(19)

(11)

EP 0 072 796 A1

(12)

(43) Date of publication: 02.03.1983 Bulletin 1983/09 (21) Application number: 81901609.0 (22) Date of filing: 24.02.1981

(51) International Patent Classification (IPC):  B66C 1/ 42( . ) B66C 1/ 46( . ) B25J 15/ 00( . ) (86) International application number: PCT/US1981/000225 (87) International publication number: WO 1982/002872 (02.09.1982 Gazette 1982/21)

(84) Designated Contracting States: DE FR GB (71) Applicant: CATERPILLAR TRACTOR CO. Peoria, Illinois 61629 (US)	(72) Inventors: HUFF, Edward R. Washington, IL 61571 (US) WARNER, Hubert H. Pekin, IL 61554 (US) (74) Representative: Wagner, Karl H.  WAGNER & GEYER Patentanwälte Gewuerzmuehlstrasse 5 Postfach 246 D-8000 München 22 D-8000 München 22 (DE)