Abstract

The invention relates to a multi-round launcher [10] comprising a pin dowel index [30] arranged approximate one end of a cylinder [22]; and a mechanically-actuated indexing mechanism [38] which operates entirely independently of gas pressure and which is configured to improve indexing of such a weapon, particularly when lower velocity ammunition is used. The indexing mechanism [38] comprises an advance lever [40] which is linked to and mechanically actuated by a trigger mechanism [28]; and a displaceable indexing shaft [42] which is linked to and mechanically actuated by the advance lever [40], the indexing shaft [42] being displaceable between a resting position and an actuated position so that the indexing shaft [42] alternately engages and disengages the pin dowel index [30] of the cylinder [22],

IPC Classes  ?

• F41A 9/25 - Feeding of unbelted ammunition using a movable magazine or clip as feeding element using a sliding clip
• F41A 9/79 - Magazines for belted ammunition
• F41A 11/02 - Modular concepts, e.g. weapon-family concepts
• F41C 7/02 - Pump-action guns, i.e. guns having a reciprocating handgrip beneath the barrel for loading or cocking
• F41C 23/04 - Folding or telescopic stocks or stock parts
• F41C 27/06 - Adaptations of smallarms for firing grenades, e.g. rifle grenades, or for firing riot-control ammunitionBarrel attachments therefor
• F42B 7/02 - Cartridges, i.e. cases with propellant charge and missile
• F42B 12/36 - Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect for dispensing materialsProjectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect for producing chemical or physical reactionProjectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect for signalling
• F42B 12/64 - Cluster or cargo ammunition, i.e. projectiles containing one or more submissiles the submissiles being ejected parallel to the longitudinal axis of the projectile the submissiles being of shot- or flechette-type

Abstract

The invention relates to a variable port pressure device (10) or gas plug, adapted for use on a multiple grenade launcher, and configured to improve indexing of such a weapon, particularly when used with lower velocity ammunition. The device comprises a piston (14) which is co-axially displaceable within a piston housing (12), the piston (14) comprising a groove (16) extending about an exterior wall surface (14.1) of the piston (14) so as to create a tortuous gas flow path between the piston (14) and the piston housing (12), and a hollow cylindrical body (14.2) which terminates at one end thereof in a concave base wall (20).

IPC Classes  ?

• F41C 27/06 - Adaptations of smallarms for firing grenades, e.g. rifle grenades, or for firing riot-control ammunitionBarrel attachments therefor
• F42B 30/00 - Projectiles or missiles, not otherwise provided for, characterised by the ammunition class or type, e.g. by the launching apparatus or weapon used
• F41B 11/00 - Compressed-gas guns, e.g. air gunsSteam guns
• F41B 11/62 - Compressed-gas guns, e.g. air gunsSteam guns characterised by the supply of compressed gas with pressure supplied by a gas cartridge
• F41B 11/80 - Compressed-gas guns, e.g. air gunsSteam guns specially adapted for particular purposes
• F41A 5/00 - Mechanisms or systems operated by propellant charge energy for automatically opening the lock
• F41A 21/00 - Barrels or gun tubesMuzzle attachmentsBarrel mounting means