Patent ID: 6315240
Filing Date: 2001-11-13
Classification: F42B

Abstract:
An improved, controllable fin assembly for guiding an aerodynamic body during high performance movement, comprising:a fin of aerodynamic configuration including a pair of outer walls extending between a relatively thin outer edge portion and a widened, inner fin platform portion andan output control shaft extending from the body, and having a pair of oppositely disposed sides inclined toward one another, with the inclined side wall portions of the cavity pre-loaded into abutting surface contact with the inclined sides of the output control shaft when the fin is mounted on the output control for joint rotation as required to control performance of the body,said fin platform portion having:at least one cavity disposed in a central portion of the platform and formed with a mouth portion facing away from the outer edge and having a pair of oppositely disposed side walls inclined toward one another as the distance from the cavity mouth increases anda curved bottom portion making surface contact with a rounded end portion of the output control shaft when the fin assembly is mounted on the output control shaft.