(19)

(11)

EP 2 235 418 A1

(12)

(43) Date of publication: 06.10.2010 Bulletin 2010/40 (21) Application number: 07870053.1 (22) Date of filing: 28.12.2007

(51) International Patent Classification (IPC):  F16L 9/14(2006.01) (86) International application number: PCT/US2007/089081 (87) International publication number: WO 2009/085051 (09.07.2009 Gazette 2009/28)

(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 (71) Applicant: Robroy Industries, Inc. Verona, PA 15147 (US)	(72) Inventors: ZAPATA, Oscar Odessa Texas 79764 (US) DODDS, John, Joseph Trafford Pennsylvania 15085 (US) (74) Representative: Thomas, Nadine  Bletry & Associés 23, rue du Renard F-75004 Paris F-75004 Paris (FR)