(19)

(11)

EP 1 472 022 A2

(12)

(88) Date of publication A3: 19.08.2004 (43) Date of publication: 03.11.2004 Bulletin 2004/45 (21) Application number: 02794401.6 (22) Date of filing: 26.12.2002

(51) International Patent Classification (IPC)7: B21C 1/00 (86) International application number: PCT/US2002/041264 (87) International publication number: WO 2003/059546 (24.07.2003 Gazette 2003/30)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SI SK TR Designated Extension States: AL LT LV MK RO (30) Priority: 07.01.2002 US 41287 (71) Applicant: Carleton Life Support Systems, Inc. Orchard Park, NY 14127-4195 (US)	(72) Inventor: HART, Russell Davenport, IA 52804 (US) (74) Representative: Hoffmann, Jörg Peter, Dr. Ing.  Müller Hoffmann & PartnerPatentanwälteInnere Wiener Strasse 17 81667 München 81667 München (DE)