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(11)

EP 0 339 051 A1

(12)

(43) Date of publication: 02.11.1989 Bulletin 1989/44 (21) Application number: 88902622.0 (22) Date of filing: 12.01.1988

(51) International Patent Classification (IPC):  E02F 3/ 76( . ) E02F 3/ 80( . ) (86) International application number: PCT/US1988/000021 (87) International publication number: WO 1988/005482 (28.07.1988 Gazette 1988/17)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 13.01.1987 CA 19870527260 (71) Applicants: CHAMPION ROAD MACHINERY LIMITED Ontario NTA 3Y6 (CA) CHAMPION ROAD MACHINERY INTERNATIONAL CORPORATION West Columbia, SC 29169 (US)	(72) Inventors: ROSS, Murray, A. Goderich, Ontario N7A 3Y2 (CA) ADAMS, Gordon, L. Goderich, Ontario N7A 3R7 (CA) SULLY, Michael, A. Goderich, Ontario N7A 1W9 (CA) (74) Representative: Westwood, Edgar Bruce  STEVENS, HEWLETT & PERKINS 5, Quality Court Chancery Lane London WC2A 1HZ London WC2A 1HZ (GB)