(19)

(11)

EP 0 198 840 A1

(12)

(43) Date of publication: 29.10.1986 Bulletin 1986/44 (21) Application number: 85904375.0 (22) Date of filing: 26.08.1985

(51) International Patent Classification (IPC):  E02F 3/ 40( . ) E02F 3/ 36( . ) (86) International application number: PCT/US1985/001622 (87) International publication number: WO 1986/002681 (09.05.1986 Gazette 1986/10)

(84) Designated Contracting States: BE DE FR GB IT SE (30) Priority: 29.10.1984 US 19840665485 (71) Applicant: CATERPILLAR TRACTOR CO. Peoria, Illinois 61629 (US)	(72) Inventors: DeGEETER, Robert, L. Oswego, IL 60543 (US) KNELL, Harvey, A. Yorkville, IL 60560 (US) (74) Representative: Wagner, Karl H.  WAGNER & GEYER Patentanwälte Gewürzmühlstrasse 5 D-80538 München D-80538 München (DE)