(19)

(11)

EP 0 818 077 A1

(12)

(43) Date of publication: 14.01.1998 Bulletin 1998/03 (21) Application number: 96908889.0 (22) Date of filing: 21.03.1996

(51) International Patent Classification (IPC):  H02K 1/ 20( . ) H02K 1/ 22( . ) H02K 1/ 27( . ) H02K 16/ 02( . ) H02K 19/ 36( . ) H02K 21/ 14( . ) H02P 9/ 14( . ) H02P 9/ 34( . ) H02K 3/ 51( . ) H02K 11/ 00( . ) H02H 7/ 06( . ) H02K 1/ 24( . ) H02K 16/ 00( . ) H02K 19/ 22( . ) H02K 21/ 04( . ) H02P 9/ 00( . ) H02P 9/ 30( . ) H02H 5/ 04( . ) H02K 9/ 06( . ) H02K 19/ 10( . ) (86) International application number: PCT/US1996/003914 (87) International publication number: WO 1996/030992 (03.10.1996 Gazette 1996/44)

(84) Designated Contracting States: AT DE ES FR GB IT SE (30) Priority: 31.03.1995 US 19950414350 14.03.1996 US 19960616106 (71) Applicant: ECOAIR CORP. New Haven, CT 06511 (US)	(72) Inventors: SYVERSON, Charles, D. North Mankato, MN 58001 (US) CURTISS, William, P. Chelsea, MA 02150 (US) FRANCIS, Willard, P. Wallingford, CT 06492 (US) (74) Representative: Smith, Gillian Ruth  MARKS & CLERK, 57-60 Lincoln's Inn Fields London WC2A 3LS London WC2A 3LS (GB)