(19)

(11)

EP 1 797 326 A2

(12)

(88) Date of publication A3: 22.03.2007 (43) Date of publication: 20.06.2007 Bulletin 2007/25 (21) Application number: 05809082.0 (22) Date of filing: 06.10.2005

(51) International Patent Classification (IPC):  F04B 43/12(2006.01) (86) International application number: PCT/US2005/035886 (87) International publication number: WO 2006/039719 (13.04.2006 Gazette 2006/15)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR Designated Extension States: AL BA HR MK YU (30) Priority: 06.10.2004 US 616240 P (71) Applicant: OCEANEERING INTERNATIONAL, INC. Houston, TX 77041 (US)	(72) Inventors: CUNNINGHAM, Michael Richards, TX 77873 (US) BLANCHARD, Chad Magnolia, TX 77354 (US) (74) Representative: McCall, John Douglas  W.P. THOMPSON & CO. Coopers Building Church Street Liverpool, Merseyside L1 3AB Liverpool, Merseyside L1 3AB (GB)