(19)

(11)

EP 0 495 017 A1

(12)

(43) Date of publication: 22.07.1992 Bulletin 1992/30 (21) Application number: 91908041.0 (22) Date of filing: 16.04.1991

(51) International Patent Classification (IPC):  E03D 5/ 012( . ) E03D 9/ 10( . ) (86) International application number: PCT/GB1991/000593 (87) International publication number: WO 1991/016509 (31.10.1991 Gazette 1991/25)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IT LI LU NL SE (30) Priority: 17.04.1990 GB 19900008499 25.03.1991 GB 19910006316 (71) Applicant: PURCHASE, Darrell, Kenneth Wolverhampton WV2 3DN (GB)	(72) Inventor: PURCHASE, Darrell, Kenneth Wolverhampton WV2 3DN (GB)