(19)

(11)

EP 0 227 682 A1

(12)

(43) Date of publication: 08.07.1987 Bulletin 1987/28 (21) Application number: 85905168.0 (22) Date of filing: 03.10.1985

(51) International Patent Classification (IPC):  B23B 51/ 08( . ) B23B 51/ 10( . ) (86) International application number: PCT/US1985/001919 (87) International publication number: WO 1987/000100 (15.01.1987 Gazette 1987/01)

(84) Designated Contracting States: BE DE FR GB IT SE (30) Priority: 01.07.1985 US 19850750795 (71) Applicant: CATERPILLAR INC. Peoria Illinois 61629-6490 (US)	(72) Inventor: SALETRI, Richard, A. Oswego, IL 60543 (US) (74) Representative: Wagner, Karl H., et al  WAGNER & GEYER Patentanwälte Gewürzmühlstrasse 5 D-80538 München D-80538 München (DE)