(19)

(11)

EP 1 234 220 A1

(12)

(43) Date of publication: 28.08.2002 Bulletin 2002/35 (21) Application number: 00980333.9 (22) Date of filing: 10.11.2000

(51) International Patent Classification (IPC)7: G05D 16/02 (86) International application number: PCT/US0030/937 (87) International publication number: WO 0103/5180 (17.05.2001 Gazette 2001/20)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE Designated Extension States: AL LT LV MK RO SI (30) Priority: 12.11.1999 US 165893 P (71) Applicant: Vent-Matic Co., Inc. Milwaukee, WI 53202 (US)	(72) Inventor: AMIDZICH, Bradford, G. Oconomowoc, WI 53060 (US) (74) Representative: Grünecker, Kinkeldey, Stockmair & SchwanhäusserAnwaltssozietät  Maximilianstrasse 58 80538 München 80538 München (DE)