Braking device for a trajectory-correctable spin-stabilized artillery projectile

• US 7,347,147 B2
• Filed: 09/10/2003
• Issued: 03/25/2008
• Est. Priority Date: 09/13/2002
• Status: Active Grant

• Current Assignee: Diehl BGT Defence GmbH & Company KG (Diehl VA Systeme Stiftung & Company KG)
• Original Assignee: Diehl BGT Defence GmbH & Company KG (Diehl VA Systeme Stiftung & Company KG)
• Inventors: Bär, Klaus, Kautzsch, Karl
• Primary Examiner(s): Bergin; James S
• Application Number:
  US10/527,306
• Publication Number:
  US 20050258308A1
• Time in Patent Office: 1,658 Days
• Field of Search: 102/501, 102/529, 102/473, 102/490, 102/498, 102/385, 102/388, 244/3.27, 244/113, 244/3.29, 244/3.1, 244/3.21, 244/3.23, 244/3.24, 244/3.25, 244/3.26, 244/3.28
• US Class Current: 102/473
• CPC Class Codes: F42B 10/50 Brake flaps , e.g. inflatable

Abstract

In order to move a textile braking element (16) which is in the form of an annular disk and which is deployed radially under the effect of centrifugal force rapidly into a contour which is stable in respect of shape and which is always properly defined even under afflux flow conditions, a cloth (33) which is cut in the form of a circular ring is provided by virtue of radially extending tucks or darts, with a reduced outside periphery (32) in such a way that the opening movement is thereby limited to the shape of a flat obtuse-angled hollow truncated cone which, by means of reinforcing bands (34) which are sewn on along generatrices of the frustoconical surface, is pivotably mounted to the holding ring (15) at the inside periphery (31) while along the outside periphery (32), it is provided with a peripherally extending accumulation of mass (29) for increasing the centrifugal deployment forces; wherein in the front end region of the stowage space (14), the ring (15) is axially fitted into the contour of the fuse (12), in such a way as to temporarily slip relative to the projectile spin.

Claims

1. A braking arrangement comprising a braking element which is radially deployable from a stowage space (14) located in the fuse region of an ogive of a correctable-trajectory artillery projectile (12) below a hood which is adapted to be blown off from said projectile,

said braking element extending peripherally unitarily and gaplessly in a circumferential direction upon deployment from said stowage space (14), said braking element being in the form of a textile screen (16) comprised of a cloth (33), which is cut in a circular round configuration in a plane and is gathered up in a peripheral direction with selectively radial sector cuts or sewing seams or with radially extending tucks or darts, such that said textile screen (16), by virtue of said cloth being gathered up in the peripheral direction, is prevented from being opened out into a substantially flat textile disk but is resultingly adapted to deploy only into an obtuse-angled frusto-conical shape and thereby is always able to stably maintain said frusto-conical shape in a condition of maximum deployment;

and

wherein said textile screen (16) in a front region of said stowage space (14) is pivotably mounted with a smaller base of its frusto-conical shape to a holding ring (15), said smaller base facing forwardly in the direction of flight of the projectile.

2. A braking arrangement as set forth in claim 1, wherein the screen (16) is provided with radially extending reinforcing bands (34) which are wrapped around the holding ring (15), bridging over an internal radial spacing between an inside periphery (31) of the screen and the holding ring (15).

3. A braking arrangement as set forth in claim 1, wherein the holding ring (15) is axially gripped into the contour of a fuse (11) in the fuse region so as to be rotatable with respect to the spin of the projectile (12).

4. A braking arrangement as set forth in claim 1, wherein the outside periphery (32) of the screen (16) is provided with an additional weight of a mass (29).