(19)
(11) EP 0 484 958 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
28.10.1992 Bulletin 1992/44

(43) Date of publication A2:
13.05.1992 Bulletin 1992/20

(21) Application number: 91119054.4

(22) Date of filing: 08.11.1991
(51) International Patent Classification (IPC)5: F42B 10/06
(84) Designated Contracting States:
BE CH DE FR GB IT LI SE

(30) Priority: 09.11.1990 US 611121

(71) Applicant: ALLIANT TECHSYSTEMS INC.
Minnetonka, Minnesota 55343 (US)

(72) Inventors:
  • Walker, F. Joseph
    Maple Grove, MN 55369 (US)
  • Jones, Mark P.
    Plymouth, MN 55446 (US)
  • Walensky, Loren J.
    Brooklyn Park, MN 55443 (US)

(74) Representative: Altenburg, Udo, Dipl.-Phys. et al
Patent- und Rechtsanwälte Bardehle . Pagenberg . Dost . Altenburg . Frohwitter . Geissler & Partner Postfach 86 06 20
D-81633 München
D-81633 München (DE)


(56) References cited: : 
   
       


    (54) Protective coating for projectile fins


    (57) An ablative coating is provided on the stabilizing fins of a cannon-fired high velocity munition projectile to prevent thermal degradation and abrasion of the fins during shell firing and projectile flight. The ablative coating consists preferably or a siloxane polymer which becomes a protective ablative ceramic char when heated in air.






    Search report