(19)

(11)

EP 0 386 149 A1

(12)

(43) Date of publication: 12.09.1990 Bulletin 1990/37 (21) Application number: 89900722.0 (22) Date of filing: 16.11.1988

(51) International Patent Classification (IPC):  G01B 11/ 275( . ) (86) International application number: PCT/US1988/004117 (87) International publication number: WO 1989/004947 (01.06.1989 Gazette 1989/12)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 17.11.1987 US 19870121853 (71) Applicant: AXLE-TRU, INC. Columbia City, IN 46725 (US)	(72) Inventor: FOURNIER, Jerald, C. Columbia City, IN 46725 (US) (74) Representative: Hitchcock, Esmond Antony, et al  Lloyd Wise, Tregear & Co. Norman House 105-109 Strand London WC2R 0AE London WC2R 0AE (GB)