(19)

(11)

EP 0 827 560 A1

(12)

(43) Date of publication: 11.03.1998 Bulletin 1998/11 (21) Application number: 97902492.0 (22) Date of filing: 05.02.1997

(51) International Patent Classification (IPC):  E04C 3/ 07( . ) E04C 3/ 04( . ) E04C 3/ 11( . ) (86) International application number: PCT/GB1997/000340 (87) International publication number: WO 1997/029255 (14.08.1997 Gazette 1997/35)

(84) Designated Contracting States: AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 05.02.1996 GB 19960002230 28.08.1996 GB 19960017911 (71) Applicant: Challender, Trevor Falmouth, Cornwall TR11 2UJ (GB)	(72) Inventor: Challender, Trevor Falmouth, Cornwall TR11 2UJ (GB) (74) Representative: Baillie, Iain Cameron, et al  Langner Parry 52-54 High Holborn London WC1V 6RR London WC1V 6RR (GB)