(19)

(11)

EP 1 057 071 A1

(12)

(43) Date of publication: 06.12.2000 Bulletin 2000/49 (21) Application number: 99908807.3 (22) Date of filing: 20.01.1999

(51) International Patent Classification (IPC)7: G02C 1/06 (86) International application number: PCT/EP9900/364 (87) International publication number: WO 9942/890 (26.08.1999 Gazette 1999/34)

(84) Designated Contracting States: AT CH DE DK ES FR GB IT LI (30) Priority: 17.02.1998 IT PD980032 (71) Applicant: Allison S.p.A. 35010 Limena (IT)	(72) Inventor: VECELLIO REANE, Silvio I-35100 Padova (IT) (74) Representative: Modiano, Guido, Dr.-Ing. et al Modiano & Associati SpAVia Meravigli, 16 20123 Milano 20123 Milano (IT)