(19)

(11)

EP 0 179 769 A1

(12)

(43) Date of publication: 07.05.1986 Bulletin 1986/19 (21) Application number: 84902760.0 (22) Date of filing: 30.07.1984

(51) International Patent Classification (IPC):  E02F 9/ 22( . ) F15B 11/ 05( . ) (86) International application number: PCT/US1984/001072 (87) International publication number: WO 1985/005155 (21.11.1985 Gazette 1985/25)

(84) Designated Contracting States: AT BE CH DE FR GB LI LU NL SE (30) Priority: 07.05.1984 US 19840607898 (71) Applicant: CATERPILLAR TRACTOR CO. Peoria, Illinois 61629 (US)	(72) Inventor: BUDZICH, Tadeusz Moreland Hills, OH 44022 (US)