(19)

(11)

EP 0 020 367 A1

(12)

(43) Date of publication: 07.01.1981 Bulletin 1981/01 (21) Application number: 79900954.0 (22) Date of filing: 12.12.1978

(51) International Patent Classification (IPC):  B62D 55/ 00( . ) B62D 55/ 084( . ) E02F 3/ 36( . ) E02F 9/ 12( . ) B62D 49/ 08( . ) B62D 55/ 116( . ) E02F 9/ 02( . ) (86) International application number: PCT/US1978/000208 (87) International publication number: WO 1980/001268 (26.06.1980 Gazette 1980/14)

(84) Designated Contracting States: CH DE FR GB SE (71) Applicant: CATERPILLAR TRACTOR CO. Peoria, Illinois 61629 (US)	(72) Inventor: STEDMAN, Robert N. Chillicothe, IL 61523 (US)