Gas actuated gun system for launching a projectile

Details Gas actuated gun system for launching a projectile Gas actuated gun system for launching a projectile

1985-09-10

1987-02-24

Bentley, Stephen C.

Ordnance

Pneumatic

F41F 104

Patent

active

046448438

ABSTRACT:
An improved and repetitively operable gaseous-propellant gun system for lching one or more projectiles to strike a target, especially a relatively high-speed target at close range. The system is generally made up of a housing having a chamber therein with enlarged and reduced chamber portions. A double-acting piston includes enlarged and reduced tandem pistons for advancement in opposite directions within the chamber. A gaseous source means controls the admittance or release of a lightweight gaseous medium to the reduced chamber portion. A projectile support and handling arrangement functions to securely position a projectile in the barrel bore. A forced air inlet and exhaust subassembly not only admits a first volume of air to be compressed between the enlarged piston and the housing but also admits a second volume of air between the enlarged and reduced pistons so as to biasingly urge the double-acting piston towards the enlarged chamber end of the housing. A fuel injection subassembly timely introduces during each operative cycle of the system a predetermined amount of fuel, such as, e.g., a suitable grade of diesel fuel or ordinary gas turbine fuel for marine vessels, into the compressed air so as to form an ignitable and explosive fuel-air admixture for driving the double-acting piston in a direction to further pressurize the gaseous means in order to cause fracture of the projectile from its support and launching of the projectile from the barrel at a relatively high velocity to strike a target.

REFERENCES:
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patent: 3046737 (1962-07-01), Ottestad
patent: 3102553 (1963-09-01), Ottestad
patent: 3496827 (1970-02-01), Dardick
patent: 3712171 (1973-01-01), Sweigart
patent: 4038903 (1977-08-01), Wohlford
patent: 4047465 (1977-09-01), Wohlford
patent: 4057002 (1977-11-01), Donovan

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