Patent ID: 6978967

Claim:
A fin deployment system for attachment to a projectile having a main axis, comprising: a plurality of fins; a plurality of hinges attached to an aft section of the projectile to rotate the fins from a stowed position to a deployed position after the projectile is launched; a retention cover attached to the aft section of the projectile to cover and retain the fins while the projectile is in storage and before the projectile is launched, further comprising a fin cover that provides retention of the fins while in the stowed position, and wherein the fin cover comprises a pressure reservoir that uses a propellant gas to deploy after the projectile is launched to release the fins into the deployed position; and wherein the fin cover further comprises a plurality of pressure equalization holes disposed radially, peripherally, externally, relative to the fin cover, to provide pressure mitigation for the fin cover, to permit the fin cover to selectively deploy after launch; and, wherein the fins wrap around the aft section prior to deployment and deploy radially relative to the projectile main axis.