(19)

(11)

EP 0 862 721 A1

(12)

(43) Date of publication: 09.09.1998 Bulletin 1998/37 (21) Application number: 96945947.0 (22) Date of filing: 18.12.1996

(51) International Patent Classification (IPC):  F41A 21/ 02( . ) (86) International application number: PCT/US1996/020304 (87) International publication number: WO 1997/022843 (26.06.1997 Gazette 1997/27)

(84) Designated Contracting States: AT BE CH DE DK ES FI FR GB GR IE IT LI NL PT SE (30) Priority: 18.12.1995 US 19950573697 18.12.1995 US 19950574402 18.12.1995 US 19950573693 (71) Applicant: Christensen, Roland Fayette, UT 84630 (US)	(72) Inventor: Christensen, Roland Fayette, UT 84630 (US) (74) Representative: Gilmour, David Cedric Franklyn, et al  POTTS, KERR & CO. 15 Hamilton Square Birkenhead Merseyside L41 6BR Birkenhead Merseyside L41 6BR (GB)