to at least a length of the bullet, the first and second members slidingly receivable within the barrel of the gun;
a biasing member in engagement with the first and second members, the biasing member having a compressed configuration in which the first and second members are biased toward one another thereby decreasing the dimension of the gap,
one of the first and second members engageable by an actuator, the first and second members and the bullet received therebetween movable relative to the barrel thereby imparting marks on the bullet by the barrel upon actuation of the actuator.
 
13. A method of creating marks imparted by a barrel of a gun on a bullet, comprising: securing the gun to a frame of a cold-firing apparatus; inserting the bullet within the barrel; deforming the bullet in a radially outward direction relative to a central axis of the barrel by pushing on the bullet towards a muzzle of the barrel using a member engaged to the bullet, the member engaged to a pulling device of the cold-firing apparatus, the pulling device secured to the frame; and extracting the bullet in an axial direction along the barrel with the member and the pulling device thereby imparting marks on the bullet.
 
17. A cold firing apparatus for creating barrel marks on a bullet with a barrel of a firearm, comprising: a frame; a holding device secured to the frame and operable to hold the firearm; a member operable to push the bullet out of the barrel while the bullet is inside the barrel; and a pulling device engaged to the member and secured to the frame, the pulling device operable to pull on the member such that the member exerts a pushing force on the bullet along the barrel of the firearm and towards a muzzle of the barrel.