(19)

(11)

EP 0 927 336 A1

(12)

(43) Date of publication: 07.07.1999 Bulletin 1999/27 (21) Application number: 97942361.0 (22) Date of filing: 19.09.1997

(51) International Patent Classification (IPC):  G01D 1/ 18( . ) (86) International application number: PCT/SE1997/001584 (87) International publication number: WO 1998/012506 (26.03.1998 Gazette 1998/12)

(84) Designated Contracting States: AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 20.09.1996 SE 19960003437 (71) Applicant: Nordström, Christer 186 70 Brottby (SE)	(72) Inventor: Nordström, Christer 186 70 Brottby (SE) (74) Representative: Sundström, Per Olof, et al  Stenhagen Patentbyra AB P.O. Box 4630 116 91 Stockholm 116 91 Stockholm (SE)