(19)

(11)

EP 2 047 168 A2

(12)

(88) Date of publication A3: 08.05.2008 (43) Date of publication: 15.04.2009 Bulletin 2009/16 (21) Application number: 07836461.9 (22) Date of filing: 03.08.2007

(51) International Patent Classification (IPC):  F16L 21/06(2006.01) (86) International application number: PCT/US2007/017310 (87) International publication number: WO 2008/019043 (14.02.2008 Gazette 2008/07)

(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: 03.08.2006 US 821317 P (71) Applicant: Eaton Corporation Cleveland, Ohio 44114 (US)	(72) Inventors: VOGEL, Todd, J. Waterville, OH 43566 (US) WILLIAMS, Ryan, J. Sylvania, OH 43560 (US) (74) Representative: Rüger, Barthelt & Abel Patentanwälte  Webergasse 3 73728 Esslingen 73728 Esslingen (DE)