(19)

(11)

EP 1 073 927 A1

(12)

(43) Date of publication: 07.02.2001 Bulletin 2001/06 (21) Application number: 00901295.6 (22) Date of filing: 07.02.2000

(51) International Patent Classification (IPC)7: G02C 1/02 (86) International application number: PCT/IB0000/129 (87) International publication number: WO 0048/034 (17.08.2000 Gazette 2000/33)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 09.02.1999 IT PD990021 (71) Applicant: Allison S.p.A. 35010 Limena (IT)	(72) Inventor: VECELLIO REANE, Silvio I-35100 Padova (IT) (74) Representative: Modiano, Guido, Dr.-Ing.  Modiano & Associati SpAVia Meravigli, 16 20123 Milano 20123 Milano (IT)