(19)

(11)

EP 0 346 393 A1

(12)

(43) Date of publication: 20.12.1989 Bulletin 1989/51 (21) Application number: 88902996.0 (22) Date of filing: 27.01.1988

(51) International Patent Classification (IPC):  G01F 1/ 06( . ) G01P 5/ 06( . ) G01P 5/ 00( . ) G01P 5/ 07( . ) (86) International application number: PCT/US1988/000226 (87) International publication number: WO 1988/005915 (11.08.1988 Gazette 1988/18)

(84) Designated Contracting States: DE FR GB IT NL (30) Priority: 28.01.1987 US 19870007527 (71) Applicant: AIRMAR TECHNOLOGY CORPORATION Milford, NH 03055 (US)	(72) Inventor: BOUCHER, Stephen, G. Amherst, NH 03301 (US) (74) Representative: Holdcroft, James Gerald, Dr.  Graham Watt & Co., Riverhead Sevenoaks, Kent TN13 2BN Sevenoaks, Kent TN13 2BN (GB)