(19)

(11)

EP 0 541 657 A1

(12)

(43) Date of publication: 19.05.1993 Bulletin 1993/20 (21) Application number: 91914154.0 (22) Date of filing: 01.08.1991

(51) International Patent Classification (IPC):  B24B 7/ 18( . ) B24B 49/ 12( . ) (86) International application number: PCT/GB1991/001317 (87) International publication number: WO 1992/002334 (20.02.1992 Gazette 1992/05)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IT LI LU NL SE (30) Priority: 01.08.1990 GB 19900016897 (71) Applicant: CONCRETE GRINDING LTD. High Wycombe, Bucks HP14 4RL (GB)	(72) Inventors: BECKETT, James Leonard Naphill, High Wycombe, Bucks HP14 4RL (GB) DARE, Kevin Huddersfield, Yorkshire HD7 1YQ (GB) (74) Representative: Allsop, John Rowland  European Patent Attorney 10 London End Beaconsfield, Bucks. HP9 2JH Beaconsfield, Bucks. HP9 2JH (GB)