(19)

(11)

EP 0 506 864 A1

(12)

(43) Date of publication: 07.10.1992 Bulletin 1992/41 (21) Application number: 91902642.0 (22) Date of filing: 06.12.1990

(51) International Patent Classification (IPC):  B60P 7/ 02( . ) B60J 7/ 08( . ) (86) International application number: PCT/US1990/007179 (87) International publication number: WO 1991/009751 (11.07.1991 Gazette 1991/15)

(84) Designated Contracting States: AT BE DE DK FR GB IT LU NL SE (30) Priority: 22.12.1989 US 19890455700 (71) Applicant: CHENG, John C. Pasadena, CA 91105 (US)	(72) Inventor: CHENG, John C. Pasadena, CA 91105 (US) (74) Representative: Gee, David William  Farmhouse Court Marston Nr. Sutton Coldfield West Midlands B76 0DW Marston Nr. Sutton Coldfield West Midlands B76 0DW (GB)