Patent ID: 8525090
Filing Date: 2013-09-03
Classification: F42B

Abstract:
1. An ammunition projectile, comprising: a body having an external surface, and a cavity; a spoiler that is translatable in the cavity between a retracted position wherein the spoiler is completely disposed in the cavity and an extended position wherein the spoiler projects from the external surface of the body; and wherein the cavity includes a spoiler guideway and a vane guideway, the projectile further comprising a rotary vane disposed in the vane guideway, wherein the rotary vane includes an attached eccentric cam and the spoiler includes a cam guide, the eccentric cam being disposed in the cam guide, and wherein the cavity includes a pair of ports disposed in the vane guideway, each port on an opposite side wall of said vane guideway, wherein compressed air pressure is selectively appliable to one or the other of the ports on one or the other side of the rotary vane and whereby said rotary vane is thereby selectively rotatable, and whereby said eccentric cam attached on said rotary vane is thereby also selectively rotatable therewith, and whereby said cam guide on the spoiler thereby is thereby also selectively movable in turn with the rotation of said eccentric cam, and wherein the spoiler is thereby effectively selectively translatable in turn by compressed air pressure applied on one of said ports to extend out of the spoiler guideway in the cavity and by compressed air pressure being applied on the opposite one of the said ports to retract the spoiler into the spoiler guideway in the cavity.