Grenade-type projectile

A projectile-and-casing unit comprising

• (a) a grenade projectile having a longitudinal axis and comprising
• (1) a projectile housing having a fragmentation length portion;
• (2) an explosive charge accommodated in said projectile housing and being surrounded by said fragmentation length portion;
• (3) a forwardly acting shaped charge liner bounding said explosive charge at a front end thereof, as viewed in a flight direction of the projectile;
• and
• (4) a percussion fuse assembly accommodated in said projectile housing behind said explosive charge as viewed in said flight direction;
• said percussion fuse assembly including a percussion member, a flight acceleration-responsive first safety means and a centrifugal force-responsive second safety means for arming the percussion member when the projectile reaches a predetermined acceleration and a predetermined spin;
• (b) a cartridge casing having a rear base;
• and
• (c) a propelling unit disposed in said cartridge casing and being secured to said rear base;
• said propelling unit including
• (1) a holder body having a central cavity provided with an open front end;
• (2) propellant powder disposed in said cavity;
• and
• (3) a closure plate closing off said open front end of said cavity and including means for defining a plurality of throughgoing passages oriented at an acute angle to said flight direction and being mutually divergent relative thereto.

A grenade projectile having a longitudinal axis and comprising

• (a) a projectile housing having a fragmentation length portion;
• (b) an explosive charge accommodated in said projectile housing and being surrounded by said fragmentation length portion;
• (c) a forwardly acting shaped charge liner bounding said explosive charge at a front end thereof, as viewed in a flight direction of the projectile;
• and
• (d) a percussion fuse assembly accommodated in said projectile housing behind said explosive charge as viewed in said flight direction;
• said percussion fuse assembly including
• (1) a percussion member,
• (2) a flight acceleration-responsive first safety means;
• (3) a centrifugal force-responsive second safety means for arming the percussion member when the projectile reaches a predetermined acceleration and a predetermined spin;
• (4) a detonator carrier;
• (5) a detonator secured to said detonator carrier;
• (6) eccentric pivot means having a pivot axis being parallel to and spaced from said longitudinal axis and supporting said detonator carrier for swinging motions thereof in response to centrifugal forces derived from the projectile spin;
• (7) an acceleration-responsive device forming part of said first safety means and being arranged for preventing swinging motions of said detonator carrier until the predetermined flight acceleration is reached;
• (8) a centrifugal force-responsive device forming part of said second safety means and being arranged for preventing swinging motions of said detonator carrier until the predetermined spin is reached;
• (9) a firing pin holder supported for axial displacement;
• and
• (10) a firing pin, constituting said percussion member, supported in said firing pin holder for axial displacement relative thereto;
• said detonator assuming an aligned position relative to said firing pin when said detonator carrier has swung in response to centrifugal forces derived from the spin of the projectile.

A grenade projectile having a longitudinal axis and comprising

• (a) a projectile housing having a fragmentation length portion;
• (b) an explosive charge accommodated in said projectile housing and being surrounded by said fragmentation length portion;
• (c) a forwardly acting shaped charge liner bounding said explosive charge at a front end thereof, as viewed in a flight direction of the projectile;
• and
• (d) a percussion fuse assembly accommodated in said projectile housing behind said explosive charge as viewed in said flight direction;
• said percussion fuse assembly including
• (1) a percussion member;
• (2) a flight acceleration-responsive first safety means;
• (3) a centrifugal force-responsive second safety means for arming the percussion member when the projectile reaches a predetermined acceleration and a predetermined spin;
• (4) a fuse holding held in said projectile housing;
• (5) a carrier supporting said percussion member and being held in said fuse holding for sliding motions parallel to said longitudinal axis;
• (6) a spring means urging said carrier in said flight direction into an abutting relationship with said fuse housing;
• and
• (7) retaining means for preventing said carrier from moving in response to said spring means after said carrier has moved into a withdrawn position against the force of said spring means in a direction opposite said flight direction in response to acceleration forces.