(19)

(11)

EP 0 257 033 A1

(12)

(43) Date of publication: 02.03.1988 Bulletin 1988/09 (21) Application number: 86903007.0 (22) Date of filing: 24.04.1986

(51) International Patent Classification (IPC):  B66F 9/ 08( . ) (86) International application number: PCT/US1986/000843 (87) International publication number: WO 1987/005000 (27.08.1987 Gazette 1987/19)

(84) Designated Contracting States: DE FR GB (30) Priority: 24.02.1986 US 19860832495 (71) Applicant: CATERPILLAR INDUSTRIAL INC. Mentor, Ohio 44060 (US)	(72) Inventors: ERKER, James, W. Concord, OH 44060 (US) SCOTESE, Michael, J. Willoughby, OH 44094 (US) STOTTS, Jay, B. Mentor, OH 44060 (US) (74) Representative: Jackson, Peter Arthur, et al  GILL JENNINGS & EVERY Broadgate House 7 Eldon Street London EC2M 7LH London EC2M 7LH (GB)