(19)

(11)

EP 0 941 409 A1

(12)

(43) Date of publication: 15.09.1999 Bulletin 1999/37 (21) Application number: 97951443.0 (22) Date of filing: 26.11.1997

(51) International Patent Classification (IPC):  G01B 15/ 00( . ) G01B 17/ 00( . ) G01S 13/ 88( . ) F15B 15/ 28( . ) G01S 13/ 02( . ) (86) International application number: PCT/US1997/021097 (87) International publication number: WO 1998/023867 (04.06.1998 Gazette 1998/22)

(84) Designated Contracting States: DE FR GB (30) Priority: 27.11.1996 US 19960753791 27.11.1996 US 19960758092 (71) Applicant: Case Corporation Racine, WI 53404 (US)	(72) Inventors: CHAN, Danley, C. West Burlington, IA 52655 (US) BERGER, Alan, A. Winfield, IL 60190 (US) (74) Representative: UEXKÜLL & STOLBERG  Patentanwälte Beselerstrasse 4 22607 Hamburg 22607 Hamburg (DE)