(19)

(11)

EP 2 087 266 A2

(12)

(88) Date of publication A3: 31.12.2008 (43) Date of publication: 12.08.2009 Bulletin 2009/33 (21) Application number: 07838799.0 (22) Date of filing: 24.09.2007

(51) International Patent Classification (IPC):  F16L 15/00(2006.01) (86) International application number: PCT/US2007/020666 (87) International publication number: WO 2008/039452 (03.04.2008 Gazette 2008/14)

(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 MT NL PL PT RO SE SI SK TR Designated Extension States: AL BA HR MK RS (30) Priority: 22.09.2006 US 826701 P 16.04.2007 US 912052 P (71) Applicant: Eaton Corporation Cleveland, Ohio 44114-2584 (US)	(72) Inventors: WELLS, Michael P. Bowling Green OH 43402 (US) VOGEL, Todd J. Waterville OH 43566 (US) (74) Representative: Rüger, Barthelt & Abel Patentanwälte  Webergasse 3 73728 Esslingen 73728 Esslingen (DE)