Ammunition and explosives – Cartridges – Practice projectile type
Reexamination Certificate
2000-02-02
2001-07-03
Tudor, Harold J. (Department: 3641)
Ammunition and explosives
Cartridges
Practice projectile type
C102S430000
Reexamination Certificate
active
06253682
ABSTRACT:
European patent specification EP 473 758 relates to non-lethal pyrotechnic ammunition for training and war games. A cartridge disclosed in this earlier specification includes a casing slidable relative to a plug at the forward end of the cartridge. When the cartridge is fired, force provided by the propellant gas is employed to urge the casing back against the breech-block and recycle the weapon.
This known cartridge is charged with a small quantity of propellant in addition to that contained in a primer. In order to achieve the objective of the cartridge, the propellant gas is fed through relatively constricted passages and galleries. Filling and machining tolerances mean that variations often occur in the weight of the additional propellant, and in flow rates through the passages and galleries, and lead to unreliable performance.
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Lahive & Cockfield LLP
Tudor Harold J.
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