(19)

(11)

EP 1 642 029 A2

(12)

(88) Date of publication A3: 06.05.2005 (43) Date of publication: 05.04.2006 Bulletin 2006/14 (21) Application number: 04748779.8 (22) Date of filing: 02.07.2004

(51) International Patent Classification (IPC):  F04B 47/08(1968.09) (86) International application number: PCT/NO2004/000203 (87) International publication number: WO 2005/017299 (24.02.2005 Gazette 2005/08)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR (30) Priority: 03.07.2003 NO 20033044 (71) Applicant: Oil Flow Technology AS N-4902 Tvedestrand (NO)	(72) Inventor: TOR, Arne, Hauge N-4902 Tvedestrand (NO) (74) Representative: Lucas, Brian Ronald  Lucas & Co. 135 Westhall Road Warlingham Surrey CR6 9HJ Warlingham Surrey CR6 9HJ (GB)