초록 ▼

This specification discloses an ammunition round and a method of firing the ammunition round. Consecutive and reproducible firing of a primer charge and a main propellant charge is accomplished as a result of the physical movement of a divider physically separating the primer charge from the main ch

This specification discloses an ammunition round and a method of firing the ammunition round. Consecutive and reproducible firing of a primer charge and a main propellant charge is accomplished as a result of the physical movement of a divider physically separating the primer charge from the main charge. Firing of the primer charge causes movement of the divider, initiates movement of a projectile within the ammunition round, and, when the combustion gases of the primer charge are in communication with the main propellant charge, causes firing of the main propellant charge. The divider is retained within the ammunition round by a ring which limits movement of the divider.

대표청구항 ▼

An ammunition round comprising: a propellant charge means having an axial cavity for supplying firing power for said ammunition round; a projectile means housed within said cavity for being fired from said ammunition round; a control tube means for selectively covering portions of said propellant ch

An ammunition round comprising: a propellant charge means having an axial cavity for supplying firing power for said ammunition round; a projectile means housed within said cavity for being fired from said ammunition round; a control tube means for selectively covering portions of said propellant charge means facing said axial cavity thereby putting selected portions of said propellant charge in communication with said axial cavity and being generally positioned between said propellant charge means and said projectile means; a primer means positioned generally aft of said projectile means for providing a firing force as part of a firing sequence from said ammunition round; said control tube means including a first firing opening for providing an access to said propellant charge means from said axial cavity so that temperature and pressure conditions within said axial cavity adjacent said first firing opening can act on said propellant means thus providing for firing of said propellant charge means; a piston means positioned aft of said projectile means so that forward motion of said piston means within said axial cavity causes forward motion of said projectile means within said axial cavity, said piston means separating said axial cavity into a forward portion and aft portion, and said piston means being conditionable between a first condition separating said primer means and said first firing opening thus providing a barrier between said primer means and said propellant means and a second condition permitting communication between said propellant means and said primer means through said firing opening; said piston means having a generally cylindrical outer shape, a rearwardly opening recess means for receiving a charge and a flange means extending circumferentially around said piston means for obstructing the flow of combustion gases between said piston means and said control tube means, and for guiding said piston means within said control tube means, said flange means having a greater diameter than the remainder of said piston means so that the remainder of said piston means is spaced from said control tube means and can pass by said stop means and said flange means engages said stop means; a stop ring means coupled to said control tube for limiting forward movement of said piston means thereby retaining said piston means within said ammunition round; said control tube means having a threaded recess for receiving said stop means; and said stop means being a generally annular member with an external, peripheral threaded portion adapted to mate with said threaded recess, said stop means having a rim means protruding into said axial cavity and sized to pass forward travel of said piston means until said flange means abuts said rim means, the longitudinal extent of said rim means being less than the longitudinal extent of said external peripheral threaded portion.