(19)

(11)

EP 0 558 711 A1

(12)

(43) Date of publication: 08.09.1993 Bulletin 1993/36 (21) Application number: 92918772.0 (22) Date of filing: 26.08.1992

(51) International Patent Classification (IPC):  B24B 23/ 02( . ) B24D 13/ 08( . ) (86) International application number: PCT/US1992/006963 (87) International publication number: WO 1993/003887 (04.03.1993 Gazette 1993/06)

(84) Designated Contracting States: DE GB (30) Priority: 26.08.1991 US 19910750105 21.08.1992 US 19920933069 (71) Applicant: DYNABRADE, INC. Clarence, NY 14031 (US)	(72) Inventor: WELSCH, Walter, N. Tonawanda, NY 14150 (US) (74) Representative: MacGregor, Gordon, et al  ERIC POTTER CLARKSON St. Mary's Court St. Mary's Gate Nottingham, NG1 1LE Nottingham, NG1 1LE (GB)