(19)

(11)

EP 2 531 755 A1

(12)

(43) Date of publication: 12.12.2012 Bulletin 2012/50 (21) Application number: 11740360.0 (22) Date of filing: 03.02.2011

(51) International Patent Classification (IPC):  F16K 31/02(2006.01) (86) International application number: PCT/US2011/023618 (87) International publication number: WO 2011/097390 (11.08.2011 Gazette 2011/32)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR (30) Priority: 04.02.2010 US 301209 P (71) Applicant: Pinkerton, Joseph F. Austin, TX 78703 (US)	(72) Inventor: Pinkerton, Joseph F. Austin, TX 78703 (US) (74) Representative: Harrison Goddard Foote  Belgrave Hall Belgrave Street Leeds LS2 8DD Leeds LS2 8DD (GB)