The invention relates to an arrangement for a weapon comprising a countermass (6) for reducing the pressure around the weapon. The countermass (6) is enclosed in a countermass container (5) which can be opened at both ends (8, 28). The invention aims to bring about a symmetrical opening with favourable recoil in a better way than in previous constructions. This is achieved by the countermass comprising means which can bind and retain the liquid symmetrically in a desired geometry over the cross section of the barrel and the cross section of any following expansion part.

Arrangement for weapon

A countermass for use in a weapon to balance the forces arising when a launch able unit is launched from a launcher tube of the weapon. The countermass includes a first container enclosing a liquid. A countermass weapon includes a launcher tube open or openable in both ends. The launcher tube houses a launch able unit, a countermass including a first container enclosing a liquid, a pressure chamber, and a propellant charge that upon firing and combustion of the charge in cooperation with the pressure chamber and the countermass accelerates the launch able unit forwards in the tube at the same time as the countermass accelerates backwards in the tube. The first container is made of a non-rigid material. A second container is provided to cover or almost cover the first container. The second container is designed with damping characteristics.

Countermass and countermass weapon

A pollution-free liquid balancing device comprises a sealing bag (1), a front cover (2), a rear cover (3) and liquid balancing matter (4), wherein the sealing bag (1), the front cover (2) and the rear cover (3) are all plastic material. The sealing bag (1) is filled with the liquid balancing matter (4) inside, and plastically sealed under high temperature at both ends. The diameters of the front cover (2) and the rear cover (3) are matched with the inner diameter of a launch barrel (5), and the sealing bag (1) is provided between the front cover (2) and the rear cover (3). In an ordinary transportation state, the liquid balancing matter (4) is well sealed in the sealing bag (1), and a missile is launched forward by the propulsion of powder during launch, the sealing bag (1), the front cover (2) and the rear cover (3) crack instantaneously, and the liquid balancing matter (4) is ejected backward outside the barrel at high speed. The forward and backward impulses are similar or equal, thereby reducing or eliminating the impulse to the launch barrel (5) during launch. Said device has a simple structure and uses the pollution-free liquid balancing matter (4), thus there is no pollution after launch.

Pollution-free liquid balancing device

A bleeding mechanism for use in the propulsion system of a recoilless, insensitive munition utilizing a utilizing a fluidic countermass The present bleeding mechanism utilizes a firing pin or a similar puncture or tear device A heat sensitive material blocks the movement of the firing pin A mechanical locking mechanism locks the firing pin in position until it is unlocked by the melting of the heat sensitive material When the insensitive munition is exposed to heat, the reaction of the heat sensitive material within the bleeding mechanism allows the firing pin to be released and to rupture a cartridge seal The cartridge may be filled with a compressed compound, which releases gas under pressure to the countermass container, causing a countermass cover to rupture, thereby emptying the countermass fluid

Bleeding mechanism for use in a propulsion system of a recoilless, insensitive munition

A pressure release mechanism for a sonic rarefaction wave-type low-recoil gun system employing controlled plastic venting that exhibits adiabatic shear banding to effect a delayed pressure release.

Controlled plastic venting for low-recoil gun systems

A method of configuring a preloaded anti-armour weapon of the disposable type and including a countermass container in transport mode for restraining a shell loaded in a barrel of the weapon. The countermass container is replaced with a locking ring and the loaded barrel is placed in a first compartment and the countermass container is placed in a second compartment of a transport box.

Method of configuring weapon

Anordning vid vapen innefattande en motmassa för att sänka trycket kring vapnet, varvid motmassans huvudbeståndsdel är vätska som binds och hålls kvar av kapillärkrafter

Kent Norgren

Papers

Arrangement for weapon

Method of configuring weapon

Anordning vid vapen innefattande en motmassa för att sänka trycket kring vapnet, varvid motmassans huvudbeståndsdel är vätska som binds och hålls kvar av kapillärkrafter